/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.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 SequenceOfStatements --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=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loops/nec20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:35:57,793 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:35:57,795 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:35:57,830 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:35:57,831 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:35:57,833 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:35:57,834 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:35:57,836 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:35:57,839 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:35:57,840 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:35:57,841 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:35:57,842 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:35:57,843 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:35:57,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:35:57,845 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:35:57,847 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:35:57,847 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:35:57,851 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:35:57,853 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:35:57,856 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:35:57,857 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:35:57,859 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:35:57,860 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:35:57,861 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:35:57,864 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:35:57,865 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:35:57,865 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:35:57,866 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:35:57,867 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:35:57,868 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:35:57,868 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:35:57,869 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:35:57,870 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:35:57,871 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:35:57,872 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:35:57,872 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:35:57,873 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:35:57,873 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:35:57,874 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:35:57,875 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:35:57,876 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:35:57,884 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 [2020-10-27 20:35:57,934 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:35:57,936 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:35:57,938 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:35:57,938 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:35:57,938 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:35:57,939 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:35:57,939 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:35:57,939 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:35:57,939 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:35:57,940 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:35:57,940 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:35:57,940 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:35:57,940 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:35:57,940 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:35:57,941 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:35:57,941 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:35:57,941 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:35:57,941 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:35:57,941 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:35:57,942 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:35:57,942 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:35:57,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:35:57,942 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:35:57,942 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:35:57,943 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:35:57,943 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:35:57,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:35:57,943 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:35:57,943 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:35:57,943 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:35:58,286 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:35:58,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:35:58,319 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:35:58,321 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:35:58,321 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:35:58,322 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/nec20.c [2020-10-27 20:35:58,391 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d8677dcee/2b20f37a1f7a4b13940b77d888238219/FLAG250d3f1b4 [2020-10-27 20:35:59,063 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:35:59,064 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/nec20.c [2020-10-27 20:35:59,071 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d8677dcee/2b20f37a1f7a4b13940b77d888238219/FLAG250d3f1b4 [2020-10-27 20:35:59,411 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d8677dcee/2b20f37a1f7a4b13940b77d888238219 [2020-10-27 20:35:59,414 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:35:59,421 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:35:59,422 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:35:59,423 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:35:59,426 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:35:59,427 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:35:59" (1/1) ... [2020-10-27 20:35:59,431 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@488c1b3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:59, skipping insertion in model container [2020-10-27 20:35:59,431 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:35:59" (1/1) ... [2020-10-27 20:35:59,439 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:35:59,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:35:59,611 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:35:59,620 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:35:59,639 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:35:59,655 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:35:59,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:59 WrapperNode [2020-10-27 20:35:59,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:35:59,657 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:35:59,657 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:35:59,657 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:35:59,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:59" (1/1) ... [2020-10-27 20:35:59,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:59" (1/1) ... [2020-10-27 20:35:59,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:59" (1/1) ... [2020-10-27 20:35:59,678 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:59" (1/1) ... [2020-10-27 20:35:59,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:59" (1/1) ... [2020-10-27 20:35:59,689 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:59" (1/1) ... [2020-10-27 20:35:59,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:59" (1/1) ... [2020-10-27 20:35:59,692 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:35:59,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:35:59,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:35:59,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:35:59,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:59" (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 [2020-10-27 20:35:59,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:35:59,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:35:59,770 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:35:59,770 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:35:59,771 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:35:59,771 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:35:59,771 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:35:59,772 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:35:59,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:35:59,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-27 20:35:59,774 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:35:59,774 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 20:35:59,775 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:35:59,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:35:59,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:35:59,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:35:59,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:35:59,776 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:35:59,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:36:00,187 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:36:00,188 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 20:36:00,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:36:00 BoogieIcfgContainer [2020-10-27 20:36:00,191 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:36:00,195 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:36:00,195 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:36:00,199 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:36:00,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:35:59" (1/3) ... [2020-10-27 20:36:00,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d9eb098 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:36:00, skipping insertion in model container [2020-10-27 20:36:00,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:59" (2/3) ... [2020-10-27 20:36:00,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d9eb098 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:36:00, skipping insertion in model container [2020-10-27 20:36:00,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:36:00" (3/3) ... [2020-10-27 20:36:00,203 INFO L111 eAbstractionObserver]: Analyzing ICFG nec20.c [2020-10-27 20:36:00,216 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:36:00,221 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:36:00,235 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:36:00,308 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:36:00,308 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:36:00,308 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:36:00,308 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:36:00,309 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:36:00,309 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:36:00,309 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:36:00,309 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:36:00,334 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-27 20:36:00,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 20:36:00,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:00,341 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:00,342 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:00,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:00,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1161805481, now seen corresponding path program 1 times [2020-10-27 20:36:00,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:00,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485516727] [2020-10-27 20:36:00,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:00,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:00,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:00,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:00,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 20:36:00,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:00,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 232 [2020-10-27 20:36:00,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:00,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:36:00,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:36:00,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 20:36:00,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 20:36:00,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:00,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:00,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:01,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:01,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:01,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:01,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 20:36:01,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:01,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:01,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:01,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:01,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:01,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:36:01,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485516727] [2020-10-27 20:36:01,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:36:01,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:36:01,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906044735] [2020-10-27 20:36:01,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:36:01,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:01,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:36:01,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:36:01,046 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 4 states. [2020-10-27 20:36:01,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:01,229 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2020-10-27 20:36:01,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:36:01,231 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-27 20:36:01,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:01,239 INFO L225 Difference]: With dead ends: 48 [2020-10-27 20:36:01,239 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 20:36:01,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:36:01,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 20:36:01,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-27 20:36:01,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-27 20:36:01,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-27 20:36:01,287 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-10-27 20:36:01,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:01,287 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-27 20:36:01,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:36:01,288 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-27 20:36:01,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 20:36:01,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:01,289 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:01,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:36:01,290 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:01,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:01,290 INFO L82 PathProgramCache]: Analyzing trace with hash 36405024, now seen corresponding path program 1 times [2020-10-27 20:36:01,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:01,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899558145] [2020-10-27 20:36:01,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:01,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 20:36:01,327 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 20:36:01,327 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 20:36:01,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:36:01,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 08:36:01 BoogieIcfgContainer [2020-10-27 20:36:01,350 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 20:36:01,353 INFO L168 Benchmark]: Toolchain (without parser) took 1935.33 ms. Allocated memory is still 151.0 MB. Free memory was 125.4 MB in the beginning and 79.1 MB in the end (delta: 46.3 MB). Peak memory consumption was 46.7 MB. Max. memory is 8.0 GB. [2020-10-27 20:36:01,353 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 125.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 20:36:01,355 INFO L168 Benchmark]: CACSL2BoogieTranslator took 233.94 ms. Allocated memory is still 151.0 MB. Free memory was 124.8 MB in the beginning and 115.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-27 20:36:01,356 INFO L168 Benchmark]: Boogie Preprocessor took 35.12 ms. Allocated memory is still 151.0 MB. Free memory was 115.3 MB in the beginning and 114.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-27 20:36:01,357 INFO L168 Benchmark]: RCFGBuilder took 497.88 ms. Allocated memory is still 151.0 MB. Free memory was 113.8 MB in the beginning and 99.5 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-10-27 20:36:01,358 INFO L168 Benchmark]: TraceAbstraction took 1154.92 ms. Allocated memory is still 151.0 MB. Free memory was 98.9 MB in the beginning and 79.1 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.4 MB. Max. memory is 8.0 GB. [2020-10-27 20:36:01,362 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 125.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 233.94 ms. Allocated memory is still 151.0 MB. Free memory was 124.8 MB in the beginning and 115.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.12 ms. Allocated memory is still 151.0 MB. Free memory was 115.3 MB in the beginning and 114.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 497.88 ms. Allocated memory is still 151.0 MB. Free memory was 113.8 MB in the beginning and 99.5 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1154.92 ms. Allocated memory is still 151.0 MB. Free memory was 98.9 MB in the beginning and 79.1 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int b; [L15] _Bool k=__VERIFIER_nondet_bool(); [L16] unsigned int i,n,j; [L17] int a[1025]; [L19] COND TRUE \read(k) [L20] n=0 [L25] i=0 [L26] j=__VERIFIER_nondet_uint() [L27] COND FALSE !(j > 10000) [L30] COND TRUE i <= n [L31] i++ [L32] j= j +2 [L30] COND FALSE !(i <= n) [L35] a[i]=0 [L36] CALL __VERIFIER_assert(j<1025) [L7] COND TRUE !(cond) [L8] CALL reach_error() [L3] __assert_fail("0", "nec20.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 23 SDtfs, 22 SDslu, 11 SDs, 0 SdLazy, 26 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 33 NumberOfCodeBlocks, 33 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 15 ConstructedInterpolants, 0 QuantifiedInterpolants, 1020 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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...