/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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 05:26:43,204 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 05:26:43,208 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 05:26:43,254 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 05:26:43,254 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 05:26:43,255 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 05:26:43,257 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 05:26:43,259 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 05:26:43,261 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 05:26:43,262 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 05:26:43,263 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 05:26:43,265 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 05:26:43,265 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 05:26:43,266 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 05:26:43,267 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 05:26:43,269 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 05:26:43,270 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 05:26:43,271 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 05:26:43,273 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 05:26:43,275 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 05:26:43,277 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 05:26:43,278 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 05:26:43,280 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 05:26:43,281 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 05:26:43,284 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 05:26:43,284 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 05:26:43,284 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 05:26:43,285 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 05:26:43,286 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 05:26:43,287 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 05:26:43,287 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 05:26:43,288 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 05:26:43,289 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 05:26:43,290 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 05:26:43,291 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 05:26:43,292 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 05:26:43,292 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 05:26:43,293 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 05:26:43,293 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 05:26:43,294 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 05:26:43,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 05:26:43,296 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 05:26:43,322 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 05:26:43,322 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 05:26:43,324 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 05:26:43,324 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 05:26:43,324 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 05:26:43,324 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 05:26:43,325 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 05:26:43,325 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 05:26:43,325 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 05:26:43,325 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 05:26:43,325 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 05:26:43,326 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 05:26:43,326 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 05:26:43,326 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 05:26:43,326 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 05:26:43,326 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 05:26:43,327 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 05:26:43,327 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 05:26:43,327 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 05:26:43,327 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 05:26:43,327 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 05:26:43,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 05:26:43,328 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 05:26:43,328 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 05:26:43,328 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 05:26:43,330 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 05:26:43,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 05:26:43,330 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 05:26:43,330 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 05:26:43,331 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; [2020-09-25 05:26:43,811 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 05:26:43,830 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 05:26:43,838 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 05:26:43,840 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 05:26:43,842 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 05:26:43,843 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-1.c [2020-09-25 05:26:43,935 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4d45f2077/d43c477160f741719635b7cf833a9e8b/FLAGd7e0b85d8 [2020-09-25 05:26:44,512 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 05:26:44,513 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_2-1.c [2020-09-25 05:26:44,520 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4d45f2077/d43c477160f741719635b7cf833a9e8b/FLAGd7e0b85d8 [2020-09-25 05:26:44,872 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4d45f2077/d43c477160f741719635b7cf833a9e8b [2020-09-25 05:26:44,885 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 05:26:44,892 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 05:26:44,893 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 05:26:44,893 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 05:26:44,898 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 05:26:44,899 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:26:44" (1/1) ... [2020-09-25 05:26:44,904 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@548345a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:26:44, skipping insertion in model container [2020-09-25 05:26:44,904 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:26:44" (1/1) ... [2020-09-25 05:26:44,914 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 05:26:44,942 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 05:26:45,169 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:26:45,175 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 05:26:45,196 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:26:45,213 INFO L208 MainTranslator]: Completed translation [2020-09-25 05:26:45,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:26:45 WrapperNode [2020-09-25 05:26:45,213 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 05:26:45,214 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 05:26:45,215 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 05:26:45,215 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 05:26:45,229 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:26:45" (1/1) ... [2020-09-25 05:26:45,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:26:45" (1/1) ... [2020-09-25 05:26:45,236 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:26:45" (1/1) ... [2020-09-25 05:26:45,236 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:26:45" (1/1) ... [2020-09-25 05:26:45,321 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:26:45" (1/1) ... [2020-09-25 05:26:45,324 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:26:45" (1/1) ... [2020-09-25 05:26:45,325 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:26:45" (1/1) ... [2020-09-25 05:26:45,327 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 05:26:45,328 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 05:26:45,328 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 05:26:45,328 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 05:26:45,329 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:26:45" (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 05:26:45,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 05:26:45,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 05:26:45,413 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-09-25 05:26:45,413 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-09-25 05:26:45,413 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 05:26:45,414 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 05:26:45,414 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 05:26:45,414 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-09-25 05:26:45,414 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-09-25 05:26:45,414 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 05:26:45,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 05:26:45,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 05:26:45,667 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 05:26:45,667 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 05:26:45,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:26:45 BoogieIcfgContainer [2020-09-25 05:26:45,674 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 05:26:45,675 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 05:26:45,675 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 05:26:45,679 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 05:26:45,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 05:26:44" (1/3) ... [2020-09-25 05:26:45,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16e25f80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:26:45, skipping insertion in model container [2020-09-25 05:26:45,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:26:45" (2/3) ... [2020-09-25 05:26:45,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16e25f80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:26:45, skipping insertion in model container [2020-09-25 05:26:45,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:26:45" (3/3) ... [2020-09-25 05:26:45,684 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-1.c [2020-09-25 05:26:45,697 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 05:26:45,709 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 05:26:45,763 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 05:26:45,812 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 05:26:45,812 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 05:26:45,812 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 05:26:45,812 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 05:26:45,812 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 05:26:45,813 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 05:26:45,813 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 05:26:45,813 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 05:26:45,835 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-09-25 05:26:45,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-25 05:26:45,843 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:26:45,844 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:26:45,845 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:26:45,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:26:45,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1089710179, now seen corresponding path program 1 times [2020-09-25 05:26:45,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:26:45,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962099656] [2020-09-25 05:26:45,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:26:45,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:26:45,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:26:46,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:26:46,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:26:46,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 05:26:46,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:26:46,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 242 [2020-09-25 05:26:46,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:26:46,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:26:46,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 05:26:46,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 05:26:46,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 05:26:46,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 05:26:46,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:26:46,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:26:46,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:26:46,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:26:46,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:26:46,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:26:46,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 05:26:46,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:26:46,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:26:46,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:26:46,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:26:46,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:26:46,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:26:46,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 05:26:46,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:26:46,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:26:46,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:26:46,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 05:26:46,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:26:46,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 05:26:46,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:26:46,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:26:46,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 05:26:46,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:26:46,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 05:26:46,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:26:46,364 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 05:26:46,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962099656] [2020-09-25 05:26:46,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:26:46,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 05:26:46,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106810351] [2020-09-25 05:26:46,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 05:26:46,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:26:46,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 05:26:46,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 05:26:46,401 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 5 states. [2020-09-25 05:26:46,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:26:46,498 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2020-09-25 05:26:46,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 05:26:46,500 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-25 05:26:46,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:26:46,517 INFO L225 Difference]: With dead ends: 58 [2020-09-25 05:26:46,517 INFO L226 Difference]: Without dead ends: 42 [2020-09-25 05:26:46,522 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 05:26:46,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-25 05:26:46,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-25 05:26:46,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 05:26:46,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-09-25 05:26:46,589 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 16 [2020-09-25 05:26:46,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:26:46,590 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-09-25 05:26:46,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 05:26:46,590 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-09-25 05:26:46,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-25 05:26:46,593 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:26:46,593 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 05:26:46,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 05:26:46,594 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:26:46,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:26:46,594 INFO L82 PathProgramCache]: Analyzing trace with hash -653728005, now seen corresponding path program 1 times [2020-09-25 05:26:46,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:26:46,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227826869] [2020-09-25 05:26:46,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:26:46,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:26:46,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:26:46,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:26:46,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 05:26:46,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:26:46,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-09-25 05:26:46,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:26:46,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:26:46,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 05:26:46,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 05:26:46,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 05:26:46,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:26:46,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:26:46,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:26:46,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:26:46,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:26:46,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:26:46,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:26:46,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 05:26:46,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:26:46,729 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:26:46,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:26:46,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:26:46,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:26:46,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:26:46,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 05:26:46,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:26:46,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:26:46,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:26:46,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 05:26:46,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:26:46,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-25 05:26:46,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:26:46,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:26:46,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 05:26:46,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 05:26:46,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 05:26:46,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:26:46,786 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 05:26:46,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227826869] [2020-09-25 05:26:46,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:26:46,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 05:26:46,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495147669] [2020-09-25 05:26:46,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 05:26:46,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:26:46,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 05:26:46,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 05:26:46,790 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 5 states. [2020-09-25 05:26:46,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:26:46,883 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-09-25 05:26:46,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 05:26:46,885 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-09-25 05:26:46,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:26:46,887 INFO L225 Difference]: With dead ends: 50 [2020-09-25 05:26:46,887 INFO L226 Difference]: Without dead ends: 44 [2020-09-25 05:26:46,888 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 05:26:46,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-25 05:26:46,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-09-25 05:26:46,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 05:26:46,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-09-25 05:26:46,902 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 17 [2020-09-25 05:26:46,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:26:46,903 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-09-25 05:26:46,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 05:26:46,903 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-09-25 05:26:46,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 05:26:46,905 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:26:46,906 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 05:26:46,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 05:26:46,906 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:26:46,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:26:46,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1617834856, now seen corresponding path program 1 times [2020-09-25 05:26:46,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:26:46,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884396139] [2020-09-25 05:26:46,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:26:46,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:26:46,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:26:47,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:26:47,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:26:47,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:26:47,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-25 05:26:47,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 05:26:47,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 867 [2020-09-25 05:26:47,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:26:47,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:26:47,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 05:26:47,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 05:26:47,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 05:26:47,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:26:47,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:26:47,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:26:47,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:26:47,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:26:47,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:26:47,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:26:47,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 05:26:47,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:26:47,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:26:47,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:26:47,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:26:47,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:26:47,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:26:47,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 05:26:47,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:26:47,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:26:47,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:26:47,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:26:47,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-25 05:26:47,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:26:47,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-09-25 05:26:47,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:26:47,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:26:47,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 05:26:47,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 05:26:47,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 05:26:47,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:26:47,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 05:26:47,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:26:47,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:26:47,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:26:47,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 05:26:47,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:26:47,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 05:26:47,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:26:47,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:26:47,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 05:26:47,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:26:47,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 05:26:47,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:26:48,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 05:26:48,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:26:48,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:26:48,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:26:48,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 05:26:48,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:26:48,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 05:26:48,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:26:48,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:26:48,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:26:48,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:26:48,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 05:26:48,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:26:48,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 05:26:48,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884396139] [2020-09-25 05:26:48,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:26:48,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 05:26:48,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771999045] [2020-09-25 05:26:48,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 05:26:48,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:26:48,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 05:26:48,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 05:26:48,049 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 7 states. [2020-09-25 05:26:48,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:26:48,218 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2020-09-25 05:26:48,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 05:26:48,220 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-09-25 05:26:48,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:26:48,224 INFO L225 Difference]: With dead ends: 58 [2020-09-25 05:26:48,224 INFO L226 Difference]: Without dead ends: 52 [2020-09-25 05:26:48,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 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 05:26:48,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-25 05:26:48,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-09-25 05:26:48,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-25 05:26:48,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-09-25 05:26:48,238 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 33 [2020-09-25 05:26:48,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:26:48,239 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-09-25 05:26:48,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 05:26:48,239 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-09-25 05:26:48,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 05:26:48,241 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:26:48,241 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 05:26:48,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 05:26:48,242 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:26:48,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:26:48,242 INFO L82 PathProgramCache]: Analyzing trace with hash 887160861, now seen corresponding path program 1 times [2020-09-25 05:26:48,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:26:48,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748132656] [2020-09-25 05:26:48,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:26:48,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 05:26:48,257 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 05:26:48,257 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 05:26:48,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 05:26:48,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 05:26:48 BoogieIcfgContainer [2020-09-25 05:26:48,295 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 05:26:48,299 INFO L168 Benchmark]: Toolchain (without parser) took 3410.46 ms. Allocated memory was 140.0 MB in the beginning and 234.9 MB in the end (delta: 94.9 MB). Free memory was 103.8 MB in the beginning and 126.2 MB in the end (delta: -22.4 MB). Peak memory consumption was 72.5 MB. Max. memory is 7.1 GB. [2020-09-25 05:26:48,300 INFO L168 Benchmark]: CDTParser took 0.63 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 05:26:48,301 INFO L168 Benchmark]: CACSL2BoogieTranslator took 320.89 ms. Allocated memory is still 140.0 MB. Free memory was 103.1 MB in the beginning and 93.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-09-25 05:26:48,302 INFO L168 Benchmark]: Boogie Preprocessor took 112.94 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 93.5 MB in the beginning and 181.5 MB in the end (delta: -88.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-09-25 05:26:48,303 INFO L168 Benchmark]: RCFGBuilder took 346.14 ms. Allocated memory is still 202.4 MB. Free memory was 181.5 MB in the beginning and 166.8 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. [2020-09-25 05:26:48,304 INFO L168 Benchmark]: TraceAbstraction took 2620.03 ms. Allocated memory was 202.4 MB in the beginning and 234.9 MB in the end (delta: 32.5 MB). Free memory was 166.8 MB in the beginning and 126.2 MB in the end (delta: 40.6 MB). Peak memory consumption was 73.1 MB. Max. memory is 7.1 GB. [2020-09-25 05:26:48,308 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.63 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 320.89 ms. Allocated memory is still 140.0 MB. Free memory was 103.1 MB in the beginning and 93.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.94 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 93.5 MB in the beginning and 181.5 MB in the end (delta: -88.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 346.14 ms. Allocated memory is still 202.4 MB. Free memory was 181.5 MB in the beginning and 166.8 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2620.03 ms. Allocated memory was 202.4 MB in the beginning and 234.9 MB in the end (delta: 32.5 MB). Free memory was 166.8 MB in the beginning and 126.2 MB in the end (delta: 40.6 MB). Peak memory consumption was 73.1 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: 2.4s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 121 SDtfs, 56 SDslu, 354 SDs, 0 SdLazy, 132 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s 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, 3 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 100 NumberOfCodeBlocks, 100 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 63 ConstructedInterpolants, 0 QuantifiedInterpolants, 2961 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 1/5 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...