/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/heap-manipulation/merge_sort-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 22:16:30,363 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 22:16:30,367 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 22:16:30,413 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 22:16:30,413 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 22:16:30,422 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 22:16:30,426 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 22:16:30,430 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 22:16:30,433 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 22:16:30,436 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 22:16:30,437 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 22:16:30,438 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 22:16:30,438 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 22:16:30,441 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 22:16:30,443 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 22:16:30,444 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 22:16:30,446 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 22:16:30,447 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 22:16:30,449 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 22:16:30,457 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 22:16:30,460 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 22:16:30,461 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 22:16:30,462 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 22:16:30,462 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 22:16:30,479 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 22:16:30,479 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 22:16:30,480 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 22:16:30,483 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 22:16:30,484 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 22:16:30,485 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 22:16:30,485 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 22:16:30,489 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 22:16:30,492 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 22:16:30,495 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 22:16:30,496 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 22:16:30,496 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 22:16:30,497 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 22:16:30,498 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 22:16:30,498 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 22:16:30,499 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 22:16:30,499 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 22:16:30,501 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 22:16:30,516 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 22:16:30,517 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 22:16:30,519 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 22:16:30,520 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 22:16:30,520 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 22:16:30,520 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 22:16:30,520 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 22:16:30,520 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 22:16:30,521 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 22:16:30,521 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 22:16:30,522 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 22:16:30,522 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 22:16:30,522 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 22:16:30,523 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 22:16:30,523 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 22:16:30,523 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 22:16:30,523 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 22:16:30,524 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 22:16:30,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 22:16:30,524 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 22:16:30,524 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 22:16:30,525 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 22:16:30,525 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-08-22 22:16:30,919 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 22:16:30,951 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 22:16:30,957 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 22:16:30,959 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 22:16:30,959 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 22:16:30,960 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/merge_sort-1.i [2020-08-22 22:16:31,055 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e3ddc3b6/582ff2fb186745eca8df3b31cf50d0b3/FLAG5e8965305 [2020-08-22 22:16:31,704 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 22:16:31,705 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/merge_sort-1.i [2020-08-22 22:16:31,732 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e3ddc3b6/582ff2fb186745eca8df3b31cf50d0b3/FLAG5e8965305 [2020-08-22 22:16:31,980 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e3ddc3b6/582ff2fb186745eca8df3b31cf50d0b3 [2020-08-22 22:16:31,991 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 22:16:31,993 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 22:16:31,996 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 22:16:31,996 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 22:16:32,001 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 22:16:32,002 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:16:31" (1/1) ... [2020-08-22 22:16:32,006 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f06d9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:16:32, skipping insertion in model container [2020-08-22 22:16:32,007 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:16:31" (1/1) ... [2020-08-22 22:16:32,017 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 22:16:32,068 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 22:16:32,594 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:16:32,611 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 22:16:32,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:16:32,742 INFO L208 MainTranslator]: Completed translation [2020-08-22 22:16:32,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:16:32 WrapperNode [2020-08-22 22:16:32,743 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 22:16:32,744 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 22:16:32,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 22:16:32,745 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 22:16:32,760 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:16:32" (1/1) ... [2020-08-22 22:16:32,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:16:32" (1/1) ... [2020-08-22 22:16:32,790 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:16:32" (1/1) ... [2020-08-22 22:16:32,791 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:16:32" (1/1) ... [2020-08-22 22:16:32,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:16:32" (1/1) ... [2020-08-22 22:16:32,841 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:16:32" (1/1) ... [2020-08-22 22:16:32,849 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:16:32" (1/1) ... [2020-08-22 22:16:32,859 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 22:16:32,860 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 22:16:32,860 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 22:16:32,860 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 22:16:32,864 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:16:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 22:16:32,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 22:16:32,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 22:16:32,933 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-22 22:16:32,933 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-22 22:16:32,933 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-08-22 22:16:32,933 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2020-08-22 22:16:32,934 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_pair [2020-08-22 22:16:32,934 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_sort_core [2020-08-22 22:16:32,934 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_before [2020-08-22 22:16:32,934 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_after [2020-08-22 22:16:32,935 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 22:16:32,935 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 22:16:32,935 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-22 22:16:32,935 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-22 22:16:32,936 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-22 22:16:32,936 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-22 22:16:32,936 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-22 22:16:32,936 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-22 22:16:32,937 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-22 22:16:32,937 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-22 22:16:32,937 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-22 22:16:32,938 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-22 22:16:32,938 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-22 22:16:32,938 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-22 22:16:32,938 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-22 22:16:32,938 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-22 22:16:32,939 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-22 22:16:32,939 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-22 22:16:32,939 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-22 22:16:32,939 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-22 22:16:32,939 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-22 22:16:32,939 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-22 22:16:32,940 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-22 22:16:32,940 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-22 22:16:32,940 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-22 22:16:32,940 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-22 22:16:32,940 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-22 22:16:32,940 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-22 22:16:32,941 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-22 22:16:32,941 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-22 22:16:32,941 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-22 22:16:32,941 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-22 22:16:32,941 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-22 22:16:32,942 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-22 22:16:32,942 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-22 22:16:32,942 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-22 22:16:32,942 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-22 22:16:32,942 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-22 22:16:32,942 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-22 22:16:32,943 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-22 22:16:32,943 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-22 22:16:32,943 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-22 22:16:32,943 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-22 22:16:32,943 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-22 22:16:32,943 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-22 22:16:32,944 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-22 22:16:32,944 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-22 22:16:32,944 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-22 22:16:32,944 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-22 22:16:32,944 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-22 22:16:32,944 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-22 22:16:32,944 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-22 22:16:32,945 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-22 22:16:32,945 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-22 22:16:32,945 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 22:16:32,945 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-22 22:16:32,945 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-22 22:16:32,945 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-22 22:16:32,946 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-22 22:16:32,946 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-22 22:16:32,946 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-22 22:16:32,946 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-22 22:16:32,946 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 22:16:32,946 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-22 22:16:32,947 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-22 22:16:32,947 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-22 22:16:32,947 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-22 22:16:32,947 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-22 22:16:32,947 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-22 22:16:32,947 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-22 22:16:32,948 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-22 22:16:32,948 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-22 22:16:32,948 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-22 22:16:32,948 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-22 22:16:32,948 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-22 22:16:32,948 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-22 22:16:32,949 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-22 22:16:32,949 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-22 22:16:32,949 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-22 22:16:32,949 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-22 22:16:32,949 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-22 22:16:32,950 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-22 22:16:32,950 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-22 22:16:32,950 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-22 22:16:32,950 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-22 22:16:32,950 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-22 22:16:32,950 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-22 22:16:32,950 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-22 22:16:32,951 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-22 22:16:32,951 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-22 22:16:32,951 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-22 22:16:32,951 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-22 22:16:32,951 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-22 22:16:32,951 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-22 22:16:32,952 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-22 22:16:32,952 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-22 22:16:32,952 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-22 22:16:32,952 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-22 22:16:32,952 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-22 22:16:32,952 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-22 22:16:32,952 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-22 22:16:32,953 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-22 22:16:32,953 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-22 22:16:32,953 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-22 22:16:32,953 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 22:16:32,953 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-08-22 22:16:32,953 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2020-08-22 22:16:32,954 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 22:16:32,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 22:16:32,954 INFO L130 BoogieDeclarations]: Found specification of procedure merge_pair [2020-08-22 22:16:32,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 22:16:32,954 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 22:16:32,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 22:16:32,954 INFO L130 BoogieDeclarations]: Found specification of procedure seq_sort_core [2020-08-22 22:16:32,955 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_before [2020-08-22 22:16:32,955 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_after [2020-08-22 22:16:32,955 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 22:16:32,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 22:16:32,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 22:16:32,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 22:16:32,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 22:16:34,079 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 22:16:34,080 INFO L295 CfgBuilder]: Removed 33 assume(true) statements. [2020-08-22 22:16:34,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:16:34 BoogieIcfgContainer [2020-08-22 22:16:34,096 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 22:16:34,100 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 22:16:34,101 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 22:16:34,105 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 22:16:34,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 10:16:31" (1/3) ... [2020-08-22 22:16:34,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f47e237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:16:34, skipping insertion in model container [2020-08-22 22:16:34,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:16:32" (2/3) ... [2020-08-22 22:16:34,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f47e237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:16:34, skipping insertion in model container [2020-08-22 22:16:34,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:16:34" (3/3) ... [2020-08-22 22:16:34,111 INFO L109 eAbstractionObserver]: Analyzing ICFG merge_sort-1.i [2020-08-22 22:16:34,128 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 22:16:34,142 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 22:16:34,159 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 22:16:34,193 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 22:16:34,195 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 22:16:34,195 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 22:16:34,204 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 22:16:34,204 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 22:16:34,204 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 22:16:34,205 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 22:16:34,206 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 22:16:34,245 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states. [2020-08-22 22:16:34,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-22 22:16:34,268 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:16:34,270 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:16:34,271 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:16:34,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:16:34,280 INFO L82 PathProgramCache]: Analyzing trace with hash -2091922853, now seen corresponding path program 1 times [2020-08-22 22:16:34,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:16:34,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535632340] [2020-08-22 22:16:34,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:16:34,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:16:34,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:16:34,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:16:34,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:16:34,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535632340] [2020-08-22 22:16:34,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:16:34,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 22:16:34,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274901444] [2020-08-22 22:16:34,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 22:16:34,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:16:34,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 22:16:34,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:16:34,522 INFO L87 Difference]: Start difference. First operand 248 states. Second operand 3 states. [2020-08-22 22:16:34,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:16:34,968 INFO L93 Difference]: Finished difference Result 521 states and 689 transitions. [2020-08-22 22:16:34,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 22:16:34,970 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-08-22 22:16:34,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:16:34,988 INFO L225 Difference]: With dead ends: 521 [2020-08-22 22:16:34,989 INFO L226 Difference]: Without dead ends: 252 [2020-08-22 22:16:34,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:16:35,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-08-22 22:16:35,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 224. [2020-08-22 22:16:35,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-08-22 22:16:35,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 247 transitions. [2020-08-22 22:16:35,092 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 247 transitions. Word has length 15 [2020-08-22 22:16:35,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:16:35,092 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 247 transitions. [2020-08-22 22:16:35,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 22:16:35,093 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 247 transitions. [2020-08-22 22:16:35,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-22 22:16:35,094 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:16:35,094 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:16:35,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 22:16:35,095 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:16:35,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:16:35,096 INFO L82 PathProgramCache]: Analyzing trace with hash 2028933562, now seen corresponding path program 1 times [2020-08-22 22:16:35,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:16:35,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239112208] [2020-08-22 22:16:35,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:16:35,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:16:35,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:16:35,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:16:35,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:16:35,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239112208] [2020-08-22 22:16:35,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:16:35,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 22:16:35,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750543525] [2020-08-22 22:16:35,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 22:16:35,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:16:35,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 22:16:35,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 22:16:35,183 INFO L87 Difference]: Start difference. First operand 224 states and 247 transitions. Second operand 4 states. [2020-08-22 22:16:35,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:16:35,846 INFO L93 Difference]: Finished difference Result 453 states and 502 transitions. [2020-08-22 22:16:35,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 22:16:35,848 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-08-22 22:16:35,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:16:35,858 INFO L225 Difference]: With dead ends: 453 [2020-08-22 22:16:35,862 INFO L226 Difference]: Without dead ends: 253 [2020-08-22 22:16:35,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 22:16:35,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-08-22 22:16:35,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 226. [2020-08-22 22:16:35,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-08-22 22:16:35,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 249 transitions. [2020-08-22 22:16:35,928 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 249 transitions. Word has length 17 [2020-08-22 22:16:35,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:16:35,929 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 249 transitions. [2020-08-22 22:16:35,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 22:16:35,929 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 249 transitions. [2020-08-22 22:16:35,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 22:16:35,930 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:16:35,931 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:16:35,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 22:16:35,931 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:16:35,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:16:35,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1052511289, now seen corresponding path program 1 times [2020-08-22 22:16:35,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:16:35,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181916950] [2020-08-22 22:16:35,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:16:35,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:16:36,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:16:36,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:16:36,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:16:36,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181916950] [2020-08-22 22:16:36,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:16:36,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 22:16:36,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502105198] [2020-08-22 22:16:36,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 22:16:36,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:16:36,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 22:16:36,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 22:16:36,110 INFO L87 Difference]: Start difference. First operand 226 states and 249 transitions. Second operand 9 states. [2020-08-22 22:16:37,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:16:37,147 INFO L93 Difference]: Finished difference Result 318 states and 355 transitions. [2020-08-22 22:16:37,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 22:16:37,148 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-08-22 22:16:37,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:16:37,151 INFO L225 Difference]: With dead ends: 318 [2020-08-22 22:16:37,151 INFO L226 Difference]: Without dead ends: 313 [2020-08-22 22:16:37,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-08-22 22:16:37,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-08-22 22:16:37,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 231. [2020-08-22 22:16:37,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-08-22 22:16:37,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 254 transitions. [2020-08-22 22:16:37,183 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 254 transitions. Word has length 33 [2020-08-22 22:16:37,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:16:37,184 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 254 transitions. [2020-08-22 22:16:37,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 22:16:37,184 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 254 transitions. [2020-08-22 22:16:37,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-22 22:16:37,188 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:16:37,188 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:16:37,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 22:16:37,189 INFO L427 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:16:37,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:16:37,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1386814406, now seen corresponding path program 1 times [2020-08-22 22:16:37,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:16:37,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35513957] [2020-08-22 22:16:37,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:16:37,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:16:37,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:16:37,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:16:37,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 22:16:37,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35513957] [2020-08-22 22:16:37,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:16:37,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 22:16:37,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455293644] [2020-08-22 22:16:37,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 22:16:37,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:16:37,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 22:16:37,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 22:16:37,338 INFO L87 Difference]: Start difference. First operand 231 states and 254 transitions. Second operand 6 states. [2020-08-22 22:16:38,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:16:38,092 INFO L93 Difference]: Finished difference Result 248 states and 273 transitions. [2020-08-22 22:16:38,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 22:16:38,093 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2020-08-22 22:16:38,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:16:38,095 INFO L225 Difference]: With dead ends: 248 [2020-08-22 22:16:38,097 INFO L226 Difference]: Without dead ends: 244 [2020-08-22 22:16:38,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-08-22 22:16:38,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-08-22 22:16:38,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 229. [2020-08-22 22:16:38,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-08-22 22:16:38,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 251 transitions. [2020-08-22 22:16:38,128 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 251 transitions. Word has length 42 [2020-08-22 22:16:38,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:16:38,128 INFO L479 AbstractCegarLoop]: Abstraction has 229 states and 251 transitions. [2020-08-22 22:16:38,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 22:16:38,129 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 251 transitions. [2020-08-22 22:16:38,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-22 22:16:38,130 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:16:38,130 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:16:38,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 22:16:38,131 INFO L427 AbstractCegarLoop]: === Iteration 5 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:16:38,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:16:38,132 INFO L82 PathProgramCache]: Analyzing trace with hash 527521680, now seen corresponding path program 1 times [2020-08-22 22:16:38,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:16:38,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257424575] [2020-08-22 22:16:38,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:16:38,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:16:38,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:16:38,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:16:38,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 22:16:38,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257424575] [2020-08-22 22:16:38,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:16:38,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 22:16:38,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085435823] [2020-08-22 22:16:38,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 22:16:38,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:16:38,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 22:16:38,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 22:16:38,284 INFO L87 Difference]: Start difference. First operand 229 states and 251 transitions. Second operand 6 states. [2020-08-22 22:16:39,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:16:39,042 INFO L93 Difference]: Finished difference Result 246 states and 270 transitions. [2020-08-22 22:16:39,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 22:16:39,042 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2020-08-22 22:16:39,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:16:39,045 INFO L225 Difference]: With dead ends: 246 [2020-08-22 22:16:39,045 INFO L226 Difference]: Without dead ends: 242 [2020-08-22 22:16:39,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-08-22 22:16:39,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-08-22 22:16:39,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 227. [2020-08-22 22:16:39,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-08-22 22:16:39,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 248 transitions. [2020-08-22 22:16:39,073 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 248 transitions. Word has length 42 [2020-08-22 22:16:39,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:16:39,073 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 248 transitions. [2020-08-22 22:16:39,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 22:16:39,074 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 248 transitions. [2020-08-22 22:16:39,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-22 22:16:39,075 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:16:39,075 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:16:39,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 22:16:39,076 INFO L427 AbstractCegarLoop]: === Iteration 6 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:16:39,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:16:39,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1598586176, now seen corresponding path program 1 times [2020-08-22 22:16:39,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:16:39,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718797997] [2020-08-22 22:16:39,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:16:39,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:16:39,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:16:39,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:16:39,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:16:39,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718797997] [2020-08-22 22:16:39,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:16:39,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 22:16:39,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127337893] [2020-08-22 22:16:39,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 22:16:39,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:16:39,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 22:16:39,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-22 22:16:39,228 INFO L87 Difference]: Start difference. First operand 227 states and 248 transitions. Second operand 10 states. [2020-08-22 22:16:40,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:16:40,396 INFO L93 Difference]: Finished difference Result 299 states and 329 transitions. [2020-08-22 22:16:40,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 22:16:40,397 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2020-08-22 22:16:40,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:16:40,401 INFO L225 Difference]: With dead ends: 299 [2020-08-22 22:16:40,401 INFO L226 Difference]: Without dead ends: 295 [2020-08-22 22:16:40,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-08-22 22:16:40,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-08-22 22:16:40,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 234. [2020-08-22 22:16:40,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-08-22 22:16:40,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 255 transitions. [2020-08-22 22:16:40,433 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 255 transitions. Word has length 46 [2020-08-22 22:16:40,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:16:40,434 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 255 transitions. [2020-08-22 22:16:40,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 22:16:40,434 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 255 transitions. [2020-08-22 22:16:40,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-22 22:16:40,436 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:16:40,436 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:16:40,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 22:16:40,437 INFO L427 AbstractCegarLoop]: === Iteration 7 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:16:40,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:16:40,437 INFO L82 PathProgramCache]: Analyzing trace with hash 180139286, now seen corresponding path program 1 times [2020-08-22 22:16:40,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:16:40,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7389822] [2020-08-22 22:16:40,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:16:40,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:16:40,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:16:40,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:16:40,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:16:40,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7389822] [2020-08-22 22:16:40,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:16:40,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 22:16:40,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782482560] [2020-08-22 22:16:40,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 22:16:40,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:16:40,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 22:16:40,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-22 22:16:40,581 INFO L87 Difference]: Start difference. First operand 234 states and 255 transitions. Second operand 10 states. [2020-08-22 22:16:41,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:16:41,737 INFO L93 Difference]: Finished difference Result 297 states and 326 transitions. [2020-08-22 22:16:41,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 22:16:41,738 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2020-08-22 22:16:41,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:16:41,742 INFO L225 Difference]: With dead ends: 297 [2020-08-22 22:16:41,742 INFO L226 Difference]: Without dead ends: 293 [2020-08-22 22:16:41,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-08-22 22:16:41,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-08-22 22:16:41,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 241. [2020-08-22 22:16:41,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-08-22 22:16:41,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 262 transitions. [2020-08-22 22:16:41,769 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 262 transitions. Word has length 46 [2020-08-22 22:16:41,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:16:41,769 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 262 transitions. [2020-08-22 22:16:41,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 22:16:41,770 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 262 transitions. [2020-08-22 22:16:41,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-22 22:16:41,771 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:16:41,771 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:16:41,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 22:16:41,772 INFO L427 AbstractCegarLoop]: === Iteration 8 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:16:41,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:16:41,772 INFO L82 PathProgramCache]: Analyzing trace with hash 797684937, now seen corresponding path program 1 times [2020-08-22 22:16:41,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:16:41,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781314630] [2020-08-22 22:16:41,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:16:41,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 22:16:41,795 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 22:16:41,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 22:16:41,812 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 22:16:41,848 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 22:16:41,848 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 22:16:41,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 22:16:41,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 10:16:41 BoogieIcfgContainer [2020-08-22 22:16:41,925 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 22:16:41,929 INFO L168 Benchmark]: Toolchain (without parser) took 9934.56 ms. Allocated memory was 137.4 MB in the beginning and 351.3 MB in the end (delta: 213.9 MB). Free memory was 98.4 MB in the beginning and 177.7 MB in the end (delta: -79.3 MB). Peak memory consumption was 134.6 MB. Max. memory is 7.1 GB. [2020-08-22 22:16:41,936 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 137.4 MB. Free memory was 118.6 MB in the beginning and 118.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 22:16:41,937 INFO L168 Benchmark]: CACSL2BoogieTranslator took 747.94 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 98.1 MB in the beginning and 165.4 MB in the end (delta: -67.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. [2020-08-22 22:16:41,938 INFO L168 Benchmark]: Boogie Preprocessor took 114.95 ms. Allocated memory is still 201.3 MB. Free memory was 165.4 MB in the beginning and 161.9 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. [2020-08-22 22:16:41,939 INFO L168 Benchmark]: RCFGBuilder took 1236.04 ms. Allocated memory was 201.3 MB in the beginning and 230.7 MB in the end (delta: 29.4 MB). Free memory was 161.9 MB in the beginning and 199.9 MB in the end (delta: -37.9 MB). Peak memory consumption was 84.5 MB. Max. memory is 7.1 GB. [2020-08-22 22:16:41,943 INFO L168 Benchmark]: TraceAbstraction took 7825.26 ms. Allocated memory was 230.7 MB in the beginning and 351.3 MB in the end (delta: 120.6 MB). Free memory was 198.5 MB in the beginning and 177.7 MB in the end (delta: 20.8 MB). Peak memory consumption was 141.4 MB. Max. memory is 7.1 GB. [2020-08-22 22:16:41,951 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 137.4 MB. Free memory was 118.6 MB in the beginning and 118.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 747.94 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 98.1 MB in the beginning and 165.4 MB in the end (delta: -67.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.95 ms. Allocated memory is still 201.3 MB. Free memory was 165.4 MB in the beginning and 161.9 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1236.04 ms. Allocated memory was 201.3 MB in the beginning and 230.7 MB in the end (delta: 29.4 MB). Free memory was 161.9 MB in the beginning and 199.9 MB in the end (delta: -37.9 MB). Peak memory consumption was 84.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7825.26 ms. Allocated memory was 230.7 MB in the beginning and 351.3 MB in the end (delta: 120.6 MB). Free memory was 198.5 MB in the beginning and 177.7 MB in the end (delta: 20.8 MB). Peak memory consumption was 141.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 554]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L627] struct list *data = ((void *)0); VAL [data={0:0}] [L628] COND TRUE __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, data={0:0}] [L629] struct node *node = malloc(sizeof *node); VAL [data={0:0}, malloc(sizeof *node)={-1:0}, node={-1:0}] [L630] COND FALSE !(!node) VAL [data={0:0}, malloc(sizeof *node)={-1:0}, node={-1:0}] [L632] node->next = node VAL [data={0:0}, malloc(sizeof *node)={-1:0}, node={-1:0}] [L633] node->value = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=2, data={0:0}, malloc(sizeof *node)={-1:0}, node={-1:0}] [L634] struct list *item = malloc(sizeof *item); VAL [data={0:0}, item={-2:0}, malloc(sizeof *item)={-2:0}, malloc(sizeof *node)={-1:0}, node={-1:0}] [L635] COND FALSE !(!item) VAL [data={0:0}, item={-2:0}, malloc(sizeof *item)={-2:0}, malloc(sizeof *node)={-1:0}, node={-1:0}] [L637] item->slist = node VAL [data={0:0}, item={-2:0}, malloc(sizeof *item)={-2:0}, malloc(sizeof *node)={-1:0}, node={-1:0}] [L638] item->next = data VAL [data={0:0}, item={-2:0}, malloc(sizeof *item)={-2:0}, malloc(sizeof *node)={-1:0}, node={-1:0}] [L639] data = item VAL [data={-2:0}, item={-2:0}, malloc(sizeof *item)={-2:0}, malloc(sizeof *node)={-1:0}, node={-1:0}] [L628] COND FALSE !(__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, data={-2:0}, item={-2:0}, malloc(sizeof *item)={-2:0}, malloc(sizeof *node)={-1:0}, node={-1:0}] [L641] COND FALSE !(!data) VAL [data={-2:0}, item={-2:0}, malloc(sizeof *item)={-2:0}, malloc(sizeof *node)={-1:0}, node={-1:0}] [L643] CALL inspect_before(data) VAL [shape={-2:0}] [L604] COND FALSE !(!(shape)) VAL [shape={-2:0}, shape={-2:0}] [L605] shape->next VAL [shape={-2:0}, shape={-2:0}, shape->next={0:0}] [L605] COND FALSE !(shape->next) VAL [shape={-2:0}, shape={-2:0}, shape->next={0:0}] [L611] COND FALSE !(!(shape)) VAL [shape={-2:0}, shape={-2:0}] [L612] EXPR shape->next VAL [shape={-2:0}, shape={-2:0}, shape->next={0:0}] [L612] COND FALSE !(!(shape->next == ((void *)0))) VAL [shape={-2:0}, shape={-2:0}, shape->next={0:0}] [L613] EXPR shape->slist VAL [shape={-2:0}, shape={-2:0}, shape->slist={-1:0}] [L613] COND FALSE !(!(shape->slist)) VAL [shape={-2:0}, shape={-2:0}, shape->slist={-1:0}] [L614] EXPR shape->slist VAL [shape={-2:0}, shape={-2:0}, shape->slist={-1:0}] [L614] EXPR shape->slist->next VAL [shape={-2:0}, shape={-2:0}, shape->slist={-1:0}, shape->slist->next={-1:0}] [L614] COND TRUE !(shape->slist->next == ((void *)0)) VAL [shape={-2:0}, shape={-2:0}, shape->slist={-1:0}, shape->slist->next={-1:0}] [L614] CALL fail() [L554] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 258 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.6s, OverallIterations: 8, TraceHistogramMax: 2, AutomataDifference: 6.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1648 SDtfs, 1803 SDslu, 2737 SDs, 0 SdLazy, 4465 SolverSat, 226 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 87 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=248occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 7 MinimizatonAttempts, 280 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 293 NumberOfCodeBlocks, 293 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 234 ConstructedInterpolants, 0 QuantifiedInterpolants, 36318 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 10/10 InterpolantCoveringCapability, 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...