/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/heap-manipulation/merge_sort-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:27:05,094 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:27:05,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:27:05,135 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:27:05,136 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:27:05,137 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:27:05,139 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:27:05,142 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:27:05,145 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:27:05,146 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:27:05,147 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:27:05,149 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:27:05,150 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:27:05,152 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:27:05,153 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:27:05,155 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:27:05,157 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:27:05,158 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:27:05,173 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:27:05,176 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:27:05,179 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:27:05,180 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:27:05,182 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:27:05,183 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:27:05,187 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-06 22:27:05,187 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-06 22:27:05,188 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-06 22:27:05,189 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-06 22:27:05,190 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-06 22:27:05,191 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-06 22:27:05,191 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-06 22:27:05,192 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-06 22:27:05,193 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-06 22:27:05,194 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-06 22:27:05,196 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-06 22:27:05,196 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-06 22:27:05,197 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-06 22:27:05,198 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-06 22:27:05,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:27:05,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:27:05,200 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:27:05,201 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 22:27:05,233 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:27:05,233 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:27:05,235 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:27:05,235 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:27:05,236 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:27:05,236 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:27:05,236 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:27:05,236 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:27:05,237 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:27:05,237 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:27:05,237 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:27:05,238 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:27:05,238 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:27:05,238 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:27:05,238 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:27:05,239 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:27:05,239 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:27:05,239 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:27:05,240 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:27:05,240 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:27:05,240 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:27:05,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:27:05,241 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:27:05,241 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:27:05,242 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:27:05,242 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:27:05,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:27:05,242 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:27:05,243 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:27:05,243 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:27:05,617 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:27:05,669 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:27:05,672 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:27:05,674 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:27:05,674 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:27:05,675 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/merge_sort-1.i [2020-11-06 22:27:05,778 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e1e8c524/0076c9e87e6c44c4af7a378c427e8f32/FLAG40241594a [2020-11-06 22:27:06,443 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:27:06,444 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/merge_sort-1.i [2020-11-06 22:27:06,464 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e1e8c524/0076c9e87e6c44c4af7a378c427e8f32/FLAG40241594a [2020-11-06 22:27:06,714 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e1e8c524/0076c9e87e6c44c4af7a378c427e8f32 [2020-11-06 22:27:06,717 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:27:06,725 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:27:06,729 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:27:06,729 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:27:06,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:27:06,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:27:06" (1/1) ... [2020-11-06 22:27:06,739 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21f0cc9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:06, skipping insertion in model container [2020-11-06 22:27:06,739 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:27:06" (1/1) ... [2020-11-06 22:27:06,748 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:27:06,816 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:27:07,212 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:27:07,232 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:27:07,337 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:27:07,422 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:27:07,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:07 WrapperNode [2020-11-06 22:27:07,423 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:27:07,424 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:27:07,424 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:27:07,424 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:27:07,438 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:07" (1/1) ... [2020-11-06 22:27:07,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:07" (1/1) ... [2020-11-06 22:27:07,456 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:07" (1/1) ... [2020-11-06 22:27:07,456 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:07" (1/1) ... [2020-11-06 22:27:07,504 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:07" (1/1) ... [2020-11-06 22:27:07,526 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:07" (1/1) ... [2020-11-06 22:27:07,540 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:07" (1/1) ... [2020-11-06 22:27:07,558 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:27:07,559 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:27:07,559 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:27:07,562 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:27:07,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:07" (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 [2020-11-06 22:27:07,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:27:07,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:27:07,643 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:27:07,643 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-11-06 22:27:07,643 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-11-06 22:27:07,644 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-11-06 22:27:07,644 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2020-11-06 22:27:07,644 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_pair [2020-11-06 22:27:07,644 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_sort_core [2020-11-06 22:27:07,644 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_before [2020-11-06 22:27:07,644 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_after [2020-11-06 22:27:07,645 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:27:07,645 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:27:07,645 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:27:07,645 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-06 22:27:07,645 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-06 22:27:07,646 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:27:07,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:27:07,646 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-11-06 22:27:07,646 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-11-06 22:27:07,646 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-11-06 22:27:07,646 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-11-06 22:27:07,647 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-11-06 22:27:07,647 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-11-06 22:27:07,647 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-11-06 22:27:07,647 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-11-06 22:27:07,647 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-11-06 22:27:07,647 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-11-06 22:27:07,648 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-11-06 22:27:07,648 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-11-06 22:27:07,648 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-11-06 22:27:07,648 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-11-06 22:27:07,648 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-11-06 22:27:07,648 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-11-06 22:27:07,649 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-11-06 22:27:07,649 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-11-06 22:27:07,649 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-11-06 22:27:07,649 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-11-06 22:27:07,649 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-11-06 22:27:07,649 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-11-06 22:27:07,650 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-11-06 22:27:07,650 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-11-06 22:27:07,650 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-11-06 22:27:07,650 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-11-06 22:27:07,650 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-11-06 22:27:07,650 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-11-06 22:27:07,650 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-11-06 22:27:07,651 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-11-06 22:27:07,651 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-11-06 22:27:07,651 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-11-06 22:27:07,651 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-11-06 22:27:07,651 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-11-06 22:27:07,651 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-11-06 22:27:07,652 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-11-06 22:27:07,652 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-11-06 22:27:07,652 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-11-06 22:27:07,652 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-11-06 22:27:07,652 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-11-06 22:27:07,652 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-11-06 22:27:07,653 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-11-06 22:27:07,653 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-11-06 22:27:07,653 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-11-06 22:27:07,653 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-11-06 22:27:07,653 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-11-06 22:27:07,653 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-11-06 22:27:07,654 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-11-06 22:27:07,654 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-11-06 22:27:07,654 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-11-06 22:27:07,654 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-11-06 22:27:07,654 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-11-06 22:27:07,654 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-06 22:27:07,655 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-11-06 22:27:07,655 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-11-06 22:27:07,655 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-06 22:27:07,655 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-11-06 22:27:07,655 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-11-06 22:27:07,655 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-11-06 22:27:07,656 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-11-06 22:27:07,656 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-11-06 22:27:07,656 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-11-06 22:27:07,656 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-11-06 22:27:07,656 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-11-06 22:27:07,657 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-11-06 22:27:07,657 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-11-06 22:27:07,657 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-11-06 22:27:07,657 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-11-06 22:27:07,657 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-11-06 22:27:07,657 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-11-06 22:27:07,658 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-11-06 22:27:07,658 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-11-06 22:27:07,658 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-11-06 22:27:07,658 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-11-06 22:27:07,658 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-11-06 22:27:07,658 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-11-06 22:27:07,659 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-11-06 22:27:07,659 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-11-06 22:27:07,659 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-11-06 22:27:07,659 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-11-06 22:27:07,659 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-11-06 22:27:07,659 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-11-06 22:27:07,660 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-11-06 22:27:07,660 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-11-06 22:27:07,660 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-11-06 22:27:07,660 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-11-06 22:27:07,660 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-11-06 22:27:07,660 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-11-06 22:27:07,660 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-11-06 22:27:07,661 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-11-06 22:27:07,661 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-11-06 22:27:07,661 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-11-06 22:27:07,661 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-11-06 22:27:07,661 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-11-06 22:27:07,661 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-11-06 22:27:07,662 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-11-06 22:27:07,662 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-11-06 22:27:07,662 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-11-06 22:27:07,662 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-11-06 22:27:07,662 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-11-06 22:27:07,662 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-11-06 22:27:07,663 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:27:07,663 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-11-06 22:27:07,663 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2020-11-06 22:27:07,663 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-06 22:27:07,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-06 22:27:07,664 INFO L130 BoogieDeclarations]: Found specification of procedure merge_pair [2020-11-06 22:27:07,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:27:07,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:27:07,664 INFO L130 BoogieDeclarations]: Found specification of procedure seq_sort_core [2020-11-06 22:27:07,664 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_before [2020-11-06 22:27:07,664 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_after [2020-11-06 22:27:07,664 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:27:07,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-06 22:27:07,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:27:07,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:27:07,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:27:07,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:27:08,666 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:27:08,666 INFO L298 CfgBuilder]: Removed 33 assume(true) statements. [2020-11-06 22:27:08,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:27:08 BoogieIcfgContainer [2020-11-06 22:27:08,668 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:27:08,670 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:27:08,670 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:27:08,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:27:08,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:27:06" (1/3) ... [2020-11-06 22:27:08,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fc5536c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:27:08, skipping insertion in model container [2020-11-06 22:27:08,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:07" (2/3) ... [2020-11-06 22:27:08,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fc5536c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:27:08, skipping insertion in model container [2020-11-06 22:27:08,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:27:08" (3/3) ... [2020-11-06 22:27:08,678 INFO L111 eAbstractionObserver]: Analyzing ICFG merge_sort-1.i [2020-11-06 22:27:08,694 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:27:08,698 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:27:08,711 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:27:08,739 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:27:08,739 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:27:08,739 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:27:08,740 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:27:08,740 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:27:08,740 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:27:08,740 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:27:08,740 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:27:08,761 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states. [2020-11-06 22:27:08,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-06 22:27:08,768 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:27:08,769 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:27:08,770 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:27:08,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:27:08,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1813451891, now seen corresponding path program 1 times [2020-11-06 22:27:08,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:27:08,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608281151] [2020-11-06 22:27:08,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:27:08,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:09,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:27:09,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:09,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:27:09,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608281151] [2020-11-06 22:27:09,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:27:09,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-06 22:27:09,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186877731] [2020-11-06 22:27:09,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-06 22:27:09,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:27:09,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-06 22:27:09,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:27:09,056 INFO L87 Difference]: Start difference. First operand 120 states. Second operand 3 states. [2020-11-06 22:27:09,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:27:09,335 INFO L93 Difference]: Finished difference Result 247 states and 418 transitions. [2020-11-06 22:27:09,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-06 22:27:09,337 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-11-06 22:27:09,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:27:09,350 INFO L225 Difference]: With dead ends: 247 [2020-11-06 22:27:09,350 INFO L226 Difference]: Without dead ends: 120 [2020-11-06 22:27:09,356 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 [2020-11-06 22:27:09,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-11-06 22:27:09,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 105. [2020-11-06 22:27:09,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-11-06 22:27:09,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 128 transitions. [2020-11-06 22:27:09,416 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 128 transitions. Word has length 15 [2020-11-06 22:27:09,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:27:09,416 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 128 transitions. [2020-11-06 22:27:09,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-06 22:27:09,416 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 128 transitions. [2020-11-06 22:27:09,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-06 22:27:09,417 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:27:09,417 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:27:09,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:27:09,418 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:27:09,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:27:09,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1295215036, now seen corresponding path program 1 times [2020-11-06 22:27:09,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:27:09,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22098392] [2020-11-06 22:27:09,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:27:09,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:09,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:27:09,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:09,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:27:09,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22098392] [2020-11-06 22:27:09,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:27:09,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:27:09,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691706659] [2020-11-06 22:27:09,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:27:09,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:27:09,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:27:09,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:27:09,515 INFO L87 Difference]: Start difference. First operand 105 states and 128 transitions. Second operand 4 states. [2020-11-06 22:27:09,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:27:09,878 INFO L93 Difference]: Finished difference Result 210 states and 259 transitions. [2020-11-06 22:27:09,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 22:27:09,879 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-11-06 22:27:09,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:27:09,881 INFO L225 Difference]: With dead ends: 210 [2020-11-06 22:27:09,881 INFO L226 Difference]: Without dead ends: 117 [2020-11-06 22:27:09,883 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 [2020-11-06 22:27:09,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-11-06 22:27:09,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 107. [2020-11-06 22:27:09,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-11-06 22:27:09,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 130 transitions. [2020-11-06 22:27:09,901 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 130 transitions. Word has length 16 [2020-11-06 22:27:09,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:27:09,901 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 130 transitions. [2020-11-06 22:27:09,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:27:09,901 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 130 transitions. [2020-11-06 22:27:09,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-06 22:27:09,902 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:27:09,902 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] [2020-11-06 22:27:09,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:27:09,903 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:27:09,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:27:09,903 INFO L82 PathProgramCache]: Analyzing trace with hash 909898949, now seen corresponding path program 1 times [2020-11-06 22:27:09,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:27:09,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796149448] [2020-11-06 22:27:09,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:27:09,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:10,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:27:10,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:10,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:27:10,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796149448] [2020-11-06 22:27:10,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:27:10,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-06 22:27:10,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392554466] [2020-11-06 22:27:10,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-06 22:27:10,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:27:10,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-06 22:27:10,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:27:10,045 INFO L87 Difference]: Start difference. First operand 107 states and 130 transitions. Second operand 7 states. [2020-11-06 22:27:10,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:27:10,642 INFO L93 Difference]: Finished difference Result 161 states and 198 transitions. [2020-11-06 22:27:10,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-06 22:27:10,643 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-11-06 22:27:10,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:27:10,645 INFO L225 Difference]: With dead ends: 161 [2020-11-06 22:27:10,645 INFO L226 Difference]: Without dead ends: 154 [2020-11-06 22:27:10,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-11-06 22:27:10,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-11-06 22:27:10,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 110. [2020-11-06 22:27:10,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-11-06 22:27:10,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 133 transitions. [2020-11-06 22:27:10,676 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 133 transitions. Word has length 22 [2020-11-06 22:27:10,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:27:10,676 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 133 transitions. [2020-11-06 22:27:10,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-06 22:27:10,676 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 133 transitions. [2020-11-06 22:27:10,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-06 22:27:10,677 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:27:10,678 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] [2020-11-06 22:27:10,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-06 22:27:10,678 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:27:10,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:27:10,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1845444642, now seen corresponding path program 1 times [2020-11-06 22:27:10,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:27:10,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294074050] [2020-11-06 22:27:10,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:27:10,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:10,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:27:10,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:10,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:27:10,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294074050] [2020-11-06 22:27:10,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:27:10,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:27:10,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638258485] [2020-11-06 22:27:10,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:27:10,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:27:10,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:27:10,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:27:10,799 INFO L87 Difference]: Start difference. First operand 110 states and 133 transitions. Second operand 6 states. [2020-11-06 22:27:11,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:27:11,439 INFO L93 Difference]: Finished difference Result 120 states and 145 transitions. [2020-11-06 22:27:11,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:27:11,439 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-11-06 22:27:11,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:27:11,441 INFO L225 Difference]: With dead ends: 120 [2020-11-06 22:27:11,441 INFO L226 Difference]: Without dead ends: 115 [2020-11-06 22:27:11,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:27:11,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-11-06 22:27:11,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 109. [2020-11-06 22:27:11,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-11-06 22:27:11,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 131 transitions. [2020-11-06 22:27:11,463 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 131 transitions. Word has length 29 [2020-11-06 22:27:11,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:27:11,463 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 131 transitions. [2020-11-06 22:27:11,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:27:11,463 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 131 transitions. [2020-11-06 22:27:11,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-06 22:27:11,464 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:27:11,465 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] [2020-11-06 22:27:11,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-06 22:27:11,465 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:27:11,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:27:11,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1641676436, now seen corresponding path program 1 times [2020-11-06 22:27:11,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:27:11,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449901782] [2020-11-06 22:27:11,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:27:11,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:11,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:27:11,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:11,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:27:11,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449901782] [2020-11-06 22:27:11,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:27:11,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:27:11,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872969634] [2020-11-06 22:27:11,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:27:11,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:27:11,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:27:11,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:27:11,624 INFO L87 Difference]: Start difference. First operand 109 states and 131 transitions. Second operand 6 states. [2020-11-06 22:27:12,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:27:12,251 INFO L93 Difference]: Finished difference Result 119 states and 143 transitions. [2020-11-06 22:27:12,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:27:12,252 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-11-06 22:27:12,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:27:12,253 INFO L225 Difference]: With dead ends: 119 [2020-11-06 22:27:12,254 INFO L226 Difference]: Without dead ends: 114 [2020-11-06 22:27:12,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:27:12,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-11-06 22:27:12,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 108. [2020-11-06 22:27:12,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-11-06 22:27:12,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 129 transitions. [2020-11-06 22:27:12,268 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 129 transitions. Word has length 29 [2020-11-06 22:27:12,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:27:12,268 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 129 transitions. [2020-11-06 22:27:12,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:27:12,268 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 129 transitions. [2020-11-06 22:27:12,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-06 22:27:12,269 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:27:12,270 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] [2020-11-06 22:27:12,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-06 22:27:12,270 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:27:12,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:27:12,270 INFO L82 PathProgramCache]: Analyzing trace with hash -178219071, now seen corresponding path program 1 times [2020-11-06 22:27:12,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:27:12,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763554439] [2020-11-06 22:27:12,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:27:12,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:12,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:27:12,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:12,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:27:12,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763554439] [2020-11-06 22:27:12,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:27:12,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-06 22:27:12,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853303729] [2020-11-06 22:27:12,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-06 22:27:12,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:27:12,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-06 22:27:12,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:27:12,407 INFO L87 Difference]: Start difference. First operand 108 states and 129 transitions. Second operand 9 states. [2020-11-06 22:27:13,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:27:13,326 INFO L93 Difference]: Finished difference Result 151 states and 181 transitions. [2020-11-06 22:27:13,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-06 22:27:13,333 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-11-06 22:27:13,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:27:13,335 INFO L225 Difference]: With dead ends: 151 [2020-11-06 22:27:13,335 INFO L226 Difference]: Without dead ends: 146 [2020-11-06 22:27:13,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-11-06 22:27:13,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-11-06 22:27:13,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 114. [2020-11-06 22:27:13,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-11-06 22:27:13,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 135 transitions. [2020-11-06 22:27:13,356 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 135 transitions. Word has length 32 [2020-11-06 22:27:13,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:27:13,356 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 135 transitions. [2020-11-06 22:27:13,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-06 22:27:13,357 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 135 transitions. [2020-11-06 22:27:13,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-06 22:27:13,358 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:27:13,358 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] [2020-11-06 22:27:13,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-06 22:27:13,358 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:27:13,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:27:13,359 INFO L82 PathProgramCache]: Analyzing trace with hash -509933216, now seen corresponding path program 1 times [2020-11-06 22:27:13,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:27:13,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606724198] [2020-11-06 22:27:13,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:27:13,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:13,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:27:13,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:13,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:27:13,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606724198] [2020-11-06 22:27:13,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:27:13,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-06 22:27:13,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081945884] [2020-11-06 22:27:13,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-06 22:27:13,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:27:13,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-06 22:27:13,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:27:13,473 INFO L87 Difference]: Start difference. First operand 114 states and 135 transitions. Second operand 9 states. [2020-11-06 22:27:14,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:27:14,449 INFO L93 Difference]: Finished difference Result 150 states and 179 transitions. [2020-11-06 22:27:14,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-06 22:27:14,449 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-11-06 22:27:14,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:27:14,451 INFO L225 Difference]: With dead ends: 150 [2020-11-06 22:27:14,451 INFO L226 Difference]: Without dead ends: 145 [2020-11-06 22:27:14,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-11-06 22:27:14,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-11-06 22:27:14,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 120. [2020-11-06 22:27:14,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-11-06 22:27:14,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 141 transitions. [2020-11-06 22:27:14,472 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 141 transitions. Word has length 32 [2020-11-06 22:27:14,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:27:14,472 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 141 transitions. [2020-11-06 22:27:14,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-06 22:27:14,473 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 141 transitions. [2020-11-06 22:27:14,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-06 22:27:14,474 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:27:14,474 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] [2020-11-06 22:27:14,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-06 22:27:14,474 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:27:14,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:27:14,475 INFO L82 PathProgramCache]: Analyzing trace with hash -2052818065, now seen corresponding path program 1 times [2020-11-06 22:27:14,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:27:14,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537873013] [2020-11-06 22:27:14,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:27:14,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:27:14,500 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:27:14,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:27:14,518 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:27:14,560 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-06 22:27:14,560 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-06 22:27:14,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-06 22:27:14,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:27:14 BoogieIcfgContainer [2020-11-06 22:27:14,599 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:27:14,601 INFO L168 Benchmark]: Toolchain (without parser) took 7881.04 ms. Allocated memory was 151.0 MB in the beginning and 222.3 MB in the end (delta: 71.3 MB). Free memory was 125.1 MB in the beginning and 105.9 MB in the end (delta: 19.2 MB). Peak memory consumption was 91.3 MB. Max. memory is 8.0 GB. [2020-11-06 22:27:14,602 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:27:14,603 INFO L168 Benchmark]: CACSL2BoogieTranslator took 694.97 ms. Allocated memory is still 151.0 MB. Free memory was 124.5 MB in the beginning and 132.6 MB in the end (delta: -8.2 MB). Peak memory consumption was 28.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:27:14,604 INFO L168 Benchmark]: Boogie Preprocessor took 133.75 ms. Allocated memory is still 151.0 MB. Free memory was 132.6 MB in the beginning and 128.8 MB in the end (delta: 3.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2020-11-06 22:27:14,605 INFO L168 Benchmark]: RCFGBuilder took 1109.91 ms. Allocated memory is still 151.0 MB. Free memory was 128.8 MB in the beginning and 64.3 MB in the end (delta: 64.5 MB). Peak memory consumption was 64.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:27:14,606 INFO L168 Benchmark]: TraceAbstraction took 5928.62 ms. Allocated memory was 151.0 MB in the beginning and 222.3 MB in the end (delta: 71.3 MB). Free memory was 63.8 MB in the beginning and 105.9 MB in the end (delta: -42.1 MB). Peak memory consumption was 29.7 MB. Max. memory is 8.0 GB. [2020-11-06 22:27:14,609 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 694.97 ms. Allocated memory is still 151.0 MB. Free memory was 124.5 MB in the beginning and 132.6 MB in the end (delta: -8.2 MB). Peak memory consumption was 28.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 133.75 ms. Allocated memory is still 151.0 MB. Free memory was 132.6 MB in the beginning and 128.8 MB in the end (delta: 3.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1109.91 ms. Allocated memory is still 151.0 MB. Free memory was 128.8 MB in the beginning and 64.3 MB in the end (delta: 64.5 MB). Peak memory consumption was 64.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5928.62 ms. Allocated memory was 151.0 MB in the beginning and 222.3 MB in the end (delta: 71.3 MB). Free memory was 63.8 MB in the beginning and 105.9 MB in the end (delta: -42.1 MB). Peak memory consumption was 29.7 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() [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 [L644] node->value = __VERIFIER_nondet_int() [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 [L649] item->next = data [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()) [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) [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))) [L624] EXPR shape->slist VAL [shape={-3:0}, shape={-3:0}, shape->slist={-1:0}] [L624] COND FALSE !(!(shape->slist)) [L625] EXPR shape->slist [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)) [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, 126 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.8s, OverallIterations: 8, TraceHistogramMax: 2, AutomataDifference: 4.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 807 SDtfs, 956 SDslu, 989 SDs, 0 SdLazy, 2112 SolverSat, 227 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=120occurred 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: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 138 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 210 NumberOfCodeBlocks, 210 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 168 ConstructedInterpolants, 0 QuantifiedInterpolants, 21128 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...