/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDEST -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 0.1.25-5644d1e-m [2020-08-18 22:43:51,444 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 22:43:51,447 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 22:43:51,488 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 22:43:51,489 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 22:43:51,498 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 22:43:51,500 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 22:43:51,504 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 22:43:51,507 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 22:43:51,510 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 22:43:51,511 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 22:43:51,512 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 22:43:51,512 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 22:43:51,515 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 22:43:51,517 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 22:43:51,519 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 22:43:51,520 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 22:43:51,521 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 22:43:51,523 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 22:43:51,532 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 22:43:51,535 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 22:43:51,536 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 22:43:51,537 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 22:43:51,537 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 22:43:51,549 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 22:43:51,549 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 22:43:51,550 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 22:43:51,558 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 22:43:51,558 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 22:43:51,559 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 22:43:51,559 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 22:43:51,560 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 22:43:51,564 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 22:43:51,565 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 22:43:51,566 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 22:43:51,566 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 22:43:51,566 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 22:43:51,567 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 22:43:51,567 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 22:43:51,568 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 22:43:51,568 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 22:43:51,569 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 22:43:51,610 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 22:43:51,610 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 22:43:51,611 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 22:43:51,612 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 22:43:51,612 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 22:43:51,612 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 22:43:51,612 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 22:43:51,613 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 22:43:51,613 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 22:43:51,613 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 22:43:51,613 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 22:43:51,613 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 22:43:51,613 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 22:43:51,614 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 22:43:51,614 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 22:43:51,614 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 22:43:51,614 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 22:43:51,614 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 22:43:51,615 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 22:43:51,615 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 22:43:51,615 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 22:43:51,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 22:43:51,616 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 22:43:51,616 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 22:43:51,616 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 22:43:51,616 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 22:43:51,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 22:43:51,616 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 22:43:51,617 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 22:43:51,617 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES 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: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDEST; [2020-08-18 22:43:51,898 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 22:43:51,921 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 22:43:51,926 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 22:43:51,928 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 22:43:51,928 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 22:43:51,929 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/merge_sort-1.i [2020-08-18 22:43:51,992 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c9b2de5fc/06593d3379334cfc8db41820a53de601/FLAG2aed6282d [2020-08-18 22:43:52,532 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 22:43:52,533 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-manipulation/merge_sort-1.i [2020-08-18 22:43:52,546 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c9b2de5fc/06593d3379334cfc8db41820a53de601/FLAG2aed6282d [2020-08-18 22:43:52,841 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c9b2de5fc/06593d3379334cfc8db41820a53de601 [2020-08-18 22:43:52,849 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 22:43:52,851 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 22:43:52,852 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 22:43:52,852 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 22:43:52,855 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 22:43:52,856 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:43:52" (1/1) ... [2020-08-18 22:43:52,859 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40abc6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:52, skipping insertion in model container [2020-08-18 22:43:52,859 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:43:52" (1/1) ... [2020-08-18 22:43:52,867 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 22:43:52,922 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 22:43:53,322 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:43:53,332 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 22:43:53,404 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:43:53,467 INFO L208 MainTranslator]: Completed translation [2020-08-18 22:43:53,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:53 WrapperNode [2020-08-18 22:43:53,469 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 22:43:53,470 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 22:43:53,470 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 22:43:53,470 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 22:43:53,481 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:53" (1/1) ... [2020-08-18 22:43:53,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:53" (1/1) ... [2020-08-18 22:43:53,499 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:53" (1/1) ... [2020-08-18 22:43:53,499 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:53" (1/1) ... [2020-08-18 22:43:53,525 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:53" (1/1) ... [2020-08-18 22:43:53,537 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:53" (1/1) ... [2020-08-18 22:43:53,541 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:53" (1/1) ... [2020-08-18 22:43:53,549 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 22:43:53,550 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 22:43:53,550 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 22:43:53,550 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 22:43:53,551 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:53" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 22:43:53,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 22:43:53,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 22:43:53,607 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-18 22:43:53,607 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-18 22:43:53,608 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-08-18 22:43:53,608 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2020-08-18 22:43:53,608 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_pair [2020-08-18 22:43:53,608 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_sort_core [2020-08-18 22:43:53,608 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_before [2020-08-18 22:43:53,608 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_after [2020-08-18 22:43:53,609 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 22:43:53,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 22:43:53,609 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-18 22:43:53,609 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-18 22:43:53,609 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-18 22:43:53,609 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-18 22:43:53,610 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-18 22:43:53,610 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-18 22:43:53,610 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-18 22:43:53,610 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-18 22:43:53,610 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-18 22:43:53,610 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-18 22:43:53,610 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-18 22:43:53,611 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-18 22:43:53,611 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-18 22:43:53,611 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-18 22:43:53,611 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-18 22:43:53,611 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-18 22:43:53,611 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-18 22:43:53,612 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-18 22:43:53,612 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-18 22:43:53,612 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-18 22:43:53,612 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-18 22:43:53,612 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-18 22:43:53,612 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-18 22:43:53,613 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-18 22:43:53,613 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-18 22:43:53,613 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-18 22:43:53,613 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-18 22:43:53,613 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-18 22:43:53,613 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-18 22:43:53,613 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-18 22:43:53,614 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-18 22:43:53,614 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-18 22:43:53,614 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-18 22:43:53,614 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-18 22:43:53,614 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-18 22:43:53,614 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-18 22:43:53,614 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-18 22:43:53,614 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-18 22:43:53,614 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-18 22:43:53,614 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-18 22:43:53,615 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-18 22:43:53,615 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-18 22:43:53,615 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-18 22:43:53,615 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-18 22:43:53,615 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-18 22:43:53,615 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-18 22:43:53,615 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-18 22:43:53,616 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-18 22:43:53,616 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-18 22:43:53,616 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-18 22:43:53,616 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-18 22:43:53,616 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-18 22:43:53,616 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 22:43:53,616 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-18 22:43:53,616 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-18 22:43:53,617 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 22:43:53,617 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-18 22:43:53,617 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-18 22:43:53,617 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-18 22:43:53,617 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-18 22:43:53,617 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 22:43:53,617 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-18 22:43:53,618 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-18 22:43:53,618 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-18 22:43:53,618 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-18 22:43:53,618 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-18 22:43:53,618 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-18 22:43:53,618 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-18 22:43:53,619 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-18 22:43:53,619 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-18 22:43:53,619 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-18 22:43:53,619 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-18 22:43:53,619 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-18 22:43:53,619 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-18 22:43:53,619 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-18 22:43:53,620 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-18 22:43:53,620 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-18 22:43:53,620 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-18 22:43:53,620 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-18 22:43:53,620 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-18 22:43:53,620 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-18 22:43:53,620 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-18 22:43:53,620 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-18 22:43:53,621 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-18 22:43:53,621 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-18 22:43:53,621 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-18 22:43:53,621 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-18 22:43:53,621 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-18 22:43:53,621 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-18 22:43:53,621 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-18 22:43:53,621 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-18 22:43:53,621 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-18 22:43:53,621 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-18 22:43:53,622 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-18 22:43:53,622 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-18 22:43:53,622 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-18 22:43:53,622 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-18 22:43:53,622 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-18 22:43:53,622 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-18 22:43:53,622 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-18 22:43:53,622 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-18 22:43:53,622 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-18 22:43:53,622 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 22:43:53,623 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-08-18 22:43:53,623 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2020-08-18 22:43:53,623 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 22:43:53,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 22:43:53,627 INFO L130 BoogieDeclarations]: Found specification of procedure merge_pair [2020-08-18 22:43:53,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 22:43:53,627 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 22:43:53,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 22:43:53,628 INFO L130 BoogieDeclarations]: Found specification of procedure seq_sort_core [2020-08-18 22:43:53,628 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_before [2020-08-18 22:43:53,628 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_after [2020-08-18 22:43:53,628 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 22:43:53,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 22:43:53,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 22:43:53,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 22:43:53,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 22:43:54,390 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 22:43:54,390 INFO L295 CfgBuilder]: Removed 33 assume(true) statements. [2020-08-18 22:43:54,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:43:54 BoogieIcfgContainer [2020-08-18 22:43:54,402 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 22:43:54,404 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 22:43:54,404 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 22:43:54,411 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 22:43:54,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:43:52" (1/3) ... [2020-08-18 22:43:54,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15009ba5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:43:54, skipping insertion in model container [2020-08-18 22:43:54,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:53" (2/3) ... [2020-08-18 22:43:54,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15009ba5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:43:54, skipping insertion in model container [2020-08-18 22:43:54,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:43:54" (3/3) ... [2020-08-18 22:43:54,417 INFO L109 eAbstractionObserver]: Analyzing ICFG merge_sort-1.i [2020-08-18 22:43:54,431 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 22:43:54,440 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 22:43:54,456 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 22:43:54,515 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 22:43:54,515 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 22:43:54,515 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 22:43:54,516 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 22:43:54,516 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 22:43:54,516 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 22:43:54,516 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 22:43:54,517 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 22:43:54,551 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states. [2020-08-18 22:43:54,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 22:43:54,559 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:54,560 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:54,561 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:54,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:54,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1873878464, now seen corresponding path program 1 times [2020-08-18 22:43:54,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:54,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584648605] [2020-08-18 22:43:54,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:54,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:54,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:54,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:54,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:54,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584648605] [2020-08-18 22:43:54,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:54,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:54,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550890820] [2020-08-18 22:43:54,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:54,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:54,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:54,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:54,781 INFO L87 Difference]: Start difference. First operand 115 states. Second operand 3 states. [2020-08-18 22:43:55,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:55,045 INFO L93 Difference]: Finished difference Result 240 states and 408 transitions. [2020-08-18 22:43:55,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:55,047 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-08-18 22:43:55,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:55,061 INFO L225 Difference]: With dead ends: 240 [2020-08-18 22:43:55,062 INFO L226 Difference]: Without dead ends: 118 [2020-08-18 22:43:55,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:55,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-08-18 22:43:55,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 103. [2020-08-18 22:43:55,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-18 22:43:55,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 126 transitions. [2020-08-18 22:43:55,132 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 126 transitions. Word has length 13 [2020-08-18 22:43:55,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:55,132 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 126 transitions. [2020-08-18 22:43:55,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:55,133 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 126 transitions. [2020-08-18 22:43:55,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 22:43:55,133 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:55,134 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:55,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 22:43:55,134 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:55,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:55,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1323314826, now seen corresponding path program 1 times [2020-08-18 22:43:55,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:55,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951456597] [2020-08-18 22:43:55,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:55,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:55,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:55,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:55,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:55,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [951456597] [2020-08-18 22:43:55,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:55,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 22:43:55,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472425588] [2020-08-18 22:43:55,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 22:43:55,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:55,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 22:43:55,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 22:43:55,208 INFO L87 Difference]: Start difference. First operand 103 states and 126 transitions. Second operand 4 states. [2020-08-18 22:43:55,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:55,529 INFO L93 Difference]: Finished difference Result 206 states and 255 transitions. [2020-08-18 22:43:55,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:43:55,532 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-18 22:43:55,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:55,534 INFO L225 Difference]: With dead ends: 206 [2020-08-18 22:43:55,535 INFO L226 Difference]: Without dead ends: 115 [2020-08-18 22:43:55,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:43:55,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-08-18 22:43:55,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2020-08-18 22:43:55,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-18 22:43:55,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 128 transitions. [2020-08-18 22:43:55,558 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 128 transitions. Word has length 14 [2020-08-18 22:43:55,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:55,559 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 128 transitions. [2020-08-18 22:43:55,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 22:43:55,559 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 128 transitions. [2020-08-18 22:43:55,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 22:43:55,560 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:55,560 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:55,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 22:43:55,561 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:55,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:55,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1684995551, now seen corresponding path program 1 times [2020-08-18 22:43:55,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:55,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089219605] [2020-08-18 22:43:55,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:55,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:55,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:55,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:55,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:55,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089219605] [2020-08-18 22:43:55,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:55,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 22:43:55,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134827284] [2020-08-18 22:43:55,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 22:43:55,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:55,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 22:43:55,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 22:43:55,718 INFO L87 Difference]: Start difference. First operand 105 states and 128 transitions. Second operand 7 states. [2020-08-18 22:43:56,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:56,318 INFO L93 Difference]: Finished difference Result 157 states and 194 transitions. [2020-08-18 22:43:56,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 22:43:56,319 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-08-18 22:43:56,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:56,321 INFO L225 Difference]: With dead ends: 157 [2020-08-18 22:43:56,322 INFO L226 Difference]: Without dead ends: 152 [2020-08-18 22:43:56,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-08-18 22:43:56,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-18 22:43:56,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 108. [2020-08-18 22:43:56,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-18 22:43:56,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 131 transitions. [2020-08-18 22:43:56,338 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 131 transitions. Word has length 20 [2020-08-18 22:43:56,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:56,339 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 131 transitions. [2020-08-18 22:43:56,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 22:43:56,339 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 131 transitions. [2020-08-18 22:43:56,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 22:43:56,340 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:56,340 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] [2020-08-18 22:43:56,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 22:43:56,341 INFO L427 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:56,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:56,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1145945773, now seen corresponding path program 1 times [2020-08-18 22:43:56,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:56,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862054009] [2020-08-18 22:43:56,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:56,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:56,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:56,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:56,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 22:43:56,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862054009] [2020-08-18 22:43:56,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:56,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 22:43:56,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584742116] [2020-08-18 22:43:56,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 22:43:56,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:56,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 22:43:56,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:43:56,441 INFO L87 Difference]: Start difference. First operand 108 states and 131 transitions. Second operand 6 states. [2020-08-18 22:43:56,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:56,835 INFO L93 Difference]: Finished difference Result 116 states and 141 transitions. [2020-08-18 22:43:56,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 22:43:56,836 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-08-18 22:43:56,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:56,838 INFO L225 Difference]: With dead ends: 116 [2020-08-18 22:43:56,838 INFO L226 Difference]: Without dead ends: 113 [2020-08-18 22:43:56,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-08-18 22:43:56,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-08-18 22:43:56,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 107. [2020-08-18 22:43:56,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-18 22:43:56,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 129 transitions. [2020-08-18 22:43:56,851 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 129 transitions. Word has length 27 [2020-08-18 22:43:56,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:56,851 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 129 transitions. [2020-08-18 22:43:56,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 22:43:56,852 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 129 transitions. [2020-08-18 22:43:56,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 22:43:56,853 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:56,853 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] [2020-08-18 22:43:56,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 22:43:56,853 INFO L427 AbstractCegarLoop]: === Iteration 5 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:56,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:56,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1471361763, now seen corresponding path program 1 times [2020-08-18 22:43:56,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:56,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476109902] [2020-08-18 22:43:56,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:56,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:56,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:56,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:56,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 22:43:56,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476109902] [2020-08-18 22:43:56,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:56,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 22:43:56,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556929420] [2020-08-18 22:43:56,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 22:43:56,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:56,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 22:43:56,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:43:56,940 INFO L87 Difference]: Start difference. First operand 107 states and 129 transitions. Second operand 6 states. [2020-08-18 22:43:57,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:57,397 INFO L93 Difference]: Finished difference Result 115 states and 139 transitions. [2020-08-18 22:43:57,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 22:43:57,398 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-08-18 22:43:57,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:57,399 INFO L225 Difference]: With dead ends: 115 [2020-08-18 22:43:57,400 INFO L226 Difference]: Without dead ends: 112 [2020-08-18 22:43:57,400 INFO L675 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 [2020-08-18 22:43:57,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-08-18 22:43:57,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2020-08-18 22:43:57,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-08-18 22:43:57,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 127 transitions. [2020-08-18 22:43:57,410 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 127 transitions. Word has length 27 [2020-08-18 22:43:57,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:57,411 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 127 transitions. [2020-08-18 22:43:57,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 22:43:57,411 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 127 transitions. [2020-08-18 22:43:57,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 22:43:57,412 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:57,412 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] [2020-08-18 22:43:57,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 22:43:57,413 INFO L427 AbstractCegarLoop]: === Iteration 6 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:57,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:57,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1648323131, now seen corresponding path program 1 times [2020-08-18 22:43:57,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:57,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258009009] [2020-08-18 22:43:57,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:57,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:57,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:57,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:57,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:57,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258009009] [2020-08-18 22:43:57,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:57,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 22:43:57,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938888780] [2020-08-18 22:43:57,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 22:43:57,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:57,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 22:43:57,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-18 22:43:57,552 INFO L87 Difference]: Start difference. First operand 106 states and 127 transitions. Second operand 9 states. [2020-08-18 22:43:58,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:58,272 INFO L93 Difference]: Finished difference Result 147 states and 177 transitions. [2020-08-18 22:43:58,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 22:43:58,273 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-08-18 22:43:58,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:58,276 INFO L225 Difference]: With dead ends: 147 [2020-08-18 22:43:58,276 INFO L226 Difference]: Without dead ends: 144 [2020-08-18 22:43:58,276 INFO L675 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 [2020-08-18 22:43:58,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-08-18 22:43:58,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 112. [2020-08-18 22:43:58,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-08-18 22:43:58,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2020-08-18 22:43:58,302 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 30 [2020-08-18 22:43:58,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:58,303 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2020-08-18 22:43:58,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 22:43:58,304 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2020-08-18 22:43:58,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 22:43:58,305 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:58,305 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] [2020-08-18 22:43:58,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 22:43:58,306 INFO L427 AbstractCegarLoop]: === Iteration 7 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:58,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:58,306 INFO L82 PathProgramCache]: Analyzing trace with hash 861386650, now seen corresponding path program 1 times [2020-08-18 22:43:58,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:58,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15971430] [2020-08-18 22:43:58,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:58,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:58,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:58,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:58,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15971430] [2020-08-18 22:43:58,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:58,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 22:43:58,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647900490] [2020-08-18 22:43:58,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 22:43:58,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:58,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 22:43:58,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-18 22:43:58,442 INFO L87 Difference]: Start difference. First operand 112 states and 133 transitions. Second operand 9 states. [2020-08-18 22:43:59,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:59,078 INFO L93 Difference]: Finished difference Result 146 states and 175 transitions. [2020-08-18 22:43:59,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 22:43:59,079 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-08-18 22:43:59,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:59,083 INFO L225 Difference]: With dead ends: 146 [2020-08-18 22:43:59,083 INFO L226 Difference]: Without dead ends: 143 [2020-08-18 22:43:59,084 INFO L675 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 [2020-08-18 22:43:59,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-08-18 22:43:59,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 118. [2020-08-18 22:43:59,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-08-18 22:43:59,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 139 transitions. [2020-08-18 22:43:59,102 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 139 transitions. Word has length 30 [2020-08-18 22:43:59,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:59,103 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 139 transitions. [2020-08-18 22:43:59,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 22:43:59,103 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 139 transitions. [2020-08-18 22:43:59,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-18 22:43:59,109 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:59,109 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:59,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 22:43:59,110 INFO L427 AbstractCegarLoop]: === Iteration 8 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:59,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:59,110 INFO L82 PathProgramCache]: Analyzing trace with hash 671486784, now seen corresponding path program 1 times [2020-08-18 22:43:59,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:59,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415074193] [2020-08-18 22:43:59,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:59,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 22:43:59,155 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 22:43:59,159 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 22:43:59,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 22:43:59,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 10:43:59 BoogieIcfgContainer [2020-08-18 22:43:59,195 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 22:43:59,198 INFO L168 Benchmark]: Toolchain (without parser) took 6346.20 ms. Allocated memory was 140.0 MB in the beginning and 292.0 MB in the end (delta: 152.0 MB). Free memory was 101.4 MB in the beginning and 128.2 MB in the end (delta: -26.9 MB). Peak memory consumption was 125.2 MB. Max. memory is 7.1 GB. [2020-08-18 22:43:59,205 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 22:43:59,207 INFO L168 Benchmark]: CACSL2BoogieTranslator took 617.62 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 101.2 MB in the beginning and 167.8 MB in the end (delta: -66.6 MB). Peak memory consumption was 24.5 MB. Max. memory is 7.1 GB. [2020-08-18 22:43:59,207 INFO L168 Benchmark]: Boogie Preprocessor took 79.71 ms. Allocated memory is still 203.4 MB. Free memory was 167.1 MB in the beginning and 163.9 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. [2020-08-18 22:43:59,208 INFO L168 Benchmark]: RCFGBuilder took 852.57 ms. Allocated memory is still 203.4 MB. Free memory was 163.2 MB in the beginning and 94.7 MB in the end (delta: 68.5 MB). Peak memory consumption was 68.5 MB. Max. memory is 7.1 GB. [2020-08-18 22:43:59,209 INFO L168 Benchmark]: TraceAbstraction took 4791.30 ms. Allocated memory was 203.4 MB in the beginning and 292.0 MB in the end (delta: 88.6 MB). Free memory was 94.1 MB in the beginning and 128.2 MB in the end (delta: -34.1 MB). Peak memory consumption was 54.5 MB. Max. memory is 7.1 GB. [2020-08-18 22:43:59,222 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 617.62 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 101.2 MB in the beginning and 167.8 MB in the end (delta: -66.6 MB). Peak memory consumption was 24.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 79.71 ms. Allocated memory is still 203.4 MB. Free memory was 167.1 MB in the beginning and 163.9 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 852.57 ms. Allocated memory is still 203.4 MB. Free memory was 163.2 MB in the beginning and 94.7 MB in the end (delta: 68.5 MB). Peak memory consumption was 68.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4791.30 ms. Allocated memory was 203.4 MB in the beginning and 292.0 MB in the end (delta: 88.6 MB). Free memory was 94.1 MB in the beginning and 128.2 MB in the end (delta: -34.1 MB). Peak memory consumption was 54.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 554]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L627] struct list *data = ((void *)0); [L628] COND TRUE __VERIFIER_nondet_int() [L629] struct node *node = malloc(sizeof *node); [L630] COND FALSE !(!node) [L632] node->next = node [L633] node->value = __VERIFIER_nondet_int() [L634] struct list *item = malloc(sizeof *item); [L635] COND FALSE !(!item) [L637] item->slist = node [L638] item->next = data [L639] data = item [L628] COND FALSE !(__VERIFIER_nondet_int()) [L641] COND FALSE !(!data) [L643] CALL inspect_before(data) [L604] COND FALSE !(!(shape)) [L605] shape->next [L605] COND FALSE !(shape->next) [L611] COND FALSE !(!(shape)) [L612] EXPR shape->next [L612] COND FALSE !(!(shape->next == ((void *)0))) [L613] EXPR shape->slist [L613] COND FALSE !(!(shape->slist)) [L614] EXPR shape->slist [L614] EXPR shape->slist->next [L614] COND TRUE !(shape->slist->next == ((void *)0)) [L614] CALL fail() [L554] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 121 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.6s, OverallIterations: 8, TraceHistogramMax: 2, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 793 SDtfs, 949 SDslu, 966 SDs, 0 SdLazy, 2089 SolverSat, 220 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=118occurred in iteration=7, 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, 0.5s InterpolantComputationTime, 194 NumberOfCodeBlocks, 194 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 154 ConstructedInterpolants, 0 QuantifiedInterpolants, 16950 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...