/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 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=NARROWEST --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 -i ../../../trunk/examples/svcomp/loops/nec11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 11:09:46,086 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 11:09:46,089 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 11:09:46,112 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 11:09:46,112 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 11:09:46,113 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 11:09:46,114 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 11:09:46,116 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 11:09:46,118 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 11:09:46,119 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 11:09:46,120 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 11:09:46,121 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 11:09:46,121 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 11:09:46,122 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 11:09:46,123 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 11:09:46,124 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 11:09:46,125 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 11:09:46,125 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 11:09:46,127 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 11:09:46,129 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 11:09:46,130 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 11:09:46,131 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 11:09:46,132 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 11:09:46,133 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 11:09:46,135 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 11:09:46,135 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 11:09:46,136 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 11:09:46,136 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 11:09:46,137 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 11:09:46,138 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 11:09:46,138 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 11:09:46,139 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 11:09:46,139 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 11:09:46,140 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 11:09:46,141 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 11:09:46,141 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 11:09:46,142 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 11:09:46,142 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 11:09:46,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 11:09:46,143 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 11:09:46,144 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 11:09:46,145 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 [2020-10-13 11:09:46,180 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 11:09:46,180 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 11:09:46,183 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 11:09:46,183 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 11:09:46,183 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 11:09:46,184 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 11:09:46,184 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 11:09:46,184 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 11:09:46,184 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 11:09:46,184 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 11:09:46,185 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 11:09:46,185 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 11:09:46,186 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 11:09:46,186 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 11:09:46,186 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 11:09:46,187 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 11:09:46,187 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 11:09:46,187 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 11:09:46,187 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 11:09:46,187 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 11:09:46,188 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 11:09:46,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 11:09:46,188 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 11:09:46,189 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 11:09:46,189 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 11:09:46,189 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 11:09:46,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 11:09:46,189 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 11:09:46,190 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 11:09:46,190 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 -> 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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 11:09:46,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 11:09:46,514 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 11:09:46,517 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 11:09:46,521 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 11:09:46,521 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 11:09:46,522 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/nec11.c [2020-10-13 11:09:46,588 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/115ea8967/ae32da4d507a4bc4b9bcf3d54df80b4e/FLAGb8786ac36 [2020-10-13 11:09:46,983 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 11:09:46,984 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/nec11.c [2020-10-13 11:09:46,990 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/115ea8967/ae32da4d507a4bc4b9bcf3d54df80b4e/FLAGb8786ac36 [2020-10-13 11:09:47,373 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/115ea8967/ae32da4d507a4bc4b9bcf3d54df80b4e [2020-10-13 11:09:47,383 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 11:09:47,385 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 11:09:47,386 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 11:09:47,386 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 11:09:47,389 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 11:09:47,390 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:09:47" (1/1) ... [2020-10-13 11:09:47,393 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@db9ac37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:09:47, skipping insertion in model container [2020-10-13 11:09:47,393 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:09:47" (1/1) ... [2020-10-13 11:09:47,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 11:09:47,416 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 11:09:47,602 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 11:09:47,605 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 11:09:47,618 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 11:09:47,628 INFO L208 MainTranslator]: Completed translation [2020-10-13 11:09:47,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:09:47 WrapperNode [2020-10-13 11:09:47,628 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 11:09:47,629 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 11:09:47,629 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 11:09:47,629 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 11:09:47,638 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:09:47" (1/1) ... [2020-10-13 11:09:47,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:09:47" (1/1) ... [2020-10-13 11:09:47,725 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:09:47" (1/1) ... [2020-10-13 11:09:47,726 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:09:47" (1/1) ... [2020-10-13 11:09:47,729 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:09:47" (1/1) ... [2020-10-13 11:09:47,739 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:09:47" (1/1) ... [2020-10-13 11:09:47,740 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:09:47" (1/1) ... [2020-10-13 11:09:47,741 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 11:09:47,741 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 11:09:47,741 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 11:09:47,741 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 11:09:47,742 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:09:47" (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 [2020-10-13 11:09:47,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 11:09:47,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 11:09:47,790 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 11:09:47,790 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 11:09:47,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 11:09:47,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 11:09:47,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 11:09:47,791 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 11:09:47,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 11:09:47,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 11:09:47,967 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 11:09:47,967 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 11:09:47,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:09:47 BoogieIcfgContainer [2020-10-13 11:09:47,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 11:09:47,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 11:09:47,972 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 11:09:47,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 11:09:47,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:09:47" (1/3) ... [2020-10-13 11:09:47,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fb3d314 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:09:47, skipping insertion in model container [2020-10-13 11:09:47,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:09:47" (2/3) ... [2020-10-13 11:09:47,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fb3d314 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:09:47, skipping insertion in model container [2020-10-13 11:09:47,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:09:47" (3/3) ... [2020-10-13 11:09:47,979 INFO L109 eAbstractionObserver]: Analyzing ICFG nec11.c [2020-10-13 11:09:47,988 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 11:09:47,995 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 11:09:48,008 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 11:09:48,031 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 11:09:48,031 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 11:09:48,031 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 11:09:48,031 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 11:09:48,031 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 11:09:48,032 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 11:09:48,032 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 11:09:48,032 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 11:09:48,048 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-10-13 11:09:48,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-13 11:09:48,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:09:48,054 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:09:48,054 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:09:48,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:09:48,059 INFO L82 PathProgramCache]: Analyzing trace with hash -147882559, now seen corresponding path program 1 times [2020-10-13 11:09:48,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:09:48,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597942625] [2020-10-13 11:09:48,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:09:48,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:48,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:48,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:48,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 11:09:48,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:48,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-13 11:09:48,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:48,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:09:48,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 11:09:48,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:09:48,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 11:09:48,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:09:48,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:48,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:48,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:48,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:09:48,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:48,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 11:09:48,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:48,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:09:48,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:48,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:09:48,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:48,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:09:48,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597942625] [2020-10-13 11:09:48,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:09:48,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-13 11:09:48,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999285972] [2020-10-13 11:09:48,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-13 11:09:48,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:09:48,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-13 11:09:48,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-13 11:09:48,247 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-10-13 11:09:48,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:09:48,269 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-10-13 11:09:48,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-13 11:09:48,271 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-13 11:09:48,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:09:48,279 INFO L225 Difference]: With dead ends: 32 [2020-10-13 11:09:48,279 INFO L226 Difference]: Without dead ends: 13 [2020-10-13 11:09:48,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-13 11:09:48,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-13 11:09:48,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-13 11:09:48,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-13 11:09:48,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-10-13 11:09:48,319 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-10-13 11:09:48,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:09:48,319 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-10-13 11:09:48,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-13 11:09:48,320 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-10-13 11:09:48,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-13 11:09:48,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:09:48,321 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:09:48,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 11:09:48,321 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:09:48,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:09:48,322 INFO L82 PathProgramCache]: Analyzing trace with hash -158041290, now seen corresponding path program 1 times [2020-10-13 11:09:48,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:09:48,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737726995] [2020-10-13 11:09:48,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:09:48,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-13 11:09:48,338 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-13 11:09:48,338 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-13 11:09:48,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 11:09:48,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 11:09:48 BoogieIcfgContainer [2020-10-13 11:09:48,358 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-13 11:09:48,361 INFO L168 Benchmark]: Toolchain (without parser) took 975.20 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 103.6 MB in the beginning and 144.8 MB in the end (delta: -41.2 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-10-13 11:09:48,362 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-10-13 11:09:48,363 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.03 ms. Allocated memory is still 147.3 MB. Free memory was 103.3 MB in the beginning and 93.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-10-13 11:09:48,364 INFO L168 Benchmark]: Boogie Preprocessor took 111.94 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 93.8 MB in the beginning and 181.3 MB in the end (delta: -87.5 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-10-13 11:09:48,365 INFO L168 Benchmark]: RCFGBuilder took 229.85 ms. Allocated memory is still 202.9 MB. Free memory was 181.3 MB in the beginning and 169.1 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-10-13 11:09:48,366 INFO L168 Benchmark]: TraceAbstraction took 385.78 ms. Allocated memory is still 202.9 MB. Free memory was 168.4 MB in the beginning and 144.8 MB in the end (delta: 23.6 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. [2020-10-13 11:09:48,370 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 243.03 ms. Allocated memory is still 147.3 MB. Free memory was 103.3 MB in the beginning and 93.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 111.94 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 93.8 MB in the beginning and 181.3 MB in the end (delta: -87.5 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 229.85 ms. Allocated memory is still 202.9 MB. Free memory was 181.3 MB in the beginning and 169.1 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 385.78 ms. Allocated memory is still 202.9 MB. Free memory was 168.4 MB in the beginning and 144.8 MB in the end (delta: 23.6 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L13] int a[5]; [L14] int len=0; [L15] _Bool c=__VERIFIER_nondet_bool(); [L16] int i; [L19] COND FALSE !(\read(c)) [L28] CALL __VERIFIER_assert(len==5) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 21 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred 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, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 81 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...