/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 --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 0.2.0-7d8eed3 [2020-11-07 05:14:15,995 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 05:14:16,000 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 05:14:16,061 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 05:14:16,062 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 05:14:16,067 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 05:14:16,071 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 05:14:16,079 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 05:14:16,082 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 05:14:16,089 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 05:14:16,090 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 05:14:16,092 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 05:14:16,092 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 05:14:16,096 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 05:14:16,098 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 05:14:16,100 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 05:14:16,101 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 05:14:16,104 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 05:14:16,132 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 05:14:16,140 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 05:14:16,142 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 05:14:16,143 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 05:14:16,145 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 05:14:16,147 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 05:14:16,156 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-07 05:14:16,156 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-07 05:14:16,157 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-07 05:14:16,159 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-07 05:14:16,160 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-07 05:14:16,161 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-07 05:14:16,161 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-07 05:14:16,162 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-07 05:14:16,164 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-07 05:14:16,165 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-07 05:14:16,166 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-07 05:14:16,166 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-07 05:14:16,167 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-07 05:14:16,168 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-07 05:14:16,168 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 05:14:16,169 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 05:14:16,169 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 05:14:16,171 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 05:14:16,193 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 05:14:16,194 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 05:14:16,199 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 05:14:16,199 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 05:14:16,200 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 05:14:16,200 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 05:14:16,200 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 05:14:16,200 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 05:14:16,200 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 05:14:16,201 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 05:14:16,202 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 05:14:16,202 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 05:14:16,202 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 05:14:16,203 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 05:14:16,203 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 05:14:16,203 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 05:14:16,203 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 05:14:16,203 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 05:14:16,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 05:14:16,204 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 05:14:16,204 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 05:14:16,204 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 05:14:16,204 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 05:14:16,603 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 05:14:16,645 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 05:14:16,648 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 05:14:16,650 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 05:14:16,651 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 05:14:16,652 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/merge_sort-1.i [2020-11-07 05:14:16,734 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f97ba17e/f3daf3eced724e388728cca35c96e909/FLAG27d6e88f4 [2020-11-07 05:14:17,528 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 05:14:17,529 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/merge_sort-1.i [2020-11-07 05:14:17,550 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f97ba17e/f3daf3eced724e388728cca35c96e909/FLAG27d6e88f4 [2020-11-07 05:14:17,734 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f97ba17e/f3daf3eced724e388728cca35c96e909 [2020-11-07 05:14:17,738 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 05:14:17,746 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 05:14:17,752 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 05:14:17,753 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 05:14:17,758 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 05:14:17,758 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 05:14:17" (1/1) ... [2020-11-07 05:14:17,763 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38843ec1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:14:17, skipping insertion in model container [2020-11-07 05:14:17,763 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 05:14:17" (1/1) ... [2020-11-07 05:14:17,772 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 05:14:17,850 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 05:14:18,402 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 05:14:18,420 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 05:14:18,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 05:14:18,612 INFO L208 MainTranslator]: Completed translation [2020-11-07 05:14:18,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:14:18 WrapperNode [2020-11-07 05:14:18,615 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 05:14:18,616 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 05:14:18,616 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 05:14:18,616 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 05:14:18,662 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:14:18" (1/1) ... [2020-11-07 05:14:18,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:14:18" (1/1) ... [2020-11-07 05:14:18,697 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:14:18" (1/1) ... [2020-11-07 05:14:18,698 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:14:18" (1/1) ... [2020-11-07 05:14:18,735 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:14:18" (1/1) ... [2020-11-07 05:14:18,745 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:14:18" (1/1) ... [2020-11-07 05:14:18,751 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:14:18" (1/1) ... [2020-11-07 05:14:18,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 05:14:18,761 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 05:14:18,761 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 05:14:18,761 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 05:14:18,762 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:14:18" (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 [2020-11-07 05:14:18,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 05:14:18,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 05:14:18,841 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 05:14:18,841 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-11-07 05:14:18,841 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-11-07 05:14:18,842 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-11-07 05:14:18,842 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2020-11-07 05:14:18,842 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_pair [2020-11-07 05:14:18,842 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_sort_core [2020-11-07 05:14:18,842 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_before [2020-11-07 05:14:18,843 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_after [2020-11-07 05:14:18,843 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 05:14:18,843 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 05:14:18,843 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 05:14:18,843 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-07 05:14:18,844 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-07 05:14:18,844 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 05:14:18,844 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 05:14:18,844 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-11-07 05:14:18,844 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-11-07 05:14:18,845 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-11-07 05:14:18,845 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-11-07 05:14:18,845 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-11-07 05:14:18,845 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-11-07 05:14:18,845 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-11-07 05:14:18,846 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-11-07 05:14:18,846 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-11-07 05:14:18,846 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-11-07 05:14:18,846 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-11-07 05:14:18,846 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-11-07 05:14:18,846 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-11-07 05:14:18,847 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-11-07 05:14:18,847 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-11-07 05:14:18,847 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-11-07 05:14:18,847 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-11-07 05:14:18,847 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-11-07 05:14:18,848 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-11-07 05:14:18,848 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-11-07 05:14:18,848 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-11-07 05:14:18,848 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-11-07 05:14:18,848 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-11-07 05:14:18,849 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-11-07 05:14:18,849 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-11-07 05:14:18,849 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-11-07 05:14:18,849 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-11-07 05:14:18,849 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-11-07 05:14:18,849 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-11-07 05:14:18,850 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-11-07 05:14:18,850 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-11-07 05:14:18,850 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-11-07 05:14:18,850 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-11-07 05:14:18,850 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-11-07 05:14:18,851 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-11-07 05:14:18,851 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-11-07 05:14:18,851 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-11-07 05:14:18,851 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-11-07 05:14:18,851 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-11-07 05:14:18,851 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-11-07 05:14:18,852 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-11-07 05:14:18,852 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-11-07 05:14:18,852 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-11-07 05:14:18,852 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-11-07 05:14:18,852 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-11-07 05:14:18,853 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-11-07 05:14:18,853 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-11-07 05:14:18,853 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-11-07 05:14:18,853 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-11-07 05:14:18,853 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-11-07 05:14:18,854 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-11-07 05:14:18,854 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-11-07 05:14:18,854 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-07 05:14:18,854 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-11-07 05:14:18,854 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-11-07 05:14:18,855 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-07 05:14:18,855 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-11-07 05:14:18,855 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-11-07 05:14:18,855 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-11-07 05:14:18,855 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-11-07 05:14:18,855 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-11-07 05:14:18,856 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-11-07 05:14:18,856 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-11-07 05:14:18,856 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-11-07 05:14:18,856 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-11-07 05:14:18,856 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-11-07 05:14:18,857 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-11-07 05:14:18,857 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-11-07 05:14:18,857 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-11-07 05:14:18,857 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-11-07 05:14:18,857 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-11-07 05:14:18,857 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-11-07 05:14:18,858 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-11-07 05:14:18,858 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-11-07 05:14:18,858 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-11-07 05:14:18,858 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-11-07 05:14:18,858 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-11-07 05:14:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-11-07 05:14:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-11-07 05:14:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-11-07 05:14:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-11-07 05:14:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-11-07 05:14:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-11-07 05:14:18,860 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-11-07 05:14:18,860 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-11-07 05:14:18,860 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-11-07 05:14:18,860 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-11-07 05:14:18,860 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-11-07 05:14:18,860 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-11-07 05:14:18,861 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-11-07 05:14:18,861 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-11-07 05:14:18,861 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-11-07 05:14:18,861 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-11-07 05:14:18,861 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-11-07 05:14:18,861 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-11-07 05:14:18,861 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-11-07 05:14:18,861 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-11-07 05:14:18,862 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-11-07 05:14:18,862 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-11-07 05:14:18,862 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-11-07 05:14:18,862 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-11-07 05:14:18,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 05:14:18,862 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-11-07 05:14:18,862 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2020-11-07 05:14:18,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-07 05:14:18,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-07 05:14:18,863 INFO L130 BoogieDeclarations]: Found specification of procedure merge_pair [2020-11-07 05:14:18,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 05:14:18,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 05:14:18,863 INFO L130 BoogieDeclarations]: Found specification of procedure seq_sort_core [2020-11-07 05:14:18,864 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_before [2020-11-07 05:14:18,864 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_after [2020-11-07 05:14:18,864 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 05:14:18,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-07 05:14:18,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 05:14:18,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 05:14:18,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 05:14:18,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 05:14:20,092 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 05:14:20,092 INFO L298 CfgBuilder]: Removed 33 assume(true) statements. [2020-11-07 05:14:20,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 05:14:20 BoogieIcfgContainer [2020-11-07 05:14:20,095 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 05:14:20,097 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 05:14:20,097 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 05:14:20,101 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 05:14:20,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 05:14:17" (1/3) ... [2020-11-07 05:14:20,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13efbc77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 05:14:20, skipping insertion in model container [2020-11-07 05:14:20,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:14:18" (2/3) ... [2020-11-07 05:14:20,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13efbc77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 05:14:20, skipping insertion in model container [2020-11-07 05:14:20,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 05:14:20" (3/3) ... [2020-11-07 05:14:20,104 INFO L111 eAbstractionObserver]: Analyzing ICFG merge_sort-1.i [2020-11-07 05:14:20,121 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 05:14:20,126 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 05:14:20,139 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 05:14:20,166 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 05:14:20,166 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 05:14:20,166 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 05:14:20,166 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 05:14:20,167 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 05:14:20,167 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 05:14:20,167 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 05:14:20,167 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 05:14:20,193 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states. [2020-11-07 05:14:20,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-07 05:14:20,203 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:14:20,204 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] [2020-11-07 05:14:20,204 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:14:20,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:14:20,211 INFO L82 PathProgramCache]: Analyzing trace with hash 946346925, now seen corresponding path program 1 times [2020-11-07 05:14:20,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:14:20,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83642116] [2020-11-07 05:14:20,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:14:20,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:14:20,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:14:20,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:14:20,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:14:20,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83642116] [2020-11-07 05:14:20,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:14:20,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 05:14:20,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037148411] [2020-11-07 05:14:20,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 05:14:20,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:14:20,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 05:14:20,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 05:14:20,469 INFO L87 Difference]: Start difference. First operand 258 states. Second operand 3 states. [2020-11-07 05:14:20,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:14:20,997 INFO L93 Difference]: Finished difference Result 533 states and 704 transitions. [2020-11-07 05:14:20,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 05:14:21,000 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-11-07 05:14:21,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:14:21,015 INFO L225 Difference]: With dead ends: 533 [2020-11-07 05:14:21,015 INFO L226 Difference]: Without dead ends: 258 [2020-11-07 05:14:21,024 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 [2020-11-07 05:14:21,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-11-07 05:14:21,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 230. [2020-11-07 05:14:21,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-11-07 05:14:21,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 253 transitions. [2020-11-07 05:14:21,111 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 253 transitions. Word has length 21 [2020-11-07 05:14:21,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:14:21,111 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 253 transitions. [2020-11-07 05:14:21,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 05:14:21,112 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 253 transitions. [2020-11-07 05:14:21,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-07 05:14:21,113 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:14:21,113 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, 1, 1] [2020-11-07 05:14:21,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 05:14:21,114 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:14:21,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:14:21,115 INFO L82 PathProgramCache]: Analyzing trace with hash -262869876, now seen corresponding path program 1 times [2020-11-07 05:14:21,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:14:21,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705625945] [2020-11-07 05:14:21,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:14:21,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:14:21,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:14:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:14:21,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:14:21,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705625945] [2020-11-07 05:14:21,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:14:21,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 05:14:21,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128789170] [2020-11-07 05:14:21,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 05:14:21,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:14:21,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 05:14:21,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:14:21,220 INFO L87 Difference]: Start difference. First operand 230 states and 253 transitions. Second operand 4 states. [2020-11-07 05:14:21,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:14:21,871 INFO L93 Difference]: Finished difference Result 461 states and 510 transitions. [2020-11-07 05:14:21,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 05:14:21,872 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-11-07 05:14:21,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:14:21,876 INFO L225 Difference]: With dead ends: 461 [2020-11-07 05:14:21,876 INFO L226 Difference]: Without dead ends: 259 [2020-11-07 05:14:21,878 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 [2020-11-07 05:14:21,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-11-07 05:14:21,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 232. [2020-11-07 05:14:21,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-11-07 05:14:21,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 255 transitions. [2020-11-07 05:14:21,910 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 255 transitions. Word has length 23 [2020-11-07 05:14:21,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:14:21,910 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 255 transitions. [2020-11-07 05:14:21,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 05:14:21,911 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 255 transitions. [2020-11-07 05:14:21,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-07 05:14:21,912 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:14:21,912 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] [2020-11-07 05:14:21,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 05:14:21,913 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:14:21,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:14:21,913 INFO L82 PathProgramCache]: Analyzing trace with hash 981297497, now seen corresponding path program 1 times [2020-11-07 05:14:21,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:14:21,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806950654] [2020-11-07 05:14:21,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:14:21,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:14:22,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:14:22,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:14:22,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:14:22,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806950654] [2020-11-07 05:14:22,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:14:22,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 05:14:22,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637136303] [2020-11-07 05:14:22,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 05:14:22,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:14:22,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 05:14:22,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-07 05:14:22,099 INFO L87 Difference]: Start difference. First operand 232 states and 255 transitions. Second operand 8 states. [2020-11-07 05:14:23,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:14:23,247 INFO L93 Difference]: Finished difference Result 326 states and 363 transitions. [2020-11-07 05:14:23,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 05:14:23,248 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2020-11-07 05:14:23,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:14:23,251 INFO L225 Difference]: With dead ends: 326 [2020-11-07 05:14:23,251 INFO L226 Difference]: Without dead ends: 319 [2020-11-07 05:14:23,255 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 [2020-11-07 05:14:23,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-11-07 05:14:23,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 237. [2020-11-07 05:14:23,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-11-07 05:14:23,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 260 transitions. [2020-11-07 05:14:23,301 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 260 transitions. Word has length 39 [2020-11-07 05:14:23,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:14:23,302 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 260 transitions. [2020-11-07 05:14:23,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 05:14:23,302 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 260 transitions. [2020-11-07 05:14:23,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-07 05:14:23,303 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:14:23,304 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] [2020-11-07 05:14:23,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 05:14:23,304 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:14:23,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:14:23,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1272473326, now seen corresponding path program 1 times [2020-11-07 05:14:23,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:14:23,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182854077] [2020-11-07 05:14:23,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:14:23,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:14:23,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:14:23,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:14:23,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-07 05:14:23,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182854077] [2020-11-07 05:14:23,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:14:23,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 05:14:23,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427520720] [2020-11-07 05:14:23,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 05:14:23,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:14:23,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 05:14:23,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 05:14:23,516 INFO L87 Difference]: Start difference. First operand 237 states and 260 transitions. Second operand 6 states. [2020-11-07 05:14:24,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:14:24,521 INFO L93 Difference]: Finished difference Result 256 states and 281 transitions. [2020-11-07 05:14:24,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 05:14:24,522 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 48 [2020-11-07 05:14:24,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:14:24,525 INFO L225 Difference]: With dead ends: 256 [2020-11-07 05:14:24,525 INFO L226 Difference]: Without dead ends: 250 [2020-11-07 05:14:24,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-11-07 05:14:24,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-11-07 05:14:24,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 235. [2020-11-07 05:14:24,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-11-07 05:14:24,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 257 transitions. [2020-11-07 05:14:24,576 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 257 transitions. Word has length 48 [2020-11-07 05:14:24,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:14:24,577 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 257 transitions. [2020-11-07 05:14:24,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 05:14:24,577 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 257 transitions. [2020-11-07 05:14:24,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-07 05:14:24,581 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:14:24,582 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] [2020-11-07 05:14:24,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 05:14:24,582 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:14:24,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:14:24,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1591518012, now seen corresponding path program 1 times [2020-11-07 05:14:24,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:14:24,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779148716] [2020-11-07 05:14:24,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:14:24,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:14:24,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:14:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:14:24,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-07 05:14:24,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779148716] [2020-11-07 05:14:24,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:14:24,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 05:14:24,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480101020] [2020-11-07 05:14:24,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 05:14:24,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:14:24,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 05:14:24,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 05:14:24,765 INFO L87 Difference]: Start difference. First operand 235 states and 257 transitions. Second operand 6 states. [2020-11-07 05:14:25,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:14:25,665 INFO L93 Difference]: Finished difference Result 254 states and 278 transitions. [2020-11-07 05:14:25,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 05:14:25,666 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 48 [2020-11-07 05:14:25,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:14:25,668 INFO L225 Difference]: With dead ends: 254 [2020-11-07 05:14:25,668 INFO L226 Difference]: Without dead ends: 248 [2020-11-07 05:14:25,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-11-07 05:14:25,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-11-07 05:14:25,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 233. [2020-11-07 05:14:25,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-11-07 05:14:25,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 254 transitions. [2020-11-07 05:14:25,700 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 254 transitions. Word has length 48 [2020-11-07 05:14:25,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:14:25,700 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 254 transitions. [2020-11-07 05:14:25,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 05:14:25,701 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 254 transitions. [2020-11-07 05:14:25,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-07 05:14:25,702 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:14:25,702 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] [2020-11-07 05:14:25,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 05:14:25,702 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:14:25,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:14:25,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1804582388, now seen corresponding path program 1 times [2020-11-07 05:14:25,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:14:25,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482689522] [2020-11-07 05:14:25,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:14:25,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:14:25,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:14:25,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:14:25,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:14:25,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482689522] [2020-11-07 05:14:25,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:14:25,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-11-07 05:14:25,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572657638] [2020-11-07 05:14:25,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-07 05:14:25,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:14:25,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-07 05:14:25,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-11-07 05:14:25,913 INFO L87 Difference]: Start difference. First operand 233 states and 254 transitions. Second operand 11 states. [2020-11-07 05:14:27,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:14:27,517 INFO L93 Difference]: Finished difference Result 307 states and 337 transitions. [2020-11-07 05:14:27,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-07 05:14:27,518 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-11-07 05:14:27,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:14:27,520 INFO L225 Difference]: With dead ends: 307 [2020-11-07 05:14:27,521 INFO L226 Difference]: Without dead ends: 301 [2020-11-07 05:14:27,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-11-07 05:14:27,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-11-07 05:14:27,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 240. [2020-11-07 05:14:27,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-11-07 05:14:27,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 261 transitions. [2020-11-07 05:14:27,564 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 261 transitions. Word has length 52 [2020-11-07 05:14:27,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:14:27,565 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 261 transitions. [2020-11-07 05:14:27,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-07 05:14:27,565 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 261 transitions. [2020-11-07 05:14:27,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-07 05:14:27,570 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:14:27,571 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] [2020-11-07 05:14:27,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 05:14:27,571 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:14:27,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:14:27,579 INFO L82 PathProgramCache]: Analyzing trace with hash 181753930, now seen corresponding path program 1 times [2020-11-07 05:14:27,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:14:27,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144378339] [2020-11-07 05:14:27,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:14:27,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:14:27,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:14:27,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:14:27,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:14:27,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144378339] [2020-11-07 05:14:27,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:14:27,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-11-07 05:14:27,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688711591] [2020-11-07 05:14:27,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-07 05:14:27,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:14:27,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-07 05:14:27,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-11-07 05:14:27,755 INFO L87 Difference]: Start difference. First operand 240 states and 261 transitions. Second operand 11 states. [2020-11-07 05:14:29,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:14:29,291 INFO L93 Difference]: Finished difference Result 305 states and 334 transitions. [2020-11-07 05:14:29,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-07 05:14:29,291 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-11-07 05:14:29,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:14:29,294 INFO L225 Difference]: With dead ends: 305 [2020-11-07 05:14:29,294 INFO L226 Difference]: Without dead ends: 299 [2020-11-07 05:14:29,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-11-07 05:14:29,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-11-07 05:14:29,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 247. [2020-11-07 05:14:29,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-11-07 05:14:29,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 268 transitions. [2020-11-07 05:14:29,333 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 268 transitions. Word has length 52 [2020-11-07 05:14:29,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:14:29,334 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 268 transitions. [2020-11-07 05:14:29,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-07 05:14:29,334 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 268 transitions. [2020-11-07 05:14:29,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-07 05:14:29,335 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:14:29,335 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, 1, 1] [2020-11-07 05:14:29,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 05:14:29,336 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:14:29,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:14:29,336 INFO L82 PathProgramCache]: Analyzing trace with hash -236090755, now seen corresponding path program 1 times [2020-11-07 05:14:29,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:14:29,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012593961] [2020-11-07 05:14:29,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:14:29,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 05:14:29,364 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 05:14:29,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 05:14:29,387 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 05:14:29,439 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 05:14:29,440 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 05:14:29,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 05:14:29,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 05:14:29 BoogieIcfgContainer [2020-11-07 05:14:29,517 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 05:14:29,520 INFO L168 Benchmark]: Toolchain (without parser) took 11777.93 ms. Allocated memory was 164.6 MB in the beginning and 293.6 MB in the end (delta: 129.0 MB). Free memory was 139.9 MB in the beginning and 223.9 MB in the end (delta: -84.0 MB). Peak memory consumption was 46.4 MB. Max. memory is 8.0 GB. [2020-11-07 05:14:29,521 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 164.6 MB. Free memory was 139.1 MB in the beginning and 139.0 MB in the end (delta: 117.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 05:14:29,521 INFO L168 Benchmark]: CACSL2BoogieTranslator took 862.58 ms. Allocated memory is still 164.6 MB. Free memory was 139.4 MB in the beginning and 146.3 MB in the end (delta: -6.9 MB). Peak memory consumption was 27.6 MB. Max. memory is 8.0 GB. [2020-11-07 05:14:29,522 INFO L168 Benchmark]: Boogie Preprocessor took 144.11 ms. Allocated memory is still 164.6 MB. Free memory was 146.3 MB in the beginning and 143.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-11-07 05:14:29,523 INFO L168 Benchmark]: RCFGBuilder took 1334.02 ms. Allocated memory is still 164.6 MB. Free memory was 142.6 MB in the beginning and 124.1 MB in the end (delta: 18.5 MB). Peak memory consumption was 59.9 MB. Max. memory is 8.0 GB. [2020-11-07 05:14:29,524 INFO L168 Benchmark]: TraceAbstraction took 9420.40 ms. Allocated memory was 164.6 MB in the beginning and 293.6 MB in the end (delta: 129.0 MB). Free memory was 124.1 MB in the beginning and 223.9 MB in the end (delta: -99.8 MB). Peak memory consumption was 29.2 MB. Max. memory is 8.0 GB. [2020-11-07 05:14:29,528 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 164.6 MB. Free memory was 139.1 MB in the beginning and 139.0 MB in the end (delta: 117.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 862.58 ms. Allocated memory is still 164.6 MB. Free memory was 139.4 MB in the beginning and 146.3 MB in the end (delta: -6.9 MB). Peak memory consumption was 27.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 144.11 ms. Allocated memory is still 164.6 MB. Free memory was 146.3 MB in the beginning and 143.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1334.02 ms. Allocated memory is still 164.6 MB. Free memory was 142.6 MB in the beginning and 124.1 MB in the end (delta: 18.5 MB). Peak memory consumption was 59.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 9420.40 ms. Allocated memory was 164.6 MB in the beginning and 293.6 MB in the end (delta: 129.0 MB). Free memory was 124.1 MB in the beginning and 223.9 MB in the end (delta: -99.8 MB). Peak memory consumption was 29.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L638] struct list *data = ((void *)0); VAL [data={0:0}] [L639] COND TRUE __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, data={0:0}] [L640] struct node *node = malloc(sizeof *node); VAL [data={0:0}, malloc(sizeof *node)={-1:0}, node={-1:0}] [L641] COND FALSE !(!node) VAL [data={0:0}, malloc(sizeof *node)={-1:0}, node={-1:0}] [L643] node->next = node VAL [data={0:0}, malloc(sizeof *node)={-1:0}, node={-1:0}] [L644] node->value = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-2, data={0:0}, malloc(sizeof *node)={-1:0}, node={-1:0}] [L645] struct list *item = malloc(sizeof *item); VAL [data={0:0}, item={-3:0}, malloc(sizeof *item)={-3:0}, malloc(sizeof *node)={-1:0}, node={-1:0}] [L646] COND FALSE !(!item) VAL [data={0:0}, item={-3:0}, malloc(sizeof *item)={-3:0}, malloc(sizeof *node)={-1:0}, node={-1:0}] [L648] item->slist = node VAL [data={0:0}, item={-3:0}, malloc(sizeof *item)={-3:0}, malloc(sizeof *node)={-1:0}, node={-1:0}] [L649] item->next = data VAL [data={0:0}, item={-3:0}, malloc(sizeof *item)={-3:0}, malloc(sizeof *node)={-1:0}, node={-1:0}] [L650] data = item VAL [data={-3:0}, item={-3:0}, malloc(sizeof *item)={-3:0}, malloc(sizeof *node)={-1:0}, node={-1:0}] [L639] COND FALSE !(__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, data={-3:0}, item={-3:0}, malloc(sizeof *item)={-3:0}, malloc(sizeof *node)={-1:0}, node={-1:0}] [L652] COND FALSE !(!data) VAL [data={-3:0}, item={-3:0}, malloc(sizeof *item)={-3:0}, malloc(sizeof *node)={-1:0}, node={-1:0}] [L654] CALL inspect_before(data) VAL [shape={-3:0}] [L615] COND FALSE !(!(shape)) VAL [shape={-3:0}, shape={-3:0}] [L616] shape->next VAL [shape={-3:0}, shape={-3:0}, shape->next={0:0}] [L616] COND FALSE !(shape->next) VAL [shape={-3:0}, shape={-3:0}, shape->next={0:0}] [L622] COND FALSE !(!(shape)) VAL [shape={-3:0}, shape={-3:0}] [L623] EXPR shape->next VAL [shape={-3:0}, shape={-3:0}, shape->next={0:0}] [L623] COND FALSE !(!(shape->next == ((void *)0))) VAL [shape={-3:0}, shape={-3:0}, shape->next={0:0}] [L624] EXPR shape->slist VAL [shape={-3:0}, shape={-3:0}, shape->slist={-1:0}] [L624] COND FALSE !(!(shape->slist)) VAL [shape={-3:0}, shape={-3:0}, shape->slist={-1:0}] [L625] EXPR shape->slist VAL [shape={-3:0}, shape={-3:0}, shape->slist={-1:0}] [L625] EXPR shape->slist->next VAL [shape={-3:0}, shape={-3:0}, shape->slist={-1:0}, shape->slist->next={-1:0}] [L625] COND TRUE !(shape->slist->next == ((void *)0)) VAL [shape={-3:0}, shape={-3:0}, shape->slist={-1:0}, shape->slist->next={-1:0}] [L625] CALL fail() [L565] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "merge_sort-1.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 268 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.2s, OverallIterations: 8, TraceHistogramMax: 2, AutomataDifference: 7.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1690 SDtfs, 1837 SDslu, 2961 SDs, 0 SdLazy, 4642 SolverSat, 241 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 90 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=258occurred 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: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 341 NumberOfCodeBlocks, 341 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 276 ConstructedInterpolants, 0 QuantifiedInterpolants, 47404 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...