/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 03:09:53,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 03:09:53,251 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 03:09:53,296 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 03:09:53,297 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 03:09:53,308 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 03:09:53,311 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 03:09:53,314 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 03:09:53,317 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 03:09:53,321 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 03:09:53,322 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 03:09:53,323 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 03:09:53,323 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 03:09:53,326 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 03:09:53,329 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 03:09:53,331 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 03:09:53,332 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 03:09:53,333 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 03:09:53,335 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 03:09:53,343 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 03:09:53,344 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 03:09:53,345 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 03:09:53,347 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 03:09:53,348 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 03:09:53,352 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 03:09:53,352 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 03:09:53,353 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 03:09:53,356 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 03:09:53,356 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 03:09:53,357 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 03:09:53,357 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 03:09:53,358 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 03:09:53,359 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 03:09:53,360 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 03:09:53,361 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 03:09:53,362 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 03:09:53,362 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 03:09:53,363 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 03:09:53,363 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 03:09:53,364 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 03:09:53,365 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 03:09:53,366 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 03:09:53,415 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 03:09:53,415 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 03:09:53,418 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 03:09:53,418 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 03:09:53,418 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 03:09:53,418 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 03:09:53,419 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 03:09:53,419 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 03:09:53,419 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 03:09:53,419 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 03:09:53,420 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 03:09:53,421 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 03:09:53,421 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 03:09:53,421 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 03:09:53,421 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 03:09:53,422 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 03:09:53,422 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 03:09:53,422 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 03:09:53,422 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 03:09:53,422 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 03:09:53,423 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 03:09:53,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 03:09:53,423 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 03:09:53,423 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 03:09:53,423 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 03:09:53,424 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 03:09:53,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 03:09:53,424 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 03:09:53,424 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 03:09:53,424 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; [2020-09-25 03:09:53,863 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 03:09:53,888 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 03:09:53,893 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 03:09:53,895 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 03:09:53,895 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 03:09:53,897 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-1.c [2020-09-25 03:09:53,977 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b6274bfc/699e684bd2e14220afb167b14468ea18/FLAG3dee1c53e [2020-09-25 03:09:54,462 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 03:09:54,463 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_2-1.c [2020-09-25 03:09:54,473 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b6274bfc/699e684bd2e14220afb167b14468ea18/FLAG3dee1c53e [2020-09-25 03:09:54,815 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b6274bfc/699e684bd2e14220afb167b14468ea18 [2020-09-25 03:09:54,828 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 03:09:54,834 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 03:09:54,836 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 03:09:54,836 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 03:09:54,840 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 03:09:54,841 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 03:09:54" (1/1) ... [2020-09-25 03:09:54,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22f7f464 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:09:54, skipping insertion in model container [2020-09-25 03:09:54,846 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 03:09:54" (1/1) ... [2020-09-25 03:09:54,855 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 03:09:54,881 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 03:09:55,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 03:09:55,099 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 03:09:55,120 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 03:09:55,138 INFO L208 MainTranslator]: Completed translation [2020-09-25 03:09:55,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:09:55 WrapperNode [2020-09-25 03:09:55,139 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 03:09:55,140 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 03:09:55,140 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 03:09:55,140 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 03:09:55,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:09:55" (1/1) ... [2020-09-25 03:09:55,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:09:55" (1/1) ... [2020-09-25 03:09:55,241 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:09:55" (1/1) ... [2020-09-25 03:09:55,242 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:09:55" (1/1) ... [2020-09-25 03:09:55,246 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:09:55" (1/1) ... [2020-09-25 03:09:55,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:09:55" (1/1) ... [2020-09-25 03:09:55,254 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:09:55" (1/1) ... [2020-09-25 03:09:55,256 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 03:09:55,257 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 03:09:55,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 03:09:55,257 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 03:09:55,258 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:09:55" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 03:09:55,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 03:09:55,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 03:09:55,337 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-09-25 03:09:55,337 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-09-25 03:09:55,338 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 03:09:55,338 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 03:09:55,338 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 03:09:55,338 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-09-25 03:09:55,338 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-09-25 03:09:55,338 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 03:09:55,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 03:09:55,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 03:09:55,594 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 03:09:55,594 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 03:09:55,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 03:09:55 BoogieIcfgContainer [2020-09-25 03:09:55,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 03:09:55,612 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 03:09:55,612 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 03:09:55,616 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 03:09:55,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 03:09:54" (1/3) ... [2020-09-25 03:09:55,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c558968 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 03:09:55, skipping insertion in model container [2020-09-25 03:09:55,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:09:55" (2/3) ... [2020-09-25 03:09:55,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c558968 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 03:09:55, skipping insertion in model container [2020-09-25 03:09:55,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 03:09:55" (3/3) ... [2020-09-25 03:09:55,637 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-1.c [2020-09-25 03:09:55,655 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 03:09:55,667 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 03:09:55,687 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 03:09:55,716 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 03:09:55,716 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 03:09:55,717 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 03:09:55,717 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 03:09:55,717 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 03:09:55,717 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 03:09:55,717 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 03:09:55,717 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 03:09:55,738 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-09-25 03:09:55,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-25 03:09:55,745 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:09:55,746 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:09:55,746 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:09:55,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:09:55,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1089710179, now seen corresponding path program 1 times [2020-09-25 03:09:55,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:09:55,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188413134] [2020-09-25 03:09:55,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:09:55,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:09:55,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:09:55,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:09:56,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:09:56,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 03:09:56,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 03:09:56,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-09-25 03:09:56,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:09:56,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 03:09:56,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 03:09:56,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 03:09:56,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 03:09:56,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:09:56,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:09:56,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:09:56,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:09:56,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:09:56,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:09:56,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 03:09:56,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:09:56,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:09:56,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:09:56,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:09:56,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:09:56,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 03:09:56,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:09:56,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:09:56,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:09:56,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:09:56,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:09:56,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 03:09:56,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:09:56,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 03:09:56,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:09:56,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 03:09:56,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:09:56,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:09:56,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188413134] [2020-09-25 03:09:56,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 03:09:56,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 03:09:56,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616142704] [2020-09-25 03:09:56,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 03:09:56,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:09:56,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 03:09:56,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 03:09:56,261 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 5 states. [2020-09-25 03:09:56,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:09:56,351 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2020-09-25 03:09:56,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 03:09:56,353 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-25 03:09:56,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:09:56,368 INFO L225 Difference]: With dead ends: 58 [2020-09-25 03:09:56,368 INFO L226 Difference]: Without dead ends: 42 [2020-09-25 03:09:56,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 03:09:56,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-25 03:09:56,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-25 03:09:56,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 03:09:56,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-09-25 03:09:56,437 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 16 [2020-09-25 03:09:56,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:09:56,438 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-09-25 03:09:56,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 03:09:56,438 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-09-25 03:09:56,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-25 03:09:56,441 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:09:56,441 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:09:56,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 03:09:56,442 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:09:56,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:09:56,442 INFO L82 PathProgramCache]: Analyzing trace with hash -653728005, now seen corresponding path program 1 times [2020-09-25 03:09:56,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:09:56,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179348032] [2020-09-25 03:09:56,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:09:56,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:09:56,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:09:56,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:09:56,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 03:09:56,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:09:56,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-09-25 03:09:56,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:09:56,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 03:09:56,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 03:09:56,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 03:09:56,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:09:56,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:09:56,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:09:56,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:09:56,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:09:56,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:09:56,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:09:56,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 03:09:56,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:09:56,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:09:56,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:09:56,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:09:56,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:09:56,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 03:09:56,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:09:56,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:09:56,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:09:56,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 03:09:56,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:09:56,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-25 03:09:56,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:09:56,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 03:09:56,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 03:09:56,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 03:09:56,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:09:56,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:09:56,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179348032] [2020-09-25 03:09:56,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 03:09:56,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 03:09:56,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704939183] [2020-09-25 03:09:56,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 03:09:56,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:09:56,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 03:09:56,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 03:09:56,665 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 5 states. [2020-09-25 03:09:56,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:09:56,763 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-09-25 03:09:56,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 03:09:56,764 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-09-25 03:09:56,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:09:56,766 INFO L225 Difference]: With dead ends: 50 [2020-09-25 03:09:56,766 INFO L226 Difference]: Without dead ends: 44 [2020-09-25 03:09:56,767 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 [2020-09-25 03:09:56,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-25 03:09:56,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-09-25 03:09:56,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 03:09:56,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-09-25 03:09:56,777 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 17 [2020-09-25 03:09:56,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:09:56,777 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-09-25 03:09:56,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 03:09:56,778 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-09-25 03:09:56,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 03:09:56,780 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:09:56,780 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:09:56,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 03:09:56,780 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:09:56,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:09:56,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1617834856, now seen corresponding path program 1 times [2020-09-25 03:09:56,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:09:56,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796864110] [2020-09-25 03:09:56,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:09:56,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:09:56,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:09:56,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:09:56,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:09:57,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:09:57,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-25 03:09:57,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 03:09:57,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 780 [2020-09-25 03:09:57,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:09:57,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 03:09:57,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 03:09:57,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 03:09:57,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:09:57,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:09:57,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:09:57,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:09:57,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:09:57,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:09:57,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:09:57,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:09:57,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:09:57,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:09:57,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:09:57,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:09:57,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:09:57,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 03:09:57,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:09:57,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:09:57,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:09:57,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:09:57,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-25 03:09:57,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 03:09:57,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 315 [2020-09-25 03:09:57,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:09:57,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 03:09:57,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:09:57,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-25 03:09:57,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:09:58,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 03:09:58,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:09:58,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:09:58,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:09:58,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:09:58,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:09:58,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 03:09:58,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:09:58,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 03:09:58,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:09:58,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 03:09:58,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:09:58,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 03:09:58,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:09:58,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:09:58,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:09:58,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:09:58,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:09:58,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-25 03:09:58,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:09:58,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 03:09:58,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:09:58,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 03:09:58,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:09:58,088 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-25 03:09:58,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796864110] [2020-09-25 03:09:58,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 03:09:58,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-25 03:09:58,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572392972] [2020-09-25 03:09:58,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 03:09:58,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:09:58,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 03:09:58,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-25 03:09:58,097 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 8 states. [2020-09-25 03:09:58,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:09:58,249 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2020-09-25 03:09:58,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 03:09:58,252 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-09-25 03:09:58,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:09:58,257 INFO L225 Difference]: With dead ends: 63 [2020-09-25 03:09:58,257 INFO L226 Difference]: Without dead ends: 57 [2020-09-25 03:09:58,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-25 03:09:58,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-25 03:09:58,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2020-09-25 03:09:58,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-25 03:09:58,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-09-25 03:09:58,281 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 33 [2020-09-25 03:09:58,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:09:58,281 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-09-25 03:09:58,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 03:09:58,282 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-09-25 03:09:58,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 03:09:58,286 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:09:58,287 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:09:58,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 03:09:58,287 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:09:58,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:09:58,288 INFO L82 PathProgramCache]: Analyzing trace with hash -159162515, now seen corresponding path program 1 times [2020-09-25 03:09:58,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:09:58,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500567197] [2020-09-25 03:09:58,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:09:58,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:09:58,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:09:58,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:09:58,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:09:58,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:09:58,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:09:58,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:09:59,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:09:59,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 03:09:59,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 03:09:59,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1583 [2020-09-25 03:09:59,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:09:59,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 03:09:59,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 03:09:59,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 03:09:59,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:09:59,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:09:59,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:09:59,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:09:59,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:09:59,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:09:59,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:09:59,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:09:59,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:09:59,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:09:59,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:09:59,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:09:59,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:09:59,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 03:09:59,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:09:59,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:09:59,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:09:59,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:10:00,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:10:00,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:10:00,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:10:00,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 03:10:00,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 03:10:00,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 327 [2020-09-25 03:10:00,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:10:00,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 03:10:00,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 03:10:00,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-25 03:10:00,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:10:00,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 03:10:00,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:10:00,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:10:00,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:10:00,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:10:00,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:10:00,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 03:10:00,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:10:00,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 03:10:00,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:10:00,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 03:10:00,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:10:00,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 03:10:00,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:10:00,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:10:00,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:10:00,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:10:00,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 03:10:00,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 03:10:00,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-25 03:10:00,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:10:00,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 03:10:00,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:10:00,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 03:10:00,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:10:00,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 03:10:00,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500567197] [2020-09-25 03:10:00,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 03:10:00,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 03:10:00,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776971824] [2020-09-25 03:10:00,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 03:10:00,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:10:00,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 03:10:00,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 03:10:00,350 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 7 states. [2020-09-25 03:10:00,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:10:00,491 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2020-09-25 03:10:00,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 03:10:00,492 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-09-25 03:10:00,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:10:00,494 INFO L225 Difference]: With dead ends: 62 [2020-09-25 03:10:00,494 INFO L226 Difference]: Without dead ends: 56 [2020-09-25 03:10:00,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-25 03:10:00,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-25 03:10:00,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2020-09-25 03:10:00,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-25 03:10:00,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-09-25 03:10:00,506 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 34 [2020-09-25 03:10:00,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:10:00,506 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-09-25 03:10:00,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 03:10:00,506 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-09-25 03:10:00,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 03:10:00,508 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:10:00,508 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:10:00,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 03:10:00,509 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:10:00,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:10:00,509 INFO L82 PathProgramCache]: Analyzing trace with hash 887160861, now seen corresponding path program 2 times [2020-09-25 03:10:00,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:10:00,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381713815] [2020-09-25 03:10:00,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:10:00,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 03:10:00,519 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 03:10:00,519 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 03:10:00,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 03:10:00,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 03:10:00 BoogieIcfgContainer [2020-09-25 03:10:00,547 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 03:10:00,551 INFO L168 Benchmark]: Toolchain (without parser) took 5719.93 ms. Allocated memory was 147.8 MB in the beginning and 243.8 MB in the end (delta: 95.9 MB). Free memory was 103.8 MB in the beginning and 144.9 MB in the end (delta: -41.0 MB). Peak memory consumption was 54.9 MB. Max. memory is 7.1 GB. [2020-09-25 03:10:00,552 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 147.8 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 03:10:00,553 INFO L168 Benchmark]: CACSL2BoogieTranslator took 304.05 ms. Allocated memory is still 147.8 MB. Free memory was 103.1 MB in the beginning and 93.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-25 03:10:00,554 INFO L168 Benchmark]: Boogie Preprocessor took 116.29 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 93.6 MB in the beginning and 183.2 MB in the end (delta: -89.6 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-09-25 03:10:00,555 INFO L168 Benchmark]: RCFGBuilder took 344.40 ms. Allocated memory is still 204.5 MB. Free memory was 183.2 MB in the beginning and 168.8 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-09-25 03:10:00,556 INFO L168 Benchmark]: TraceAbstraction took 4935.65 ms. Allocated memory was 204.5 MB in the beginning and 243.8 MB in the end (delta: 39.3 MB). Free memory was 168.2 MB in the beginning and 144.9 MB in the end (delta: 23.3 MB). Peak memory consumption was 62.7 MB. Max. memory is 7.1 GB. [2020-09-25 03:10:00,560 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 147.8 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 304.05 ms. Allocated memory is still 147.8 MB. Free memory was 103.1 MB in the beginning and 93.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.29 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 93.6 MB in the beginning and 183.2 MB in the end (delta: -89.6 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 344.40 ms. Allocated memory is still 204.5 MB. Free memory was 183.2 MB in the beginning and 168.8 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4935.65 ms. Allocated memory was 204.5 MB in the beginning and 243.8 MB in the end (delta: 39.3 MB). Free memory was 168.2 MB in the beginning and 144.9 MB in the end (delta: 23.3 MB). Peak memory consumption was 62.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 2; [L37] CALL, EXPR fibo1(x) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND TRUE n == 1 [L21] return 1; [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND TRUE n < 1 [L19] return 0; [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) [L37] int result = fibo1(x); [L38] COND TRUE result == 1 [L39] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 45 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.8s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 169 SDtfs, 57 SDslu, 609 SDs, 0 SdLazy, 191 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred 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, 4 MinimizatonAttempts, 15 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 3.8s InterpolantComputationTime, 134 NumberOfCodeBlocks, 134 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 96 ConstructedInterpolants, 0 QuantifiedInterpolants, 6964 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 9/9 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...