/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -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-c90d42b [2020-09-24 21:36:29,464 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:36:29,468 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:36:29,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:36:29,495 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:36:29,497 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:36:29,498 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:36:29,500 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:36:29,502 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:36:29,506 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:36:29,507 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:36:29,508 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:36:29,509 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:36:29,510 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:36:29,514 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:36:29,516 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:36:29,519 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:36:29,523 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:36:29,526 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:36:29,529 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:36:29,532 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:36:29,534 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:36:29,536 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:36:29,537 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:36:29,544 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:36:29,544 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:36:29,544 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:36:29,548 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:36:29,549 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:36:29,551 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:36:29,551 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:36:29,552 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:36:29,553 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:36:29,554 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:36:29,565 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:36:29,565 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:36:29,569 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:36:29,569 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:36:29,569 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:36:29,571 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:36:29,571 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:36:29,572 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 [2020-09-24 21:36:29,624 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:36:29,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:36:29,626 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:36:29,627 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:36:29,627 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:36:29,627 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:36:29,628 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:36:29,628 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:36:29,628 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:36:29,628 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:36:29,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:36:29,630 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:36:29,630 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:36:29,630 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:36:29,633 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:36:29,633 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:36:29,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:36:29,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:36:29,633 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:36:29,634 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:36:29,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:36:29,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:36:29,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:36:29,634 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:36:29,634 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:36:29,634 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:36:29,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:36:29,635 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:36:29,635 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:36:29,635 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.rcfgbuilder: Size of a code block -> SingleStatement 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 -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:36:30,140 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:36:30,157 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:36:30,162 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:36:30,164 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:36:30,165 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:36:30,166 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/merge_sort-1.i [2020-09-24 21:36:30,256 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ba1abf41d/c8ebbeea6cd449e0a47c3d36f3dcd082/FLAG5e511c2b3 [2020-09-24 21:36:30,905 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:36:30,905 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-manipulation/merge_sort-1.i [2020-09-24 21:36:30,920 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ba1abf41d/c8ebbeea6cd449e0a47c3d36f3dcd082/FLAG5e511c2b3 [2020-09-24 21:36:31,159 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ba1abf41d/c8ebbeea6cd449e0a47c3d36f3dcd082 [2020-09-24 21:36:31,172 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:36:31,176 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:36:31,177 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:36:31,177 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:36:31,183 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:36:31,184 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:36:31" (1/1) ... [2020-09-24 21:36:31,188 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68352751 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:36:31, skipping insertion in model container [2020-09-24 21:36:31,189 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:36:31" (1/1) ... [2020-09-24 21:36:31,197 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:36:31,252 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:36:31,753 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:36:31,774 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:36:31,887 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:36:31,945 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:36:31,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:36:31 WrapperNode [2020-09-24 21:36:31,950 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:36:31,953 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:36:31,953 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:36:31,953 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:36:31,980 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:36:31" (1/1) ... [2020-09-24 21:36:31,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:36:31" (1/1) ... [2020-09-24 21:36:32,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:36:31" (1/1) ... [2020-09-24 21:36:32,023 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:36:31" (1/1) ... [2020-09-24 21:36:32,048 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:36:31" (1/1) ... [2020-09-24 21:36:32,060 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:36:31" (1/1) ... [2020-09-24 21:36:32,065 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:36:31" (1/1) ... [2020-09-24 21:36:32,074 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:36:32,074 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:36:32,074 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:36:32,075 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:36:32,076 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:36:31" (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 [2020-09-24 21:36:32,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:36:32,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:36:32,152 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-24 21:36:32,152 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-24 21:36:32,152 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-09-24 21:36:32,153 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2020-09-24 21:36:32,153 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_pair [2020-09-24 21:36:32,153 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_sort_core [2020-09-24 21:36:32,153 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_before [2020-09-24 21:36:32,153 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_after [2020-09-24 21:36:32,154 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:36:32,154 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:36:32,154 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-24 21:36:32,154 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-24 21:36:32,154 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-24 21:36:32,155 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-24 21:36:32,155 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-24 21:36:32,155 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-24 21:36:32,155 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-24 21:36:32,156 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-24 21:36:32,157 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-24 21:36:32,157 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-24 21:36:32,158 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-24 21:36:32,158 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-24 21:36:32,160 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-24 21:36:32,160 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-24 21:36:32,160 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-24 21:36:32,161 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-24 21:36:32,161 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-24 21:36:32,161 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-24 21:36:32,161 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-24 21:36:32,161 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-24 21:36:32,161 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-24 21:36:32,161 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-24 21:36:32,162 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-24 21:36:32,162 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-24 21:36:32,162 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-24 21:36:32,162 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-24 21:36:32,162 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-24 21:36:32,162 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-24 21:36:32,162 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-24 21:36:32,163 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-24 21:36:32,163 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-24 21:36:32,163 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-24 21:36:32,163 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-24 21:36:32,163 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-24 21:36:32,163 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-24 21:36:32,163 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-24 21:36:32,163 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-24 21:36:32,164 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-24 21:36:32,164 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-24 21:36:32,164 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-24 21:36:32,164 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-24 21:36:32,164 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-24 21:36:32,164 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-24 21:36:32,164 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-24 21:36:32,165 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-24 21:36:32,165 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-24 21:36:32,165 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-24 21:36:32,165 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-24 21:36:32,165 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-24 21:36:32,165 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-24 21:36:32,165 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-24 21:36:32,166 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-24 21:36:32,166 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 21:36:32,166 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-24 21:36:32,166 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-24 21:36:32,166 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-24 21:36:32,166 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-24 21:36:32,167 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-24 21:36:32,167 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-24 21:36:32,167 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-24 21:36:32,167 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 21:36:32,167 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-24 21:36:32,167 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-24 21:36:32,168 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:36:32,168 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-24 21:36:32,168 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-24 21:36:32,168 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-24 21:36:32,168 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-24 21:36:32,168 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-24 21:36:32,168 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-24 21:36:32,169 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-24 21:36:32,169 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-24 21:36:32,169 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-24 21:36:32,169 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-24 21:36:32,169 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-24 21:36:32,169 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-24 21:36:32,170 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-24 21:36:32,170 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-24 21:36:32,170 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-24 21:36:32,170 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-24 21:36:32,170 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-24 21:36:32,170 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-24 21:36:32,170 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-24 21:36:32,171 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-24 21:36:32,171 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-24 21:36:32,171 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-24 21:36:32,171 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-24 21:36:32,171 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-24 21:36:32,171 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-24 21:36:32,171 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-24 21:36:32,171 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-24 21:36:32,171 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-24 21:36:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-24 21:36:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-24 21:36:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-24 21:36:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-24 21:36:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-24 21:36:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-24 21:36:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-24 21:36:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-24 21:36:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-24 21:36:32,173 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-24 21:36:32,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:36:32,173 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-09-24 21:36:32,173 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2020-09-24 21:36:32,173 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 21:36:32,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 21:36:32,174 INFO L130 BoogieDeclarations]: Found specification of procedure merge_pair [2020-09-24 21:36:32,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 21:36:32,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 21:36:32,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 21:36:32,174 INFO L130 BoogieDeclarations]: Found specification of procedure seq_sort_core [2020-09-24 21:36:32,174 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_before [2020-09-24 21:36:32,174 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_after [2020-09-24 21:36:32,174 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:36:32,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 21:36:32,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 21:36:32,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:36:32,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:36:33,131 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:36:33,131 INFO L295 CfgBuilder]: Removed 33 assume(true) statements. [2020-09-24 21:36:33,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:36:33 BoogieIcfgContainer [2020-09-24 21:36:33,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:36:33,140 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:36:33,140 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:36:33,144 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:36:33,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:36:31" (1/3) ... [2020-09-24 21:36:33,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df94c23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:36:33, skipping insertion in model container [2020-09-24 21:36:33,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:36:31" (2/3) ... [2020-09-24 21:36:33,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df94c23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:36:33, skipping insertion in model container [2020-09-24 21:36:33,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:36:33" (3/3) ... [2020-09-24 21:36:33,148 INFO L109 eAbstractionObserver]: Analyzing ICFG merge_sort-1.i [2020-09-24 21:36:33,160 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:36:33,170 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:36:33,192 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:36:33,225 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:36:33,225 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:36:33,225 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:36:33,225 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:36:33,226 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:36:33,226 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:36:33,226 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:36:33,226 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:36:33,256 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states. [2020-09-24 21:36:33,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-24 21:36:33,265 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:36:33,266 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:36:33,267 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:36:33,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:36:33,275 INFO L82 PathProgramCache]: Analyzing trace with hash -2091922853, now seen corresponding path program 1 times [2020-09-24 21:36:33,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:36:33,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465733787] [2020-09-24 21:36:33,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:36:33,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:33,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:33,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:33,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:33,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:33,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 21:36:33,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 21:36:33,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 338 [2020-09-24 21:36:33,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:33,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:36:33,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 21:36:33,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-24 21:36:33,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 21:36:33,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:36:33,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:33,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:33,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:33,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:36:33,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:33,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 21:36:33,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:33,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:36:33,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:33,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:36:33,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:33,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:36:33,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465733787] [2020-09-24 21:36:33,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:36:33,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 21:36:33,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654520264] [2020-09-24 21:36:33,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 21:36:33,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:36:33,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 21:36:33,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 21:36:33,899 INFO L87 Difference]: Start difference. First operand 248 states. Second operand 4 states. [2020-09-24 21:36:34,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:36:34,535 INFO L93 Difference]: Finished difference Result 524 states and 685 transitions. [2020-09-24 21:36:34,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 21:36:34,538 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-09-24 21:36:34,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:36:34,558 INFO L225 Difference]: With dead ends: 524 [2020-09-24 21:36:34,558 INFO L226 Difference]: Without dead ends: 253 [2020-09-24 21:36:34,566 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 [2020-09-24 21:36:34,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-09-24 21:36:34,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 226. [2020-09-24 21:36:34,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-09-24 21:36:34,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 249 transitions. [2020-09-24 21:36:34,652 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 249 transitions. Word has length 15 [2020-09-24 21:36:34,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:36:34,652 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 249 transitions. [2020-09-24 21:36:34,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 21:36:34,653 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 249 transitions. [2020-09-24 21:36:34,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-24 21:36:34,654 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:36:34,654 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] [2020-09-24 21:36:34,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:36:34,655 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:36:34,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:36:34,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1052511289, now seen corresponding path program 1 times [2020-09-24 21:36:34,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:36:34,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896073154] [2020-09-24 21:36:34,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:36:34,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:34,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:34,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:34,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:35,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:35,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-24 21:36:35,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 21:36:35,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 803 [2020-09-24 21:36:35,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:35,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:36:35,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-24 21:36:35,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 21:36:35,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:35,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:36:35,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:35,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:35,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:35,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:36:35,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:35,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 21:36:35,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:35,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:36:35,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:35,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:36:35,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:36:35,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:36:35,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896073154] [2020-09-24 21:36:35,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:36:35,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 21:36:35,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9388335] [2020-09-24 21:36:35,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 21:36:35,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:36:35,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 21:36:35,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:36:35,629 INFO L87 Difference]: Start difference. First operand 226 states and 249 transitions. Second operand 8 states. [2020-09-24 21:36:36,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:36:36,743 INFO L93 Difference]: Finished difference Result 318 states and 355 transitions. [2020-09-24 21:36:36,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 21:36:36,744 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-09-24 21:36:36,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:36:36,748 INFO L225 Difference]: With dead ends: 318 [2020-09-24 21:36:36,750 INFO L226 Difference]: Without dead ends: 313 [2020-09-24 21:36:36,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:36:36,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-09-24 21:36:36,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 231. [2020-09-24 21:36:36,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-09-24 21:36:36,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 254 transitions. [2020-09-24 21:36:36,806 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 254 transitions. Word has length 33 [2020-09-24 21:36:36,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:36:36,806 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 254 transitions. [2020-09-24 21:36:36,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 21:36:36,806 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 254 transitions. [2020-09-24 21:36:36,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-24 21:36:36,810 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:36:36,810 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:36:36,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:36:36,811 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:36:36,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:36:36,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1386814406, now seen corresponding path program 1 times [2020-09-24 21:36:36,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:36:36,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394866523] [2020-09-24 21:36:36,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:36:36,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:36,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:36,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:37,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:37,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-24 21:36:37,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:36:37,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 865 [2020-09-24 21:36:37,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:37,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:36:37,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 21:36:37,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-24 21:36:37,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:37,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:36:37,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:37,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:37,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:37,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:36:37,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:37,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 21:36:37,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:37,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:36:37,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:37,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:36:37,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:37,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:36:37,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394866523] [2020-09-24 21:36:37,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:36:37,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 21:36:37,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712795692] [2020-09-24 21:36:37,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 21:36:37,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:36:37,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 21:36:37,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-24 21:36:37,985 INFO L87 Difference]: Start difference. First operand 231 states and 254 transitions. Second operand 9 states. [2020-09-24 21:36:39,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:36:39,778 INFO L93 Difference]: Finished difference Result 390 states and 435 transitions. [2020-09-24 21:36:39,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 21:36:39,779 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-09-24 21:36:39,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:36:39,789 INFO L225 Difference]: With dead ends: 390 [2020-09-24 21:36:39,789 INFO L226 Difference]: Without dead ends: 386 [2020-09-24 21:36:39,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-24 21:36:39,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-09-24 21:36:39,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 303. [2020-09-24 21:36:39,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2020-09-24 21:36:39,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 337 transitions. [2020-09-24 21:36:39,846 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 337 transitions. Word has length 42 [2020-09-24 21:36:39,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:36:39,847 INFO L479 AbstractCegarLoop]: Abstraction has 303 states and 337 transitions. [2020-09-24 21:36:39,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 21:36:39,847 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 337 transitions. [2020-09-24 21:36:39,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-24 21:36:39,848 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:36:39,850 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:36:39,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:36:39,850 INFO L427 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:36:39,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:36:39,851 INFO L82 PathProgramCache]: Analyzing trace with hash 527521680, now seen corresponding path program 1 times [2020-09-24 21:36:39,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:36:39,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529234394] [2020-09-24 21:36:39,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:36:39,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:39,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:39,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:40,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:40,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-24 21:36:40,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:36:40,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 672 [2020-09-24 21:36:40,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:40,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:36:40,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 21:36:40,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-24 21:36:40,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:40,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:36:40,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:40,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:40,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:40,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:36:40,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:40,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:36:40,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:40,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:36:40,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:40,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:36:40,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:40,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:36:40,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529234394] [2020-09-24 21:36:40,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:36:40,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 21:36:40,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741815136] [2020-09-24 21:36:40,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 21:36:40,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:36:40,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 21:36:40,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-24 21:36:40,696 INFO L87 Difference]: Start difference. First operand 303 states and 337 transitions. Second operand 9 states. [2020-09-24 21:36:41,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:36:41,929 INFO L93 Difference]: Finished difference Result 498 states and 552 transitions. [2020-09-24 21:36:41,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 21:36:41,930 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-09-24 21:36:41,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:36:41,933 INFO L225 Difference]: With dead ends: 498 [2020-09-24 21:36:41,933 INFO L226 Difference]: Without dead ends: 303 [2020-09-24 21:36:41,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:36:41,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-09-24 21:36:41,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 274. [2020-09-24 21:36:41,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-09-24 21:36:41,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 300 transitions. [2020-09-24 21:36:41,953 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 300 transitions. Word has length 42 [2020-09-24 21:36:41,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:36:41,954 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 300 transitions. [2020-09-24 21:36:41,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 21:36:41,954 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 300 transitions. [2020-09-24 21:36:41,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-24 21:36:41,956 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:36:41,956 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:36:41,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:36:41,956 INFO L427 AbstractCegarLoop]: === Iteration 5 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:36:41,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:36:41,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1598586176, now seen corresponding path program 1 times [2020-09-24 21:36:41,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:36:41,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114874831] [2020-09-24 21:36:41,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:36:41,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:42,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:42,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:42,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:42,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-24 21:36:42,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:36:42,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 762 [2020-09-24 21:36:42,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:42,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 21:36:42,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:36:42,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-24 21:36:42,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:42,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:36:42,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:42,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:42,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:42,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:36:42,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:42,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:36:42,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:42,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:36:42,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:42,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:36:42,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:42,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:36:42,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114874831] [2020-09-24 21:36:42,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:36:42,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-24 21:36:42,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192769268] [2020-09-24 21:36:42,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 21:36:42,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:36:42,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 21:36:42,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-24 21:36:42,879 INFO L87 Difference]: Start difference. First operand 274 states and 300 transitions. Second operand 10 states. [2020-09-24 21:36:44,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:36:44,173 INFO L93 Difference]: Finished difference Result 343 states and 380 transitions. [2020-09-24 21:36:44,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 21:36:44,173 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2020-09-24 21:36:44,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:36:44,178 INFO L225 Difference]: With dead ends: 343 [2020-09-24 21:36:44,178 INFO L226 Difference]: Without dead ends: 339 [2020-09-24 21:36:44,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:36:44,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-09-24 21:36:44,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 281. [2020-09-24 21:36:44,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-09-24 21:36:44,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 307 transitions. [2020-09-24 21:36:44,194 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 307 transitions. Word has length 46 [2020-09-24 21:36:44,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:36:44,195 INFO L479 AbstractCegarLoop]: Abstraction has 281 states and 307 transitions. [2020-09-24 21:36:44,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 21:36:44,195 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 307 transitions. [2020-09-24 21:36:44,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-24 21:36:44,197 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:36:44,197 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:36:44,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 21:36:44,197 INFO L427 AbstractCegarLoop]: === Iteration 6 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:36:44,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:36:44,198 INFO L82 PathProgramCache]: Analyzing trace with hash 797684937, now seen corresponding path program 1 times [2020-09-24 21:36:44,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:36:44,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535686351] [2020-09-24 21:36:44,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:36:44,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 21:36:44,221 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 21:36:44,221 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 21:36:44,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 21:36:44,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 09:36:44 BoogieIcfgContainer [2020-09-24 21:36:44,250 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 21:36:44,254 INFO L168 Benchmark]: Toolchain (without parser) took 13078.82 ms. Allocated memory was 139.5 MB in the beginning and 361.8 MB in the end (delta: 222.3 MB). Free memory was 101.4 MB in the beginning and 283.8 MB in the end (delta: -182.4 MB). Peak memory consumption was 39.9 MB. Max. memory is 7.1 GB. [2020-09-24 21:36:44,254 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.5 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-09-24 21:36:44,255 INFO L168 Benchmark]: CACSL2BoogieTranslator took 774.47 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 100.5 MB in the beginning and 167.7 MB in the end (delta: -67.2 MB). Peak memory consumption was 25.4 MB. Max. memory is 7.1 GB. [2020-09-24 21:36:44,256 INFO L168 Benchmark]: Boogie Preprocessor took 121.41 ms. Allocated memory is still 202.9 MB. Free memory was 167.7 MB in the beginning and 163.7 MB in the end (delta: 3.9 MB). Peak memory consumption was 3.9 MB. Max. memory is 7.1 GB. [2020-09-24 21:36:44,257 INFO L168 Benchmark]: RCFGBuilder took 1064.17 ms. Allocated memory was 202.9 MB in the beginning and 235.9 MB in the end (delta: 33.0 MB). Free memory was 163.7 MB in the beginning and 201.3 MB in the end (delta: -37.6 MB). Peak memory consumption was 80.9 MB. Max. memory is 7.1 GB. [2020-09-24 21:36:44,258 INFO L168 Benchmark]: TraceAbstraction took 11110.47 ms. Allocated memory was 235.9 MB in the beginning and 361.8 MB in the end (delta: 125.8 MB). Free memory was 201.3 MB in the beginning and 283.8 MB in the end (delta: -82.5 MB). Peak memory consumption was 43.3 MB. Max. memory is 7.1 GB. [2020-09-24 21:36:44,262 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.5 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 774.47 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 100.5 MB in the beginning and 167.7 MB in the end (delta: -67.2 MB). Peak memory consumption was 25.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.41 ms. Allocated memory is still 202.9 MB. Free memory was 167.7 MB in the beginning and 163.7 MB in the end (delta: 3.9 MB). Peak memory consumption was 3.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1064.17 ms. Allocated memory was 202.9 MB in the beginning and 235.9 MB in the end (delta: 33.0 MB). Free memory was 163.7 MB in the beginning and 201.3 MB in the end (delta: -37.6 MB). Peak memory consumption was 80.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11110.47 ms. Allocated memory was 235.9 MB in the beginning and 361.8 MB in the end (delta: 125.8 MB). Free memory was 201.3 MB in the beginning and 283.8 MB in the end (delta: -82.5 MB). Peak memory consumption was 43.3 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, 258 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 11.0s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 6.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1202 SDtfs, 1589 SDslu, 2622 SDs, 0 SdLazy, 4260 SolverSat, 184 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=303occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 5 MinimizatonAttempts, 279 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 4.2s InterpolantComputationTime, 230 NumberOfCodeBlocks, 230 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 173 ConstructedInterpolants, 0 QuantifiedInterpolants, 58754 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 4/8 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...