/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=BIGGEST --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/Ackermann02.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 20:22:48,336 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 20:22:48,341 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 20:22:48,392 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 20:22:48,393 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 20:22:48,404 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 20:22:48,407 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 20:22:48,412 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 20:22:48,415 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 20:22:48,419 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 20:22:48,420 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 20:22:48,421 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 20:22:48,421 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 20:22:48,425 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 20:22:48,428 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 20:22:48,430 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 20:22:48,431 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 20:22:48,433 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 20:22:48,434 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 20:22:48,444 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 20:22:48,447 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 20:22:48,448 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 20:22:48,449 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 20:22:48,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 20:22:48,454 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 20:22:48,454 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 20:22:48,454 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 20:22:48,458 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 20:22:48,458 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 20:22:48,459 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 20:22:48,460 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 20:22:48,461 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 20:22:48,461 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 20:22:48,462 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 20:22:48,464 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 20:22:48,464 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 20:22:48,465 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 20:22:48,465 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 20:22:48,465 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 20:22:48,467 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 20:22:48,468 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 20:22:48,469 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 [2020-09-24 20:22:48,521 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 20:22:48,522 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 20:22:48,524 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 20:22:48,524 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 20:22:48,524 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 20:22:48,525 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 20:22:48,525 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 20:22:48,525 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 20:22:48,526 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 20:22:48,526 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 20:22:48,527 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 20:22:48,527 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 20:22:48,527 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 20:22:48,528 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 20:22:48,528 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 20:22:48,528 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 20:22:48,529 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 20:22:48,529 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 20:22:48,529 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 20:22:48,529 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 20:22:48,529 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 20:22:48,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:22:48,530 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 20:22:48,530 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 20:22:48,530 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 20:22:48,531 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 20:22:48,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 20:22:48,531 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 20:22:48,531 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 20:22:48,531 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true; [2020-09-24 20:22:48,994 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 20:22:49,013 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 20:22:49,018 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 20:22:49,020 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 20:22:49,020 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 20:22:49,021 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann02.c [2020-09-24 20:22:49,121 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d756537da/3dfc2931d2dc4994b20f8463ed1311b4/FLAGae26920e0 [2020-09-24 20:22:49,659 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 20:22:49,659 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/Ackermann02.c [2020-09-24 20:22:49,668 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d756537da/3dfc2931d2dc4994b20f8463ed1311b4/FLAGae26920e0 [2020-09-24 20:22:50,017 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d756537da/3dfc2931d2dc4994b20f8463ed1311b4 [2020-09-24 20:22:50,030 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 20:22:50,035 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 20:22:50,036 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 20:22:50,037 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 20:22:50,041 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 20:22:50,043 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:22:50" (1/1) ... [2020-09-24 20:22:50,047 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f78b0b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:22:50, skipping insertion in model container [2020-09-24 20:22:50,048 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:22:50" (1/1) ... [2020-09-24 20:22:50,057 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 20:22:50,083 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 20:22:50,321 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:22:50,326 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 20:22:50,349 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:22:50,368 INFO L208 MainTranslator]: Completed translation [2020-09-24 20:22:50,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:22:50 WrapperNode [2020-09-24 20:22:50,369 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 20:22:50,370 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 20:22:50,370 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 20:22:50,370 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 20:22:50,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:22:50" (1/1) ... [2020-09-24 20:22:50,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:22:50" (1/1) ... [2020-09-24 20:22:50,395 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:22:50" (1/1) ... [2020-09-24 20:22:50,396 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:22:50" (1/1) ... [2020-09-24 20:22:50,401 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:22:50" (1/1) ... [2020-09-24 20:22:50,404 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:22:50" (1/1) ... [2020-09-24 20:22:50,405 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:22:50" (1/1) ... [2020-09-24 20:22:50,407 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 20:22:50,408 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 20:22:50,408 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 20:22:50,408 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 20:22:50,409 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:22:50" (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 [2020-09-24 20:22:50,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 20:22:50,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 20:22:50,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-09-24 20:22:50,602 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 20:22:50,602 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 20:22:50,602 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 20:22:50,603 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-09-24 20:22:50,603 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 20:22:50,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 20:22:50,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 20:22:50,875 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 20:22:50,876 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 20:22:50,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:22:50 BoogieIcfgContainer [2020-09-24 20:22:50,882 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 20:22:50,883 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 20:22:50,883 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 20:22:50,888 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 20:22:50,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 08:22:50" (1/3) ... [2020-09-24 20:22:50,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22afe02d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:22:50, skipping insertion in model container [2020-09-24 20:22:50,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:22:50" (2/3) ... [2020-09-24 20:22:50,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22afe02d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:22:50, skipping insertion in model container [2020-09-24 20:22:50,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:22:50" (3/3) ... [2020-09-24 20:22:50,893 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann02.c [2020-09-24 20:22:50,907 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 20:22:50,918 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 20:22:50,946 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 20:22:50,992 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 20:22:50,992 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 20:22:50,993 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 20:22:50,993 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 20:22:50,993 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 20:22:50,993 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 20:22:50,994 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 20:22:50,994 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 20:22:51,027 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-24 20:22:51,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-24 20:22:51,040 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:22:51,041 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:22:51,042 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:22:51,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:22:51,051 INFO L82 PathProgramCache]: Analyzing trace with hash -852610024, now seen corresponding path program 1 times [2020-09-24 20:22:51,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:22:51,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998683872] [2020-09-24 20:22:51,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:22:51,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:51,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:51,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:51,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 20:22:51,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:51,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 230 [2020-09-24 20:22:51,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:51,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:22:51,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 20:22:51,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 20:22:51,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-09-24 20:22:51,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:22:51,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:51,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:51,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:51,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:22:51,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:51,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 20:22:51,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:51,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:22:51,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:51,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:22:51,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:22:51,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 20:22:51,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:51,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:51,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:51,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 20:22:51,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:51,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-09-24 20:22:51,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:51,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:22:51,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:51,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 20:22:51,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:22:51,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:22:51,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998683872] [2020-09-24 20:22:51,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:22:51,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 20:22:51,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576772501] [2020-09-24 20:22:51,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 20:22:51,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:22:51,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 20:22:51,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 20:22:51,802 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 5 states. [2020-09-24 20:22:51,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:22:51,974 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2020-09-24 20:22:51,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 20:22:51,977 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-09-24 20:22:51,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:22:51,993 INFO L225 Difference]: With dead ends: 88 [2020-09-24 20:22:51,993 INFO L226 Difference]: Without dead ends: 45 [2020-09-24 20:22:51,999 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 [2020-09-24 20:22:52,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-24 20:22:52,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-09-24 20:22:52,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-24 20:22:52,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2020-09-24 20:22:52,065 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 24 [2020-09-24 20:22:52,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:22:52,066 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2020-09-24 20:22:52,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 20:22:52,066 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2020-09-24 20:22:52,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-24 20:22:52,070 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:22:52,070 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2020-09-24 20:22:52,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 20:22:52,071 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:22:52,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:22:52,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1574290279, now seen corresponding path program 1 times [2020-09-24 20:22:52,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:22:52,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102647818] [2020-09-24 20:22:52,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:22:52,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:52,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:52,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:52,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-24 20:22:52,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:52,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-09-24 20:22:52,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:52,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 20:22:52,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 20:22:52,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-24 20:22:52,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:22:52,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:22:52,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:52,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:52,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:52,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:22:52,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:52,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 20:22:52,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:52,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:22:52,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:52,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:22:52,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:22:52,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 20:22:52,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:52,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:52,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:52,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-24 20:22:52,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:52,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-09-24 20:22:52,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:52,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 20:22:52,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:52,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-24 20:22:52,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:22:52,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 20:22:52,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:52,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:52,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:52,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 20:22:52,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:52,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-24 20:22:52,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:52,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 20:22:52,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:52,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 20:22:52,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:22:52,570 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 20:22:52,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102647818] [2020-09-24 20:22:52,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:22:52,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 20:22:52,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241021323] [2020-09-24 20:22:52,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 20:22:52,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:22:52,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 20:22:52,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 20:22:52,575 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 7 states. [2020-09-24 20:22:52,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:22:52,782 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2020-09-24 20:22:52,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 20:22:52,783 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-09-24 20:22:52,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:22:52,787 INFO L225 Difference]: With dead ends: 68 [2020-09-24 20:22:52,788 INFO L226 Difference]: Without dead ends: 62 [2020-09-24 20:22:52,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-24 20:22:52,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-24 20:22:52,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-09-24 20:22:52,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-24 20:22:52,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2020-09-24 20:22:52,805 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 34 [2020-09-24 20:22:52,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:22:52,806 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2020-09-24 20:22:52,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 20:22:52,806 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2020-09-24 20:22:52,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-24 20:22:52,809 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:22:52,809 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 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] [2020-09-24 20:22:52,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 20:22:52,810 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:22:52,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:22:52,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1453709960, now seen corresponding path program 2 times [2020-09-24 20:22:52,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:22:52,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137885522] [2020-09-24 20:22:52,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:22:52,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:52,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:52,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:52,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-24 20:22:52,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:52,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-09-24 20:22:52,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:52,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 20:22:52,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-24 20:22:52,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 20:22:52,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:22:52,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:22:52,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:52,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:52,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:52,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:22:52,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:52,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 20:22:52,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:52,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:22:52,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:52,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:22:52,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:22:52,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 20:22:52,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:52,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:52,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:52,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-24 20:22:52,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:52,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-09-24 20:22:52,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:52,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 20:22:52,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-24 20:22:52,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 20:22:52,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:22:52,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 20:22:52,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:52,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:53,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:53,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-24 20:22:53,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:53,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-24 20:22:53,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:53,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 20:22:53,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 20:22:53,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-24 20:22:53,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:22:53,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 20:22:53,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:53,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:53,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:53,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 20:22:53,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:53,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 20:22:53,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:53,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:22:53,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:53,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 20:22:53,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:22:53,077 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-24 20:22:53,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137885522] [2020-09-24 20:22:53,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:22:53,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-09-24 20:22:53,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206808422] [2020-09-24 20:22:53,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 20:22:53,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:22:53,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 20:22:53,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 20:22:53,080 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand 4 states. [2020-09-24 20:22:53,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:22:53,154 INFO L93 Difference]: Finished difference Result 115 states and 174 transitions. [2020-09-24 20:22:53,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 20:22:53,155 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-09-24 20:22:53,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:22:53,158 INFO L225 Difference]: With dead ends: 115 [2020-09-24 20:22:53,158 INFO L226 Difference]: Without dead ends: 66 [2020-09-24 20:22:53,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 20:22:53,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-24 20:22:53,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-09-24 20:22:53,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-24 20:22:53,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 89 transitions. [2020-09-24 20:22:53,178 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 89 transitions. Word has length 44 [2020-09-24 20:22:53,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:22:53,179 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 89 transitions. [2020-09-24 20:22:53,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 20:22:53,179 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 89 transitions. [2020-09-24 20:22:53,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-24 20:22:53,183 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:22:53,183 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2020-09-24 20:22:53,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 20:22:53,184 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:22:53,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:22:53,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1096450289, now seen corresponding path program 1 times [2020-09-24 20:22:53,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:22:53,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014525363] [2020-09-24 20:22:53,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:22:53,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 20:22:53,205 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 20:22:53,205 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 20:22:53,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 20:22:53,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 08:22:53 BoogieIcfgContainer [2020-09-24 20:22:53,239 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 20:22:53,243 INFO L168 Benchmark]: Toolchain (without parser) took 3209.05 ms. Allocated memory was 140.5 MB in the beginning and 235.4 MB in the end (delta: 94.9 MB). Free memory was 103.6 MB in the beginning and 136.3 MB in the end (delta: -32.7 MB). Peak memory consumption was 62.2 MB. Max. memory is 7.1 GB. [2020-09-24 20:22:53,244 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-09-24 20:22:53,245 INFO L168 Benchmark]: CACSL2BoogieTranslator took 332.91 ms. Allocated memory is still 140.5 MB. Free memory was 103.0 MB in the beginning and 93.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-09-24 20:22:53,246 INFO L168 Benchmark]: Boogie Preprocessor took 37.73 ms. Allocated memory is still 140.5 MB. Free memory was 93.6 MB in the beginning and 92.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-09-24 20:22:53,247 INFO L168 Benchmark]: RCFGBuilder took 474.17 ms. Allocated memory was 140.5 MB in the beginning and 205.5 MB in the end (delta: 65.0 MB). Free memory was 92.2 MB in the beginning and 170.3 MB in the end (delta: -78.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-09-24 20:22:53,248 INFO L168 Benchmark]: TraceAbstraction took 2355.50 ms. Allocated memory was 205.5 MB in the beginning and 235.4 MB in the end (delta: 29.9 MB). Free memory was 170.3 MB in the beginning and 136.3 MB in the end (delta: 34.0 MB). Peak memory consumption was 63.9 MB. Max. memory is 7.1 GB. [2020-09-24 20:22:53,252 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 332.91 ms. Allocated memory is still 140.5 MB. Free memory was 103.0 MB in the beginning and 93.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 37.73 ms. Allocated memory is still 140.5 MB. Free memory was 93.6 MB in the beginning and 92.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 474.17 ms. Allocated memory was 140.5 MB in the beginning and 205.5 MB in the end (delta: 65.0 MB). Free memory was 92.2 MB in the beginning and 170.3 MB in the end (delta: -78.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2355.50 ms. Allocated memory was 205.5 MB in the beginning and 235.4 MB in the end (delta: 29.9 MB). Free memory was 170.3 MB in the beginning and 136.3 MB in the end (delta: 34.0 MB). Peak memory consumption was 63.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 43]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L26] int m = __VERIFIER_nondet_int(); [L27] COND FALSE !(m < 0 || m > 3) [L32] int n = __VERIFIER_nondet_int(); [L33] COND FALSE !(n < 0 || n > 23) [L39] CALL, EXPR ackermann(m,n) [L15] COND FALSE !(m==0) [L18] COND TRUE n==0 [L19] CALL, EXPR ackermann(m-1,1) [L15] COND FALSE !(m==0) [L18] COND FALSE !(n==0) [L21] CALL, EXPR ackermann(m,n-1) [L15] COND FALSE !(m==0) [L18] COND TRUE n==0 [L19] CALL, EXPR ackermann(m-1,1) [L15] COND TRUE m==0 [L16] return n+1; [L19] RET, EXPR ackermann(m-1,1) [L19] return ackermann(m-1,1); [L21] RET, EXPR ackermann(m,n-1) [L21] CALL, EXPR ackermann(m-1,ackermann(m,n-1)) [L15] COND TRUE m==0 [L16] return n+1; [L21] RET, EXPR ackermann(m-1,ackermann(m,n-1)) [L21] return ackermann(m-1,ackermann(m,n-1)); [L19] RET, EXPR ackermann(m-1,1) [L19] return ackermann(m-1,1); [L39] RET, EXPR ackermann(m,n) [L39] int result = ackermann(m,n); [L40] COND FALSE !(m < 2 || result >= 4) [L43] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.2s, OverallIterations: 4, TraceHistogramMax: 5, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 128 SDtfs, 102 SDslu, 228 SDs, 0 SdLazy, 125 SolverSat, 48 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 165 NumberOfCodeBlocks, 165 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 99 ConstructedInterpolants, 0 QuantifiedInterpolants, 7077 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 22/25 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...