/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-36cd7be [2021-02-23 18:03:15,795 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 18:03:15,799 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 18:03:15,843 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 18:03:15,844 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 18:03:15,846 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 18:03:15,847 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 18:03:15,850 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 18:03:15,852 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 18:03:15,853 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 18:03:15,854 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 18:03:15,856 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 18:03:15,856 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 18:03:15,858 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 18:03:15,859 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 18:03:15,860 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 18:03:15,876 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 18:03:15,881 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 18:03:15,883 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 18:03:15,889 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 18:03:15,894 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 18:03:15,895 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 18:03:15,896 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 18:03:15,901 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 18:03:15,909 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-23 18:03:15,911 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-23 18:03:15,911 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-23 18:03:15,913 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-23 18:03:15,914 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-23 18:03:15,915 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-23 18:03:15,915 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-23 18:03:15,916 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-23 18:03:15,918 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-23 18:03:15,919 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-23 18:03:15,920 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-23 18:03:15,920 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-23 18:03:15,921 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-23 18:03:15,921 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-23 18:03:15,921 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 18:03:15,922 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 18:03:15,924 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 18:03:15,929 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 18:03:15,954 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 18:03:15,955 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 18:03:15,960 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 18:03:15,960 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 18:03:15,960 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 18:03:15,961 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 18:03:15,961 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 18:03:15,961 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 18:03:15,961 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 18:03:15,961 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 18:03:15,963 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 18:03:15,963 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 18:03:15,963 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 18:03:15,963 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 18:03:15,964 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 18:03:15,964 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 18:03:15,964 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 18:03:15,964 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 18:03:15,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 18:03:15,964 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 18:03:15,965 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 18:03:15,965 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 18:03:15,965 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 18:03:16,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 18:03:16,379 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 18:03:16,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 18:03:16,383 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 18:03:16,384 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 18:03:16,385 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/merge_sort-1.i [2021-02-23 18:03:16,478 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78d039202/258b0406258f4175bc95705d95123fd2/FLAG9e9d3f799 [2021-02-23 18:03:17,144 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 18:03:17,145 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/merge_sort-1.i [2021-02-23 18:03:17,169 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78d039202/258b0406258f4175bc95705d95123fd2/FLAG9e9d3f799 [2021-02-23 18:03:17,379 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78d039202/258b0406258f4175bc95705d95123fd2 [2021-02-23 18:03:17,386 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 18:03:17,403 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 18:03:17,407 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 18:03:17,407 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 18:03:17,411 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 18:03:17,412 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:03:17" (1/1) ... [2021-02-23 18:03:17,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a78ed42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:03:17, skipping insertion in model container [2021-02-23 18:03:17,414 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:03:17" (1/1) ... [2021-02-23 18:03:17,424 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 18:03:17,494 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 18:03:17,912 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] [2021-02-23 18:03:17,977 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:03:17,988 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 18:03:18,023 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] [2021-02-23 18:03:18,043 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:03:18,112 INFO L208 MainTranslator]: Completed translation [2021-02-23 18:03:18,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:03:18 WrapperNode [2021-02-23 18:03:18,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 18:03:18,114 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 18:03:18,114 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 18:03:18,114 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 18:03:18,128 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:03:18" (1/1) ... [2021-02-23 18:03:18,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:03:18" (1/1) ... [2021-02-23 18:03:18,145 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:03:18" (1/1) ... [2021-02-23 18:03:18,146 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:03:18" (1/1) ... [2021-02-23 18:03:18,173 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:03:18" (1/1) ... [2021-02-23 18:03:18,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:03:18" (1/1) ... [2021-02-23 18:03:18,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:03:18" (1/1) ... [2021-02-23 18:03:18,242 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 18:03:18,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 18:03:18,243 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 18:03:18,244 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 18:03:18,245 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:03:18" (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 [2021-02-23 18:03:18,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 18:03:18,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 18:03:18,367 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 18:03:18,368 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-02-23 18:03:18,368 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-02-23 18:03:18,368 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2021-02-23 18:03:18,368 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2021-02-23 18:03:18,368 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_pair [2021-02-23 18:03:18,368 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_sort_core [2021-02-23 18:03:18,369 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_before [2021-02-23 18:03:18,369 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_after [2021-02-23 18:03:18,369 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 18:03:18,369 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 18:03:18,369 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 18:03:18,369 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-23 18:03:18,370 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-23 18:03:18,370 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 18:03:18,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 18:03:18,370 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-02-23 18:03:18,370 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-02-23 18:03:18,371 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-02-23 18:03:18,371 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-02-23 18:03:18,371 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-02-23 18:03:18,371 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-02-23 18:03:18,371 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-02-23 18:03:18,371 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-02-23 18:03:18,371 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-02-23 18:03:18,372 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-02-23 18:03:18,372 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-02-23 18:03:18,372 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-02-23 18:03:18,372 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-02-23 18:03:18,372 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-02-23 18:03:18,372 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-02-23 18:03:18,373 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-02-23 18:03:18,373 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-02-23 18:03:18,373 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-02-23 18:03:18,373 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-02-23 18:03:18,373 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-02-23 18:03:18,373 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-02-23 18:03:18,373 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-02-23 18:03:18,374 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-02-23 18:03:18,374 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-02-23 18:03:18,374 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-02-23 18:03:18,374 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-02-23 18:03:18,374 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-02-23 18:03:18,374 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-02-23 18:03:18,374 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-02-23 18:03:18,375 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-02-23 18:03:18,375 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-02-23 18:03:18,375 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-02-23 18:03:18,375 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-02-23 18:03:18,375 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-02-23 18:03:18,375 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-02-23 18:03:18,375 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-02-23 18:03:18,375 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-02-23 18:03:18,376 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-02-23 18:03:18,376 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-02-23 18:03:18,376 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-02-23 18:03:18,376 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-02-23 18:03:18,376 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-02-23 18:03:18,376 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-02-23 18:03:18,376 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-02-23 18:03:18,376 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-02-23 18:03:18,377 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-02-23 18:03:18,377 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-02-23 18:03:18,377 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-02-23 18:03:18,377 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-02-23 18:03:18,377 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-02-23 18:03:18,377 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-02-23 18:03:18,377 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-02-23 18:03:18,378 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-23 18:03:18,378 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-02-23 18:03:18,378 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-02-23 18:03:18,378 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-02-23 18:03:18,378 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-02-23 18:03:18,378 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-02-23 18:03:18,378 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-02-23 18:03:18,379 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-02-23 18:03:18,379 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-02-23 18:03:18,379 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-02-23 18:03:18,379 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-02-23 18:03:18,379 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-02-23 18:03:18,379 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-02-23 18:03:18,379 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-02-23 18:03:18,380 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-02-23 18:03:18,380 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-02-23 18:03:18,380 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-02-23 18:03:18,380 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-02-23 18:03:18,380 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-02-23 18:03:18,380 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-02-23 18:03:18,380 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-02-23 18:03:18,381 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-02-23 18:03:18,381 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-02-23 18:03:18,381 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-02-23 18:03:18,381 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-02-23 18:03:18,381 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-02-23 18:03:18,381 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-02-23 18:03:18,381 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-02-23 18:03:18,382 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-02-23 18:03:18,382 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-02-23 18:03:18,382 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-02-23 18:03:18,382 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-02-23 18:03:18,382 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-02-23 18:03:18,382 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-02-23 18:03:18,382 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-02-23 18:03:18,383 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-02-23 18:03:18,383 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-02-23 18:03:18,383 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-02-23 18:03:18,383 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-02-23 18:03:18,383 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-02-23 18:03:18,383 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-02-23 18:03:18,383 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-02-23 18:03:18,383 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-02-23 18:03:18,384 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-02-23 18:03:18,384 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-02-23 18:03:18,384 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-02-23 18:03:18,384 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-02-23 18:03:18,384 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-02-23 18:03:18,384 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-02-23 18:03:18,384 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 18:03:18,384 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2021-02-23 18:03:18,384 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2021-02-23 18:03:18,385 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-23 18:03:18,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-23 18:03:18,385 INFO L130 BoogieDeclarations]: Found specification of procedure merge_pair [2021-02-23 18:03:18,385 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 18:03:18,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 18:03:18,385 INFO L130 BoogieDeclarations]: Found specification of procedure seq_sort_core [2021-02-23 18:03:18,385 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_before [2021-02-23 18:03:18,386 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_after [2021-02-23 18:03:18,386 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 18:03:18,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-23 18:03:18,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 18:03:18,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 18:03:18,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 18:03:18,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 18:03:19,414 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 18:03:19,415 INFO L299 CfgBuilder]: Removed 33 assume(true) statements. [2021-02-23 18:03:19,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:03:19 BoogieIcfgContainer [2021-02-23 18:03:19,417 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 18:03:19,419 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 18:03:19,420 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 18:03:19,423 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 18:03:19,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 06:03:17" (1/3) ... [2021-02-23 18:03:19,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af2ab0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:03:19, skipping insertion in model container [2021-02-23 18:03:19,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:03:18" (2/3) ... [2021-02-23 18:03:19,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af2ab0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:03:19, skipping insertion in model container [2021-02-23 18:03:19,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:03:19" (3/3) ... [2021-02-23 18:03:19,427 INFO L111 eAbstractionObserver]: Analyzing ICFG merge_sort-1.i [2021-02-23 18:03:19,433 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 18:03:19,466 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 18:03:19,486 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 18:03:19,524 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 18:03:19,524 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 18:03:19,525 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 18:03:19,525 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 18:03:19,526 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 18:03:19,526 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 18:03:19,526 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 18:03:19,526 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 18:03:19,568 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states. [2021-02-23 18:03:19,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-23 18:03:19,577 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:03:19,578 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:03:19,579 INFO L428 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:03:19,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:03:19,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1262471750, now seen corresponding path program 1 times [2021-02-23 18:03:19,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:03:19,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771350282] [2021-02-23 18:03:19,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:03:19,689 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:03:19,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:03:19,793 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:19,794 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:03:19,796 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:19,796 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:03:19,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:03:19,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:03:19,849 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:19,850 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:03:19,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:03:19,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771350282] [2021-02-23 18:03:19,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:03:19,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-23 18:03:19,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646074675] [2021-02-23 18:03:19,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-23 18:03:19,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:03:19,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-23 18:03:19,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 18:03:19,885 INFO L87 Difference]: Start difference. First operand 253 states. Second operand 3 states. [2021-02-23 18:03:20,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:03:20,395 INFO L93 Difference]: Finished difference Result 526 states and 694 transitions. [2021-02-23 18:03:20,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-23 18:03:20,397 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2021-02-23 18:03:20,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:03:20,417 INFO L225 Difference]: With dead ends: 526 [2021-02-23 18:03:20,418 INFO L226 Difference]: Without dead ends: 256 [2021-02-23 18:03:20,430 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 [2021-02-23 18:03:20,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-02-23 18:03:20,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 228. [2021-02-23 18:03:20,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2021-02-23 18:03:20,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 251 transitions. [2021-02-23 18:03:20,539 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 251 transitions. Word has length 19 [2021-02-23 18:03:20,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:03:20,540 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 251 transitions. [2021-02-23 18:03:20,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-23 18:03:20,540 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 251 transitions. [2021-02-23 18:03:20,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-23 18:03:20,541 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:03:20,542 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] [2021-02-23 18:03:20,542 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 18:03:20,542 INFO L428 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:03:20,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:03:20,545 INFO L82 PathProgramCache]: Analyzing trace with hash 229322597, now seen corresponding path program 1 times [2021-02-23 18:03:20,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:03:20,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084898884] [2021-02-23 18:03:20,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:03:20,561 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:03:20,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:03:20,657 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:20,658 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:03:20,666 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:20,668 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:03:20,674 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:20,674 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:03:20,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:03:20,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:03:20,749 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:20,750 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:03:20,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:03:20,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084898884] [2021-02-23 18:03:20,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:03:20,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 18:03:20,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269771497] [2021-02-23 18:03:20,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 18:03:20,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:03:20,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 18:03:20,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 18:03:20,757 INFO L87 Difference]: Start difference. First operand 228 states and 251 transitions. Second operand 4 states. [2021-02-23 18:03:21,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:03:21,239 INFO L93 Difference]: Finished difference Result 457 states and 506 transitions. [2021-02-23 18:03:21,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 18:03:21,240 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2021-02-23 18:03:21,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:03:21,243 INFO L225 Difference]: With dead ends: 457 [2021-02-23 18:03:21,243 INFO L226 Difference]: Without dead ends: 257 [2021-02-23 18:03:21,245 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 [2021-02-23 18:03:21,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-02-23 18:03:21,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 230. [2021-02-23 18:03:21,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2021-02-23 18:03:21,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 253 transitions. [2021-02-23 18:03:21,275 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 253 transitions. Word has length 21 [2021-02-23 18:03:21,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:03:21,276 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 253 transitions. [2021-02-23 18:03:21,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 18:03:21,276 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 253 transitions. [2021-02-23 18:03:21,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-23 18:03:21,277 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:03:21,277 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] [2021-02-23 18:03:21,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 18:03:21,278 INFO L428 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:03:21,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:03:21,278 INFO L82 PathProgramCache]: Analyzing trace with hash -197050510, now seen corresponding path program 1 times [2021-02-23 18:03:21,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:03:21,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943346017] [2021-02-23 18:03:21,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:03:21,448 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:03:21,454 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:03:21,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:03:21,521 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:21,523 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:03:21,523 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:21,525 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:03:21,530 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:21,531 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:03:21,539 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:21,540 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:03:21,549 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:21,550 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:03:21,557 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:21,558 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:03:21,566 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:21,567 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:03:21,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:03:21,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:03:21,602 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:21,603 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:03:21,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:03:21,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943346017] [2021-02-23 18:03:21,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:03:21,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-23 18:03:21,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399904814] [2021-02-23 18:03:21,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 18:03:21,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:03:21,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 18:03:21,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-02-23 18:03:21,608 INFO L87 Difference]: Start difference. First operand 230 states and 253 transitions. Second operand 8 states. [2021-02-23 18:03:22,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:03:22,509 INFO L93 Difference]: Finished difference Result 322 states and 359 transitions. [2021-02-23 18:03:22,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 18:03:22,510 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2021-02-23 18:03:22,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:03:22,513 INFO L225 Difference]: With dead ends: 322 [2021-02-23 18:03:22,513 INFO L226 Difference]: Without dead ends: 317 [2021-02-23 18:03:22,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-02-23 18:03:22,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-02-23 18:03:22,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 235. [2021-02-23 18:03:22,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2021-02-23 18:03:22,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 258 transitions. [2021-02-23 18:03:22,542 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 258 transitions. Word has length 37 [2021-02-23 18:03:22,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:03:22,543 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 258 transitions. [2021-02-23 18:03:22,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 18:03:22,543 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 258 transitions. [2021-02-23 18:03:22,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-02-23 18:03:22,544 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:03:22,545 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] [2021-02-23 18:03:22,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 18:03:22,545 INFO L428 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:03:22,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:03:22,546 INFO L82 PathProgramCache]: Analyzing trace with hash 419317582, now seen corresponding path program 1 times [2021-02-23 18:03:22,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:03:22,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063290534] [2021-02-23 18:03:22,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:03:22,650 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:03:22,658 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:03:22,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:03:22,701 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:22,701 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:03:22,703 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:22,703 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 18:03:22,711 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:22,712 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 18:03:22,723 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:22,724 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:03:22,732 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:22,733 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:03:22,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:03:22,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:03:22,796 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:22,797 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:03:22,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:03:22,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063290534] [2021-02-23 18:03:22,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:03:22,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 18:03:22,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323355841] [2021-02-23 18:03:22,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 18:03:22,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:03:22,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 18:03:22,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 18:03:22,810 INFO L87 Difference]: Start difference. First operand 235 states and 258 transitions. Second operand 6 states. [2021-02-23 18:03:23,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:03:23,628 INFO L93 Difference]: Finished difference Result 252 states and 277 transitions. [2021-02-23 18:03:23,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 18:03:23,630 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2021-02-23 18:03:23,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:03:23,634 INFO L225 Difference]: With dead ends: 252 [2021-02-23 18:03:23,634 INFO L226 Difference]: Without dead ends: 248 [2021-02-23 18:03:23,636 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 [2021-02-23 18:03:23,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-02-23 18:03:23,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 233. [2021-02-23 18:03:23,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2021-02-23 18:03:23,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 255 transitions. [2021-02-23 18:03:23,677 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 255 transitions. Word has length 46 [2021-02-23 18:03:23,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:03:23,677 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 255 transitions. [2021-02-23 18:03:23,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 18:03:23,678 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 255 transitions. [2021-02-23 18:03:23,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-02-23 18:03:23,679 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:03:23,679 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] [2021-02-23 18:03:23,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 18:03:23,679 INFO L428 AbstractCegarLoop]: === Iteration 5 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:03:23,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:03:23,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1961313628, now seen corresponding path program 1 times [2021-02-23 18:03:23,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:03:23,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327970682] [2021-02-23 18:03:23,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:03:23,802 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:03:23,808 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:03:23,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:03:23,893 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:23,893 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:03:23,898 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:23,899 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 18:03:23,907 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:23,908 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-23 18:03:23,917 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:23,918 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 18:03:23,926 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:23,927 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:03:23,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:03:23,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:03:23,953 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:23,954 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:03:23,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:03:23,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327970682] [2021-02-23 18:03:23,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:03:23,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 18:03:23,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215122035] [2021-02-23 18:03:23,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 18:03:23,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:03:23,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 18:03:23,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 18:03:23,961 INFO L87 Difference]: Start difference. First operand 233 states and 255 transitions. Second operand 6 states. [2021-02-23 18:03:24,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:03:24,730 INFO L93 Difference]: Finished difference Result 250 states and 274 transitions. [2021-02-23 18:03:24,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 18:03:24,730 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2021-02-23 18:03:24,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:03:24,733 INFO L225 Difference]: With dead ends: 250 [2021-02-23 18:03:24,733 INFO L226 Difference]: Without dead ends: 246 [2021-02-23 18:03:24,733 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 [2021-02-23 18:03:24,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-02-23 18:03:24,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 231. [2021-02-23 18:03:24,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2021-02-23 18:03:24,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 252 transitions. [2021-02-23 18:03:24,760 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 252 transitions. Word has length 46 [2021-02-23 18:03:24,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:03:24,761 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 252 transitions. [2021-02-23 18:03:24,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 18:03:24,761 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 252 transitions. [2021-02-23 18:03:24,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-02-23 18:03:24,762 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:03:24,762 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] [2021-02-23 18:03:24,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 18:03:24,763 INFO L428 AbstractCegarLoop]: === Iteration 6 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:03:24,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:03:24,763 INFO L82 PathProgramCache]: Analyzing trace with hash 186398228, now seen corresponding path program 1 times [2021-02-23 18:03:24,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:03:24,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941209280] [2021-02-23 18:03:24,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:03:24,851 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:03:24,857 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:03:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:03:24,907 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:24,907 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:03:24,908 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:24,908 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:03:24,911 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:24,912 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:03:24,916 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:24,917 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:03:24,925 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:24,926 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 18:03:24,932 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:24,933 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 18:03:24,939 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:24,939 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 18:03:24,947 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:24,947 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 18:03:24,956 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:24,957 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 18:03:24,966 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:24,967 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:03:24,977 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:24,978 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:03:25,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:03:25,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:03:25,031 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:25,035 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:03:25,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:03:25,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941209280] [2021-02-23 18:03:25,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:03:25,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-23 18:03:25,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869720045] [2021-02-23 18:03:25,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-23 18:03:25,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:03:25,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-23 18:03:25,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-02-23 18:03:25,047 INFO L87 Difference]: Start difference. First operand 231 states and 252 transitions. Second operand 11 states. [2021-02-23 18:03:26,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:03:26,370 INFO L93 Difference]: Finished difference Result 303 states and 333 transitions. [2021-02-23 18:03:26,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-23 18:03:26,371 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2021-02-23 18:03:26,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:03:26,376 INFO L225 Difference]: With dead ends: 303 [2021-02-23 18:03:26,376 INFO L226 Difference]: Without dead ends: 299 [2021-02-23 18:03:26,377 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 [2021-02-23 18:03:26,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-02-23 18:03:26,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 238. [2021-02-23 18:03:26,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2021-02-23 18:03:26,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 259 transitions. [2021-02-23 18:03:26,436 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 259 transitions. Word has length 50 [2021-02-23 18:03:26,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:03:26,438 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 259 transitions. [2021-02-23 18:03:26,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-23 18:03:26,438 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 259 transitions. [2021-02-23 18:03:26,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-02-23 18:03:26,441 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:03:26,441 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] [2021-02-23 18:03:26,441 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 18:03:26,441 INFO L428 AbstractCegarLoop]: === Iteration 7 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:03:26,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:03:26,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1232048662, now seen corresponding path program 1 times [2021-02-23 18:03:26,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:03:26,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604481236] [2021-02-23 18:03:26,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:03:26,555 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:03:26,563 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:03:26,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:03:26,604 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:26,605 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:03:26,605 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:26,606 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:03:26,610 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:26,611 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:03:26,615 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:26,616 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:03:26,621 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:26,622 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 18:03:26,631 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:26,632 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 18:03:26,639 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:26,640 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 18:03:26,650 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:26,651 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 18:03:26,661 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:26,662 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 18:03:26,674 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:26,675 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:03:26,687 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:26,687 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:03:26,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:03:26,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:03:26,720 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:03:26,720 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:03:26,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:03:26,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604481236] [2021-02-23 18:03:26,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:03:26,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-23 18:03:26,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966791069] [2021-02-23 18:03:26,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-23 18:03:26,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:03:26,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-23 18:03:26,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-02-23 18:03:26,729 INFO L87 Difference]: Start difference. First operand 238 states and 259 transitions. Second operand 11 states. [2021-02-23 18:03:28,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:03:28,043 INFO L93 Difference]: Finished difference Result 301 states and 330 transitions. [2021-02-23 18:03:28,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-23 18:03:28,043 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2021-02-23 18:03:28,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:03:28,051 INFO L225 Difference]: With dead ends: 301 [2021-02-23 18:03:28,052 INFO L226 Difference]: Without dead ends: 297 [2021-02-23 18:03:28,053 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 [2021-02-23 18:03:28,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-02-23 18:03:28,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 245. [2021-02-23 18:03:28,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2021-02-23 18:03:28,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 266 transitions. [2021-02-23 18:03:28,085 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 266 transitions. Word has length 50 [2021-02-23 18:03:28,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:03:28,085 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 266 transitions. [2021-02-23 18:03:28,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-23 18:03:28,085 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 266 transitions. [2021-02-23 18:03:28,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-02-23 18:03:28,094 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:03:28,095 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] [2021-02-23 18:03:28,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 18:03:28,095 INFO L428 AbstractCegarLoop]: === Iteration 8 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:03:28,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:03:28,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1026078147, now seen corresponding path program 1 times [2021-02-23 18:03:28,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:03:28,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967714057] [2021-02-23 18:03:28,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:03:28,185 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:03:28,194 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:03:28,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 18:03:28,235 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 18:03:28,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 18:03:28,258 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 18:03:28,311 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 18:03:28,311 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 18:03:28,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 18:03:28,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 06:03:28 BoogieIcfgContainer [2021-02-23 18:03:28,328 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 18:03:28,329 INFO L168 Benchmark]: Toolchain (without parser) took 10938.82 ms. Allocated memory was 151.0 MB in the beginning and 283.1 MB in the end (delta: 132.1 MB). Free memory was 126.5 MB in the beginning and 127.5 MB in the end (delta: -1.0 MB). Peak memory consumption was 131.9 MB. Max. memory is 8.0 GB. [2021-02-23 18:03:28,330 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory was 124.6 MB in the beginning and 124.4 MB in the end (delta: 215.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 18:03:28,331 INFO L168 Benchmark]: CACSL2BoogieTranslator took 706.33 ms. Allocated memory is still 151.0 MB. Free memory was 125.4 MB in the beginning and 101.8 MB in the end (delta: 23.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. [2021-02-23 18:03:28,332 INFO L168 Benchmark]: Boogie Preprocessor took 128.95 ms. Allocated memory is still 151.0 MB. Free memory was 101.8 MB in the beginning and 133.8 MB in the end (delta: -32.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 8.0 GB. [2021-02-23 18:03:28,332 INFO L168 Benchmark]: RCFGBuilder took 1174.13 ms. Allocated memory is still 151.0 MB. Free memory was 133.8 MB in the beginning and 56.9 MB in the end (delta: 76.9 MB). Peak memory consumption was 76.5 MB. Max. memory is 8.0 GB. [2021-02-23 18:03:28,333 INFO L168 Benchmark]: TraceAbstraction took 8908.74 ms. Allocated memory was 151.0 MB in the beginning and 283.1 MB in the end (delta: 132.1 MB). Free memory was 56.4 MB in the beginning and 127.5 MB in the end (delta: -71.1 MB). Peak memory consumption was 62.1 MB. Max. memory is 8.0 GB. [2021-02-23 18:03:28,336 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory was 124.6 MB in the beginning and 124.4 MB in the end (delta: 215.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 706.33 ms. Allocated memory is still 151.0 MB. Free memory was 125.4 MB in the beginning and 101.8 MB in the end (delta: 23.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 128.95 ms. Allocated memory is still 151.0 MB. Free memory was 101.8 MB in the beginning and 133.8 MB in the end (delta: -32.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1174.13 ms. Allocated memory is still 151.0 MB. Free memory was 133.8 MB in the beginning and 56.9 MB in the end (delta: 76.9 MB). Peak memory consumption was 76.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8908.74 ms. Allocated memory was 151.0 MB in the beginning and 283.1 MB in the end (delta: 132.1 MB). Free memory was 56.4 MB in the beginning and 127.5 MB in the end (delta: -71.1 MB). Peak memory consumption was 62.1 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: 8.7s, OverallIterations: 8, TraceHistogramMax: 2, AutomataDifference: 6.2s, 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, 3.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.0s 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: 0.3s 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...