/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/heap-manipulation/merge_sort-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 20:35:54,253 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 20:35:54,258 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 20:35:54,298 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 20:35:54,298 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 20:35:54,300 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 20:35:54,302 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 20:35:54,304 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 20:35:54,306 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 20:35:54,307 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 20:35:54,309 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 20:35:54,310 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 20:35:54,311 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 20:35:54,312 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 20:35:54,313 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 20:35:54,315 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 20:35:54,316 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 20:35:54,329 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 20:35:54,332 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 20:35:54,334 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 20:35:54,336 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 20:35:54,338 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 20:35:54,339 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 20:35:54,340 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 20:35:54,344 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-21 20:35:54,344 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-21 20:35:54,345 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-21 20:35:54,346 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-21 20:35:54,346 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-21 20:35:54,348 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-21 20:35:54,348 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-21 20:35:54,349 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-21 20:35:54,350 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-21 20:35:54,351 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-21 20:35:54,352 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-21 20:35:54,352 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-21 20:35:54,355 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-21 20:35:54,356 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-21 20:35:54,356 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 20:35:54,359 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 20:35:54,361 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 20:35:54,364 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 20:35:54,385 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 20:35:54,385 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 20:35:54,390 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 20:35:54,391 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 20:35:54,391 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 20:35:54,391 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 20:35:54,391 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 20:35:54,392 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 20:35:54,392 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 20:35:54,392 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 20:35:54,393 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 20:35:54,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 20:35:54,394 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 20:35:54,394 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 20:35:54,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 20:35:54,395 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 20:35:54,395 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 20:35:54,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 20:35:54,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 20:35:54,396 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 20:35:54,396 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 20:35:54,396 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 20:35:54,396 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 20:35:54,794 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 20:35:54,827 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 20:35:54,830 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 20:35:54,831 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 20:35:54,832 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 20:35:54,833 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/merge_sort-1.i [2021-02-21 20:35:54,905 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5f09f155/968c89f1cb6e4e5f93a7ad5a8461b708/FLAG3d497337e [2021-02-21 20:35:55,612 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 20:35:55,612 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/merge_sort-1.i [2021-02-21 20:35:55,630 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5f09f155/968c89f1cb6e4e5f93a7ad5a8461b708/FLAG3d497337e [2021-02-21 20:35:55,852 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5f09f155/968c89f1cb6e4e5f93a7ad5a8461b708 [2021-02-21 20:35:55,855 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 20:35:55,870 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 20:35:55,871 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 20:35:55,872 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 20:35:55,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 20:35:55,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:35:55" (1/1) ... [2021-02-21 20:35:55,878 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cd9bd6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:35:55, skipping insertion in model container [2021-02-21 20:35:55,878 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:35:55" (1/1) ... [2021-02-21 20:35:55,887 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 20:35:55,927 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 20:35:56,341 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/merge_sort-1.i[22632,22645] [2021-02-21 20:35:56,417 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:35:56,429 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 20:35:56,496 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/merge_sort-1.i[22632,22645] [2021-02-21 20:35:56,536 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:35:56,660 INFO L208 MainTranslator]: Completed translation [2021-02-21 20:35:56,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:35:56 WrapperNode [2021-02-21 20:35:56,661 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 20:35:56,662 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 20:35:56,663 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 20:35:56,663 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 20:35:56,681 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:35:56" (1/1) ... [2021-02-21 20:35:56,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:35:56" (1/1) ... [2021-02-21 20:35:56,727 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:35:56" (1/1) ... [2021-02-21 20:35:56,728 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:35:56" (1/1) ... [2021-02-21 20:35:56,776 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:35:56" (1/1) ... [2021-02-21 20:35:56,798 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:35:56" (1/1) ... [2021-02-21 20:35:56,810 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:35:56" (1/1) ... [2021-02-21 20:35:56,824 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 20:35:56,828 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 20:35:56,828 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 20:35:56,829 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 20:35:56,830 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:35:56" (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 [2021-02-21 20:35:56,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 20:35:56,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 20:35:56,956 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 20:35:56,956 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-02-21 20:35:56,957 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-02-21 20:35:56,957 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2021-02-21 20:35:56,957 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2021-02-21 20:35:56,957 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_pair [2021-02-21 20:35:56,958 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_sort_core [2021-02-21 20:35:56,958 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_before [2021-02-21 20:35:56,958 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_after [2021-02-21 20:35:56,958 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 20:35:56,958 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 20:35:56,958 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 20:35:56,959 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-21 20:35:56,959 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-21 20:35:56,959 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 20:35:56,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 20:35:56,960 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-02-21 20:35:56,960 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-02-21 20:35:56,960 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-02-21 20:35:56,960 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-02-21 20:35:56,960 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-02-21 20:35:56,960 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-02-21 20:35:56,961 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-02-21 20:35:56,961 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-02-21 20:35:56,961 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-02-21 20:35:56,961 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-02-21 20:35:56,961 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-02-21 20:35:56,962 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-02-21 20:35:56,962 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-02-21 20:35:56,962 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-02-21 20:35:56,962 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-02-21 20:35:56,962 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-02-21 20:35:56,963 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-02-21 20:35:56,963 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-02-21 20:35:56,963 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-02-21 20:35:56,963 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-02-21 20:35:56,963 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-02-21 20:35:56,963 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-02-21 20:35:56,964 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-02-21 20:35:56,964 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-02-21 20:35:56,964 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-02-21 20:35:56,964 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-02-21 20:35:56,964 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-02-21 20:35:56,964 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-02-21 20:35:56,964 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-02-21 20:35:56,965 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-02-21 20:35:56,965 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-02-21 20:35:56,965 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-02-21 20:35:56,965 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-02-21 20:35:56,965 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-02-21 20:35:56,965 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-02-21 20:35:56,966 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-02-21 20:35:56,966 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-02-21 20:35:56,966 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-02-21 20:35:56,966 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-02-21 20:35:56,966 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-02-21 20:35:56,966 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-02-21 20:35:56,967 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-02-21 20:35:56,967 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-02-21 20:35:56,967 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-02-21 20:35:56,967 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-02-21 20:35:56,967 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-02-21 20:35:56,967 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-02-21 20:35:56,968 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-02-21 20:35:56,968 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-02-21 20:35:56,968 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-02-21 20:35:56,968 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-02-21 20:35:56,968 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-02-21 20:35:56,968 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-21 20:35:56,968 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-02-21 20:35:56,969 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-02-21 20:35:56,969 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-02-21 20:35:56,969 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-02-21 20:35:56,969 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-02-21 20:35:56,969 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-02-21 20:35:56,969 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-02-21 20:35:56,970 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-02-21 20:35:56,970 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-02-21 20:35:56,970 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-02-21 20:35:56,970 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-02-21 20:35:56,970 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-02-21 20:35:56,970 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-02-21 20:35:56,971 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-02-21 20:35:56,971 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-02-21 20:35:56,971 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-02-21 20:35:56,971 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-02-21 20:35:56,971 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-02-21 20:35:56,972 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-02-21 20:35:56,972 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-02-21 20:35:56,972 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-02-21 20:35:56,972 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-02-21 20:35:56,972 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-02-21 20:35:56,972 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-02-21 20:35:56,973 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-02-21 20:35:56,973 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-02-21 20:35:56,973 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-02-21 20:35:56,973 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-02-21 20:35:56,973 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-02-21 20:35:56,973 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-02-21 20:35:56,974 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-02-21 20:35:56,974 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-02-21 20:35:56,974 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-02-21 20:35:56,974 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-02-21 20:35:56,974 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-02-21 20:35:56,974 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-02-21 20:35:56,974 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-02-21 20:35:56,975 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-02-21 20:35:56,975 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-02-21 20:35:56,975 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-02-21 20:35:56,975 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-02-21 20:35:56,975 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-02-21 20:35:56,975 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-02-21 20:35:56,976 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-02-21 20:35:56,976 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-02-21 20:35:56,976 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-02-21 20:35:56,976 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-02-21 20:35:56,976 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-02-21 20:35:56,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 20:35:56,976 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2021-02-21 20:35:56,977 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2021-02-21 20:35:56,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-21 20:35:56,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-21 20:35:56,977 INFO L130 BoogieDeclarations]: Found specification of procedure merge_pair [2021-02-21 20:35:56,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 20:35:56,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 20:35:56,977 INFO L130 BoogieDeclarations]: Found specification of procedure seq_sort_core [2021-02-21 20:35:56,978 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_before [2021-02-21 20:35:56,978 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_after [2021-02-21 20:35:56,978 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 20:35:56,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-21 20:35:56,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 20:35:56,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 20:35:56,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 20:35:56,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 20:35:57,924 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 20:35:57,924 INFO L299 CfgBuilder]: Removed 33 assume(true) statements. [2021-02-21 20:35:57,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:35:57 BoogieIcfgContainer [2021-02-21 20:35:57,927 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 20:35:57,928 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 20:35:57,928 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 20:35:57,932 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 20:35:57,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 08:35:55" (1/3) ... [2021-02-21 20:35:57,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1332e340 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:35:57, skipping insertion in model container [2021-02-21 20:35:57,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:35:56" (2/3) ... [2021-02-21 20:35:57,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1332e340 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:35:57, skipping insertion in model container [2021-02-21 20:35:57,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:35:57" (3/3) ... [2021-02-21 20:35:57,936 INFO L111 eAbstractionObserver]: Analyzing ICFG merge_sort-1.i [2021-02-21 20:35:57,942 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 20:35:57,948 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 20:35:57,967 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 20:35:57,992 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 20:35:57,992 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 20:35:57,992 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 20:35:57,992 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 20:35:57,993 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 20:35:57,993 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 20:35:57,993 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 20:35:57,993 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 20:35:58,016 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states. [2021-02-21 20:35:58,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-21 20:35:58,025 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:35:58,026 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:35:58,026 INFO L428 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:35:58,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:35:58,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1262471750, now seen corresponding path program 1 times [2021-02-21 20:35:58,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:35:58,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782392474] [2021-02-21 20:35:58,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:35:58,137 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:35:58,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:35:58,249 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:35:58,251 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:35:58,252 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:35:58,253 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:35:58,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:35:58,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:35:58,357 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:35:58,357 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:35:58,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:35:58,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782392474] [2021-02-21 20:35:58,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:35:58,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-21 20:35:58,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753955193] [2021-02-21 20:35:58,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-21 20:35:58,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:35:58,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-21 20:35:58,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 20:35:58,409 INFO L87 Difference]: Start difference. First operand 253 states. Second operand 3 states. [2021-02-21 20:35:59,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:35:59,099 INFO L93 Difference]: Finished difference Result 526 states and 694 transitions. [2021-02-21 20:35:59,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-21 20:35:59,101 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2021-02-21 20:35:59,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:35:59,116 INFO L225 Difference]: With dead ends: 526 [2021-02-21 20:35:59,116 INFO L226 Difference]: Without dead ends: 256 [2021-02-21 20:35:59,124 INFO L677 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 [2021-02-21 20:35:59,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-02-21 20:35:59,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 228. [2021-02-21 20:35:59,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2021-02-21 20:35:59,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 251 transitions. [2021-02-21 20:35:59,208 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 251 transitions. Word has length 19 [2021-02-21 20:35:59,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:35:59,209 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 251 transitions. [2021-02-21 20:35:59,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-21 20:35:59,209 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 251 transitions. [2021-02-21 20:35:59,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-21 20:35:59,210 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:35:59,210 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:35:59,211 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 20:35:59,211 INFO L428 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:35:59,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:35:59,212 INFO L82 PathProgramCache]: Analyzing trace with hash 229322597, now seen corresponding path program 1 times [2021-02-21 20:35:59,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:35:59,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68072369] [2021-02-21 20:35:59,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:35:59,218 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:35:59,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:35:59,275 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:35:59,276 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:35:59,284 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:35:59,286 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:35:59,293 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:35:59,294 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:35:59,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:35:59,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:35:59,345 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:35:59,346 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:35:59,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:35:59,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68072369] [2021-02-21 20:35:59,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:35:59,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 20:35:59,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281134605] [2021-02-21 20:35:59,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 20:35:59,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:35:59,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 20:35:59,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 20:35:59,357 INFO L87 Difference]: Start difference. First operand 228 states and 251 transitions. Second operand 4 states. [2021-02-21 20:35:59,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:35:59,865 INFO L93 Difference]: Finished difference Result 457 states and 506 transitions. [2021-02-21 20:35:59,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 20:35:59,866 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2021-02-21 20:35:59,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:35:59,874 INFO L225 Difference]: With dead ends: 457 [2021-02-21 20:35:59,874 INFO L226 Difference]: Without dead ends: 257 [2021-02-21 20:35:59,876 INFO L677 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 [2021-02-21 20:35:59,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-02-21 20:35:59,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 230. [2021-02-21 20:35:59,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2021-02-21 20:35:59,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 253 transitions. [2021-02-21 20:35:59,932 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 253 transitions. Word has length 21 [2021-02-21 20:35:59,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:35:59,933 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 253 transitions. [2021-02-21 20:35:59,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 20:35:59,933 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 253 transitions. [2021-02-21 20:35:59,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-21 20:35:59,934 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:35:59,935 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] [2021-02-21 20:35:59,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 20:35:59,935 INFO L428 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:35:59,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:35:59,936 INFO L82 PathProgramCache]: Analyzing trace with hash -197050510, now seen corresponding path program 1 times [2021-02-21 20:35:59,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:35:59,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373363937] [2021-02-21 20:35:59,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:36:00,087 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 20:36:00,094 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:36:00,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:36:00,168 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:00,168 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:36:00,169 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:00,169 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 20:36:00,172 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:00,173 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 20:36:00,177 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:00,177 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 20:36:00,182 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:00,183 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 20:36:00,188 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:00,189 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 20:36:00,195 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:00,196 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:36:00,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:36:00,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:36:00,232 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:00,233 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:36:00,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:36:00,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373363937] [2021-02-21 20:36:00,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:36:00,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-21 20:36:00,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383292204] [2021-02-21 20:36:00,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-21 20:36:00,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:36:00,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-21 20:36:00,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-02-21 20:36:00,241 INFO L87 Difference]: Start difference. First operand 230 states and 253 transitions. Second operand 8 states. [2021-02-21 20:36:01,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:36:01,245 INFO L93 Difference]: Finished difference Result 322 states and 359 transitions. [2021-02-21 20:36:01,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-21 20:36:01,245 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2021-02-21 20:36:01,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:36:01,248 INFO L225 Difference]: With dead ends: 322 [2021-02-21 20:36:01,248 INFO L226 Difference]: Without dead ends: 317 [2021-02-21 20:36:01,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-02-21 20:36:01,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-02-21 20:36:01,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 235. [2021-02-21 20:36:01,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2021-02-21 20:36:01,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 258 transitions. [2021-02-21 20:36:01,279 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 258 transitions. Word has length 37 [2021-02-21 20:36:01,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:36:01,279 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 258 transitions. [2021-02-21 20:36:01,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-21 20:36:01,280 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 258 transitions. [2021-02-21 20:36:01,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-02-21 20:36:01,281 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:36:01,281 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] [2021-02-21 20:36:01,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 20:36:01,282 INFO L428 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:36:01,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:36:01,283 INFO L82 PathProgramCache]: Analyzing trace with hash 419317582, now seen corresponding path program 1 times [2021-02-21 20:36:01,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:36:01,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571370821] [2021-02-21 20:36:01,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:36:01,394 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 20:36:01,402 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:36:01,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:36:01,452 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:01,453 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:36:01,454 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:01,455 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 20:36:01,462 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:01,463 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 20:36:01,472 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:01,473 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:36:01,482 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:01,482 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:36:01,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:36:01,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:36:01,512 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:01,512 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:36:01,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:36:01,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571370821] [2021-02-21 20:36:01,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:36:01,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 20:36:01,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448884312] [2021-02-21 20:36:01,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 20:36:01,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:36:01,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 20:36:01,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 20:36:01,520 INFO L87 Difference]: Start difference. First operand 235 states and 258 transitions. Second operand 6 states. [2021-02-21 20:36:02,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:36:02,350 INFO L93 Difference]: Finished difference Result 252 states and 277 transitions. [2021-02-21 20:36:02,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-21 20:36:02,352 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2021-02-21 20:36:02,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:36:02,354 INFO L225 Difference]: With dead ends: 252 [2021-02-21 20:36:02,354 INFO L226 Difference]: Without dead ends: 248 [2021-02-21 20:36:02,355 INFO L677 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 [2021-02-21 20:36:02,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-02-21 20:36:02,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 233. [2021-02-21 20:36:02,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2021-02-21 20:36:02,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 255 transitions. [2021-02-21 20:36:02,383 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 255 transitions. Word has length 46 [2021-02-21 20:36:02,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:36:02,383 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 255 transitions. [2021-02-21 20:36:02,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 20:36:02,384 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 255 transitions. [2021-02-21 20:36:02,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-02-21 20:36:02,385 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:36:02,385 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] [2021-02-21 20:36:02,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 20:36:02,385 INFO L428 AbstractCegarLoop]: === Iteration 5 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:36:02,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:36:02,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1961313628, now seen corresponding path program 1 times [2021-02-21 20:36:02,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:36:02,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507400115] [2021-02-21 20:36:02,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:36:02,485 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 20:36:02,494 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:36:02,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:36:02,534 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:02,535 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:36:02,536 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:02,536 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 20:36:02,545 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:02,546 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-21 20:36:02,555 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:02,556 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 20:36:02,565 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:02,566 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:36:02,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:36:02,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:36:02,596 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:02,597 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:36:02,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:36:02,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507400115] [2021-02-21 20:36:02,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:36:02,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 20:36:02,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069282756] [2021-02-21 20:36:02,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 20:36:02,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:36:02,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 20:36:02,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 20:36:02,604 INFO L87 Difference]: Start difference. First operand 233 states and 255 transitions. Second operand 6 states. [2021-02-21 20:36:03,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:36:03,419 INFO L93 Difference]: Finished difference Result 250 states and 274 transitions. [2021-02-21 20:36:03,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-21 20:36:03,421 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2021-02-21 20:36:03,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:36:03,424 INFO L225 Difference]: With dead ends: 250 [2021-02-21 20:36:03,424 INFO L226 Difference]: Without dead ends: 246 [2021-02-21 20:36:03,424 INFO L677 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 [2021-02-21 20:36:03,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-02-21 20:36:03,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 231. [2021-02-21 20:36:03,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2021-02-21 20:36:03,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 252 transitions. [2021-02-21 20:36:03,453 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 252 transitions. Word has length 46 [2021-02-21 20:36:03,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:36:03,453 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 252 transitions. [2021-02-21 20:36:03,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 20:36:03,454 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 252 transitions. [2021-02-21 20:36:03,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-02-21 20:36:03,455 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:36:03,455 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] [2021-02-21 20:36:03,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 20:36:03,455 INFO L428 AbstractCegarLoop]: === Iteration 6 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:36:03,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:36:03,456 INFO L82 PathProgramCache]: Analyzing trace with hash 186398228, now seen corresponding path program 1 times [2021-02-21 20:36:03,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:36:03,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175438555] [2021-02-21 20:36:03,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:36:03,559 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 20:36:03,568 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:36:03,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:36:03,661 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:03,662 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:36:03,662 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:03,664 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:36:03,668 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:03,668 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:36:03,672 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:03,674 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 20:36:03,679 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:03,680 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 20:36:03,687 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:03,688 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-21 20:36:03,693 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:03,694 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-21 20:36:03,702 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:03,703 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-21 20:36:03,713 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:03,713 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-21 20:36:03,723 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:03,725 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 20:36:03,736 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:03,737 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:36:03,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:36:03,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:36:03,793 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:03,795 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:36:03,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:36:03,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175438555] [2021-02-21 20:36:03,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:36:03,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-21 20:36:03,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641252939] [2021-02-21 20:36:03,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-21 20:36:03,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:36:03,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-21 20:36:03,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-02-21 20:36:03,813 INFO L87 Difference]: Start difference. First operand 231 states and 252 transitions. Second operand 11 states. [2021-02-21 20:36:05,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:36:05,141 INFO L93 Difference]: Finished difference Result 303 states and 333 transitions. [2021-02-21 20:36:05,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-21 20:36:05,141 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2021-02-21 20:36:05,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:36:05,144 INFO L225 Difference]: With dead ends: 303 [2021-02-21 20:36:05,144 INFO L226 Difference]: Without dead ends: 299 [2021-02-21 20:36:05,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-02-21 20:36:05,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-02-21 20:36:05,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 238. [2021-02-21 20:36:05,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2021-02-21 20:36:05,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 259 transitions. [2021-02-21 20:36:05,175 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 259 transitions. Word has length 50 [2021-02-21 20:36:05,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:36:05,175 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 259 transitions. [2021-02-21 20:36:05,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-21 20:36:05,175 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 259 transitions. [2021-02-21 20:36:05,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-02-21 20:36:05,177 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:36:05,177 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] [2021-02-21 20:36:05,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 20:36:05,177 INFO L428 AbstractCegarLoop]: === Iteration 7 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:36:05,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:36:05,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1232048662, now seen corresponding path program 1 times [2021-02-21 20:36:05,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:36:05,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514323761] [2021-02-21 20:36:05,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:36:05,293 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 20:36:05,302 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:36:05,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:36:05,348 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:05,348 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:36:05,349 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:05,350 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:36:05,354 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:05,354 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:36:05,359 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:05,360 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 20:36:05,366 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:05,367 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 20:36:05,375 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:05,376 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-21 20:36:05,383 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:05,384 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-21 20:36:05,393 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:05,393 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-21 20:36:05,403 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:05,404 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-21 20:36:05,415 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:05,416 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 20:36:05,427 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:05,428 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:36:05,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:36:05,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:36:05,462 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:05,463 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:36:05,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:36:05,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514323761] [2021-02-21 20:36:05,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:36:05,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-21 20:36:05,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304196308] [2021-02-21 20:36:05,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-21 20:36:05,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:36:05,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-21 20:36:05,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-02-21 20:36:05,475 INFO L87 Difference]: Start difference. First operand 238 states and 259 transitions. Second operand 11 states. [2021-02-21 20:36:06,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:36:06,850 INFO L93 Difference]: Finished difference Result 301 states and 330 transitions. [2021-02-21 20:36:06,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-21 20:36:06,851 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2021-02-21 20:36:06,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:36:06,853 INFO L225 Difference]: With dead ends: 301 [2021-02-21 20:36:06,854 INFO L226 Difference]: Without dead ends: 297 [2021-02-21 20:36:06,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-02-21 20:36:06,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-02-21 20:36:06,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 245. [2021-02-21 20:36:06,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2021-02-21 20:36:06,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 266 transitions. [2021-02-21 20:36:06,886 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 266 transitions. Word has length 50 [2021-02-21 20:36:06,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:36:06,886 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 266 transitions. [2021-02-21 20:36:06,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-21 20:36:06,887 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 266 transitions. [2021-02-21 20:36:06,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-02-21 20:36:06,888 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:36:06,888 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, 1, 1, 1, 1] [2021-02-21 20:36:06,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 20:36:06,889 INFO L428 AbstractCegarLoop]: === Iteration 8 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:36:06,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:36:06,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1026078147, now seen corresponding path program 1 times [2021-02-21 20:36:06,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:36:06,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146511543] [2021-02-21 20:36:06,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:36:06,983 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 20:36:06,989 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:36:07,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:36:07,010 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:36:07,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:36:07,032 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:36:07,097 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-21 20:36:07,097 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 20:36:07,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-21 20:36:07,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 08:36:07 BoogieIcfgContainer [2021-02-21 20:36:07,117 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 20:36:07,119 INFO L168 Benchmark]: Toolchain (without parser) took 11261.59 ms. Allocated memory was 152.0 MB in the beginning and 263.2 MB in the end (delta: 111.1 MB). Free memory was 126.9 MB in the beginning and 108.7 MB in the end (delta: 18.2 MB). Peak memory consumption was 131.0 MB. Max. memory is 8.0 GB. [2021-02-21 20:36:07,119 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 152.0 MB. Free memory is still 126.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 20:36:07,120 INFO L168 Benchmark]: CACSL2BoogieTranslator took 790.28 ms. Allocated memory is still 152.0 MB. Free memory was 125.9 MB in the beginning and 133.0 MB in the end (delta: -7.1 MB). Peak memory consumption was 28.0 MB. Max. memory is 8.0 GB. [2021-02-21 20:36:07,121 INFO L168 Benchmark]: Boogie Preprocessor took 161.62 ms. Allocated memory is still 152.0 MB. Free memory was 133.0 MB in the beginning and 129.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-02-21 20:36:07,121 INFO L168 Benchmark]: RCFGBuilder took 1098.80 ms. Allocated memory is still 152.0 MB. Free memory was 129.8 MB in the beginning and 112.8 MB in the end (delta: 17.0 MB). Peak memory consumption was 62.6 MB. Max. memory is 8.0 GB. [2021-02-21 20:36:07,122 INFO L168 Benchmark]: TraceAbstraction took 9189.11 ms. Allocated memory was 152.0 MB in the beginning and 263.2 MB in the end (delta: 111.1 MB). Free memory was 112.3 MB in the beginning and 108.7 MB in the end (delta: 3.6 MB). Peak memory consumption was 114.8 MB. Max. memory is 8.0 GB. [2021-02-21 20:36:07,125 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 152.0 MB. Free memory is still 126.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 790.28 ms. Allocated memory is still 152.0 MB. Free memory was 125.9 MB in the beginning and 133.0 MB in the end (delta: -7.1 MB). Peak memory consumption was 28.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 161.62 ms. Allocated memory is still 152.0 MB. Free memory was 133.0 MB in the beginning and 129.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1098.80 ms. Allocated memory is still 152.0 MB. Free memory was 129.8 MB in the beginning and 112.8 MB in the end (delta: 17.0 MB). Peak memory consumption was 62.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 9189.11 ms. Allocated memory was 152.0 MB in the beginning and 263.2 MB in the end (delta: 111.1 MB). Free memory was 112.3 MB in the beginning and 108.7 MB in the end (delta: 3.6 MB). Peak memory consumption was 114.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 565]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L638] struct list *data = ((void *)0); [L639] COND TRUE __VERIFIER_nondet_int() [L640] struct node *node = malloc(sizeof *node); [L641] COND FALSE !(!node) [L643] node->next = node [L644] node->value = __VERIFIER_nondet_int() [L645] struct list *item = malloc(sizeof *item); [L646] COND FALSE !(!item) [L648] item->slist = node [L649] item->next = data [L650] data = item [L639] COND FALSE !(__VERIFIER_nondet_int()) [L652] COND FALSE !(!data) [L654] CALL inspect_before(data) [L615] COND FALSE !(!(shape)) [L616] shape->next [L616] COND FALSE !(shape->next) [L622] COND FALSE !(!(shape)) [L623] EXPR shape->next [L623] COND FALSE !(!(shape->next == ((void *)0))) [L624] EXPR shape->slist [L624] COND FALSE !(!(shape->slist)) [L625] EXPR shape->slist [L625] EXPR shape->slist->next [L625] COND TRUE !(shape->slist->next == ((void *)0)) [L625] CALL fail() [L565] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 268 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.1s, OverallIterations: 8, TraceHistogramMax: 2, AutomataDifference: 6.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1676 SDtfs, 1822 SDslu, 2931 SDs, 0 SdLazy, 4616 SolverSat, 242 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=253occurred 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...