/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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/recursive/Ackermann02.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-15 01:58:52,357 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 01:58:52,360 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 01:58:52,402 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 01:58:52,402 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 01:58:52,403 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 01:58:52,405 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 01:58:52,406 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 01:58:52,408 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 01:58:52,409 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 01:58:52,409 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 01:58:52,411 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 01:58:52,411 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 01:58:52,412 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 01:58:52,413 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 01:58:52,414 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 01:58:52,414 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 01:58:52,415 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 01:58:52,417 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 01:58:52,419 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 01:58:52,420 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 01:58:52,421 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 01:58:52,422 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 01:58:52,423 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 01:58:52,426 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 01:58:52,426 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 01:58:52,426 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 01:58:52,427 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 01:58:52,427 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 01:58:52,428 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 01:58:52,429 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 01:58:52,429 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 01:58:52,430 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 01:58:52,432 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 01:58:52,433 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 01:58:52,434 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 01:58:52,434 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 01:58:52,434 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 01:58:52,435 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 01:58:52,436 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 01:58:52,436 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 01:58:52,437 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 [2020-10-15 01:58:52,459 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 01:58:52,459 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 01:58:52,460 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 01:58:52,460 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 01:58:52,460 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 01:58:52,461 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 01:58:52,461 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 01:58:52,461 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 01:58:52,461 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 01:58:52,461 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 01:58:52,462 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 01:58:52,462 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 01:58:52,462 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 01:58:52,462 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 01:58:52,462 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 01:58:52,462 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 01:58:52,463 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 01:58:52,463 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 01:58:52,463 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 01:58:52,463 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 01:58:52,463 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 01:58:52,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 01:58:52,464 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 01:58:52,464 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 01:58:52,464 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 01:58:52,464 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 01:58:52,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 01:58:52,465 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 01:58:52,465 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 01:58:52,465 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-15 01:58:52,769 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 01:58:52,787 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 01:58:52,791 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 01:58:52,793 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 01:58:52,794 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 01:58:52,794 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann02.c [2020-10-15 01:58:52,861 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/183b1d179/b9110a75d34e4611a4cb9ab58dca67bf/FLAG38bafd4af [2020-10-15 01:58:53,283 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 01:58:53,283 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/Ackermann02.c [2020-10-15 01:58:53,289 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/183b1d179/b9110a75d34e4611a4cb9ab58dca67bf/FLAG38bafd4af [2020-10-15 01:58:53,658 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/183b1d179/b9110a75d34e4611a4cb9ab58dca67bf [2020-10-15 01:58:53,666 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 01:58:53,667 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-15 01:58:53,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 01:58:53,668 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 01:58:53,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 01:58:53,673 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:58:53" (1/1) ... [2020-10-15 01:58:53,676 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1604f3be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:58:53, skipping insertion in model container [2020-10-15 01:58:53,676 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:58:53" (1/1) ... [2020-10-15 01:58:53,684 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 01:58:53,700 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 01:58:53,882 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 01:58:53,888 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 01:58:53,908 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 01:58:53,924 INFO L208 MainTranslator]: Completed translation [2020-10-15 01:58:53,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:58:53 WrapperNode [2020-10-15 01:58:53,930 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 01:58:53,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 01:58:53,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 01:58:53,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 01:58:53,945 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:58:53" (1/1) ... [2020-10-15 01:58:53,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:58:53" (1/1) ... [2020-10-15 01:58:53,951 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:58:53" (1/1) ... [2020-10-15 01:58:53,951 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:58:53" (1/1) ... [2020-10-15 01:58:53,955 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:58:53" (1/1) ... [2020-10-15 01:58:53,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:58:53" (1/1) ... [2020-10-15 01:58:53,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:58:53" (1/1) ... [2020-10-15 01:58:53,959 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 01:58:53,960 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 01:58:53,960 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 01:58:53,960 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 01:58:53,961 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:58:53" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 01:58:54,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-15 01:58:54,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 01:58:54,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-10-15 01:58:54,122 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-15 01:58:54,122 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-15 01:58:54,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-15 01:58:54,123 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-10-15 01:58:54,123 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-15 01:58:54,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-15 01:58:54,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 01:58:54,302 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 01:58:54,302 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-15 01:58:54,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:58:54 BoogieIcfgContainer [2020-10-15 01:58:54,305 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 01:58:54,306 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 01:58:54,306 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 01:58:54,309 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 01:58:54,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:58:53" (1/3) ... [2020-10-15 01:58:54,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1875276 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:58:54, skipping insertion in model container [2020-10-15 01:58:54,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:58:53" (2/3) ... [2020-10-15 01:58:54,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1875276 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:58:54, skipping insertion in model container [2020-10-15 01:58:54,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:58:54" (3/3) ... [2020-10-15 01:58:54,313 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann02.c [2020-10-15 01:58:54,323 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-15 01:58:54,329 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 01:58:54,343 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-15 01:58:54,365 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-15 01:58:54,366 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-15 01:58:54,366 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-15 01:58:54,366 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 01:58:54,366 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 01:58:54,366 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-15 01:58:54,366 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 01:58:54,367 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 01:58:54,384 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-15 01:58:54,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 01:58:54,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:58:54,392 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 01:58:54,392 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:58:54,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:58:54,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1796234678, now seen corresponding path program 1 times [2020-10-15 01:58:54,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:58:54,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063807827] [2020-10-15 01:58:54,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:58:54,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:58:54,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:54,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:58:54,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-15 01:58:54,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:58:54,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-15 01:58:54,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:58:54,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:58:54,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 01:58:54,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 01:58:54,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-15 01:58:54,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-15 01:58:54,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:58:54,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:58:54,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:54,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:58:54,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 01:58:54,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:58:54,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 01:58:54,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:58:54,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:58:54,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:58:54,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:58:54,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:58:54,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 01:58:54,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-15 01:58:54,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:58:54,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:54,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:58:54,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 01:58:54,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:58:54,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-15 01:58:54,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:58:54,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:58:54,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 01:58:54,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:58:54,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-15 01:58:54,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 01:58:54,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 01:58:54,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063807827] [2020-10-15 01:58:54,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 01:58:54,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 01:58:54,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379207914] [2020-10-15 01:58:54,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 01:58:54,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:58:54,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 01:58:54,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-15 01:58:54,795 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-10-15 01:58:54,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 01:58:54,978 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2020-10-15 01:58:54,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 01:58:54,981 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-15 01:58:54,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 01:58:54,991 INFO L225 Difference]: With dead ends: 42 [2020-10-15 01:58:54,992 INFO L226 Difference]: Without dead ends: 28 [2020-10-15 01:58:54,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-15 01:58:55,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-15 01:58:55,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-15 01:58:55,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-15 01:58:55,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-10-15 01:58:55,046 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 15 [2020-10-15 01:58:55,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 01:58:55,046 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-10-15 01:58:55,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 01:58:55,047 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-10-15 01:58:55,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 01:58:55,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:58:55,050 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 01:58:55,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 01:58:55,050 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:58:55,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:58:55,051 INFO L82 PathProgramCache]: Analyzing trace with hash -895156504, now seen corresponding path program 1 times [2020-10-15 01:58:55,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:58:55,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854975238] [2020-10-15 01:58:55,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:58:55,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:58:55,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:55,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:58:55,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-15 01:58:55,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:58:55,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-10-15 01:58:55,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:58:55,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:58:55,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 01:58:55,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 01:58:55,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-15 01:58:55,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-15 01:58:55,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:58:55,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:58:55,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:55,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:58:55,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 01:58:55,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:58:55,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 01:58:55,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:58:55,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:58:55,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:58:55,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:58:55,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:58:55,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 01:58:55,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-15 01:58:55,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:58:55,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:55,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:58:55,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-15 01:58:55,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:58:55,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-15 01:58:55,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:58:55,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:58:55,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 01:58:55,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:58:55,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-15 01:58:55,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 01:58:55,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-15 01:58:55,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:58:55,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:55,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:58:55,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 01:58:55,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:58:55,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-15 01:58:55,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:58:55,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:58:55,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 01:58:55,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:58:55,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-15 01:58:55,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-15 01:58:55,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 01:58:55,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854975238] [2020-10-15 01:58:55,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 01:58:55,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-15 01:58:55,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826155337] [2020-10-15 01:58:55,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 01:58:55,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:58:55,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 01:58:55,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-15 01:58:55,422 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand 6 states. [2020-10-15 01:58:55,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 01:58:55,575 INFO L93 Difference]: Finished difference Result 61 states and 102 transitions. [2020-10-15 01:58:55,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 01:58:55,576 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-15 01:58:55,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 01:58:55,579 INFO L225 Difference]: With dead ends: 61 [2020-10-15 01:58:55,579 INFO L226 Difference]: Without dead ends: 39 [2020-10-15 01:58:55,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-15 01:58:55,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-15 01:58:55,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-15 01:58:55,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-15 01:58:55,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 56 transitions. [2020-10-15 01:58:55,601 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 56 transitions. Word has length 22 [2020-10-15 01:58:55,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 01:58:55,601 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 56 transitions. [2020-10-15 01:58:55,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 01:58:55,602 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 56 transitions. [2020-10-15 01:58:55,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 01:58:55,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:58:55,607 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 01:58:55,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 01:58:55,607 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:58:55,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:58:55,608 INFO L82 PathProgramCache]: Analyzing trace with hash 687949058, now seen corresponding path program 2 times [2020-10-15 01:58:55,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:58:55,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224679067] [2020-10-15 01:58:55,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:58:55,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:58:55,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:55,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:58:55,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-15 01:58:55,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:58:55,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-15 01:58:55,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:58:55,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:58:55,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 01:58:55,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-15 01:58:55,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-15 01:58:55,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 01:58:55,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:58:55,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:58:55,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:55,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:58:55,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 01:58:55,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:58:55,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 01:58:55,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:58:55,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:58:55,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:58:55,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:58:55,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:58:55,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 01:58:55,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-15 01:58:55,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:58:55,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:55,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:58:55,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-15 01:58:55,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:58:55,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-15 01:58:55,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:58:55,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:58:55,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 01:58:55,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-15 01:58:55,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-15 01:58:55,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 01:58:55,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-15 01:58:55,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:58:55,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:55,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:58:55,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-15 01:58:55,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:58:55,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-15 01:58:55,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:58:55,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:58:55,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 01:58:55,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-15 01:58:55,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-15 01:58:55,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 01:58:55,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-15 01:58:55,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:58:55,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:55,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:58:55,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 01:58:55,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:58:55,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 01:58:55,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:58:55,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:58:55,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 01:58:55,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:58:55,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 01:58:55,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 01:58:55,847 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-15 01:58:55,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224679067] [2020-10-15 01:58:55,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 01:58:55,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-15 01:58:55,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125368705] [2020-10-15 01:58:55,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 01:58:55,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:58:55,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 01:58:55,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 01:58:55,849 INFO L87 Difference]: Start difference. First operand 39 states and 56 transitions. Second operand 4 states. [2020-10-15 01:58:55,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 01:58:55,902 INFO L93 Difference]: Finished difference Result 74 states and 133 transitions. [2020-10-15 01:58:55,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 01:58:55,903 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-15 01:58:55,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 01:58:55,906 INFO L225 Difference]: With dead ends: 74 [2020-10-15 01:58:55,906 INFO L226 Difference]: Without dead ends: 43 [2020-10-15 01:58:55,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 01:58:55,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-15 01:58:55,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-15 01:58:55,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-15 01:58:55,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 66 transitions. [2020-10-15 01:58:55,922 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 66 transitions. Word has length 29 [2020-10-15 01:58:55,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 01:58:55,923 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 66 transitions. [2020-10-15 01:58:55,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 01:58:55,923 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 66 transitions. [2020-10-15 01:58:55,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-15 01:58:55,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:58:55,925 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 01:58:55,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 01:58:55,926 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:58:55,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:58:55,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1711672813, now seen corresponding path program 1 times [2020-10-15 01:58:55,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:58:55,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587647628] [2020-10-15 01:58:55,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:58:55,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-15 01:58:55,942 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-15 01:58:55,942 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-15 01:58:55,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 01:58:55,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 01:58:55 BoogieIcfgContainer [2020-10-15 01:58:55,963 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-15 01:58:55,966 INFO L168 Benchmark]: Toolchain (without parser) took 2298.26 ms. Allocated memory was 148.9 MB in the beginning and 231.2 MB in the end (delta: 82.3 MB). Free memory was 105.3 MB in the beginning and 143.4 MB in the end (delta: -38.1 MB). Peak memory consumption was 44.2 MB. Max. memory is 7.1 GB. [2020-10-15 01:58:55,967 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 148.9 MB. Free memory was 123.4 MB in the beginning and 123.0 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-10-15 01:58:55,968 INFO L168 Benchmark]: CACSL2BoogieTranslator took 262.94 ms. Allocated memory is still 148.9 MB. Free memory was 105.3 MB in the beginning and 95.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-10-15 01:58:55,969 INFO L168 Benchmark]: Boogie Preprocessor took 27.91 ms. Allocated memory is still 148.9 MB. Free memory was 95.6 MB in the beginning and 94.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-10-15 01:58:55,970 INFO L168 Benchmark]: RCFGBuilder took 345.59 ms. Allocated memory was 148.9 MB in the beginning and 204.5 MB in the end (delta: 55.6 MB). Free memory was 94.3 MB in the beginning and 170.7 MB in the end (delta: -76.4 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-10-15 01:58:55,971 INFO L168 Benchmark]: TraceAbstraction took 1657.49 ms. Allocated memory was 204.5 MB in the beginning and 231.2 MB in the end (delta: 26.7 MB). Free memory was 170.7 MB in the beginning and 143.4 MB in the end (delta: 27.3 MB). Peak memory consumption was 54.1 MB. Max. memory is 7.1 GB. [2020-10-15 01:58:55,975 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 148.9 MB. Free memory was 123.4 MB in the beginning and 123.0 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 262.94 ms. Allocated memory is still 148.9 MB. Free memory was 105.3 MB in the beginning and 95.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.91 ms. Allocated memory is still 148.9 MB. Free memory was 95.6 MB in the beginning and 94.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 345.59 ms. Allocated memory was 148.9 MB in the beginning and 204.5 MB in the end (delta: 55.6 MB). Free memory was 94.3 MB in the beginning and 170.7 MB in the end (delta: -76.4 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1657.49 ms. Allocated memory was 204.5 MB in the beginning and 231.2 MB in the end (delta: 26.7 MB). Free memory was 170.7 MB in the beginning and 143.4 MB in the end (delta: 27.3 MB). Peak memory consumption was 54.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 43]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L26] int m = __VERIFIER_nondet_int(); [L27] COND FALSE !(m < 0 || m > 3) [L32] int n = __VERIFIER_nondet_int(); [L33] COND FALSE !(n < 0 || n > 23) [L39] CALL, EXPR ackermann(m,n) [L15] COND FALSE !(m==0) [L18] COND TRUE n==0 [L19] CALL, EXPR ackermann(m-1,1) [L15] COND FALSE !(m==0) [L18] COND FALSE !(n==0) [L21] CALL, EXPR ackermann(m,n-1) [L15] COND FALSE !(m==0) [L18] COND TRUE n==0 [L19] CALL, EXPR ackermann(m-1,1) [L15] COND TRUE m==0 [L16] return n+1; [L19] RET, EXPR ackermann(m-1,1) [L19] return ackermann(m-1,1); [L21] RET, EXPR ackermann(m,n-1) [L21] CALL, EXPR ackermann(m-1,ackermann(m,n-1)) [L15] COND TRUE m==0 [L16] return n+1; [L21] RET, EXPR ackermann(m-1,ackermann(m,n-1)) [L21] return ackermann(m-1,ackermann(m,n-1)); [L19] RET, EXPR ackermann(m-1,1) [L19] return ackermann(m-1,1); [L39] RET, EXPR ackermann(m,n) [L39] int result = ackermann(m,n); [L40] COND FALSE !(m < 2 || result >= 4) [L43] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.5s, OverallIterations: 4, TraceHistogramMax: 5, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 75 SDtfs, 43 SDslu, 134 SDs, 0 SdLazy, 128 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred 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: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 108 NumberOfCodeBlocks, 108 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 63 ConstructedInterpolants, 0 QuantifiedInterpolants, 2359 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 16/19 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...