/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_b2_o3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 13:04:24,947 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 13:04:24,950 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 13:04:24,989 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 13:04:24,989 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 13:04:24,996 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 13:04:24,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 13:04:25,001 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 13:04:25,004 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 13:04:25,006 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 13:04:25,007 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 13:04:25,008 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 13:04:25,008 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 13:04:25,011 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 13:04:25,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 13:04:25,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 13:04:25,016 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 13:04:25,016 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 13:04:25,018 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 13:04:25,025 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 13:04:25,027 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 13:04:25,028 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 13:04:25,029 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 13:04:25,029 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 13:04:25,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 13:04:25,046 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 13:04:25,046 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 13:04:25,047 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 13:04:25,048 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 13:04:25,049 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 13:04:25,049 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 13:04:25,049 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 13:04:25,050 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 13:04:25,051 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 13:04:25,051 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 13:04:25,052 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 13:04:25,052 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 13:04:25,052 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 13:04:25,053 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 13:04:25,053 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 13:04:25,054 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 13:04:25,055 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 13:04:25,075 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 13:04:25,076 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 13:04:25,077 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 13:04:25,077 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 13:04:25,077 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 13:04:25,077 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 13:04:25,077 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 13:04:25,078 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 13:04:25,078 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 13:04:25,078 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 13:04:25,078 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 13:04:25,078 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 13:04:25,078 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 13:04:25,079 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 13:04:25,079 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 13:04:25,079 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 13:04:25,079 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 13:04:25,079 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 13:04:25,080 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 13:04:25,080 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 13:04:25,080 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 13:04:25,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 13:04:25,080 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 13:04:25,081 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 13:04:25,081 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 13:04:25,081 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 13:04:25,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 13:04:25,081 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 13:04:25,082 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 13:04:25,082 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 13:04:25,370 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 13:04:25,385 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 13:04:25,390 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 13:04:25,392 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 13:04:25,393 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 13:04:25,393 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b2_o3.c [2020-10-13 13:04:25,462 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a07b89165/a66e014414d942edb49eda34f8f9ee9e/FLAG7c065323f [2020-10-13 13:04:25,876 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 13:04:25,876 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_b2_o3.c [2020-10-13 13:04:25,883 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a07b89165/a66e014414d942edb49eda34f8f9ee9e/FLAG7c065323f [2020-10-13 13:04:26,233 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a07b89165/a66e014414d942edb49eda34f8f9ee9e [2020-10-13 13:04:26,243 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 13:04:26,245 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 13:04:26,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 13:04:26,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 13:04:26,250 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 13:04:26,251 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:04:26" (1/1) ... [2020-10-13 13:04:26,254 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75e6ef35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:04:26, skipping insertion in model container [2020-10-13 13:04:26,254 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:04:26" (1/1) ... [2020-10-13 13:04:26,261 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 13:04:26,279 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 13:04:26,432 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 13:04:26,436 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 13:04:26,451 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 13:04:26,464 INFO L208 MainTranslator]: Completed translation [2020-10-13 13:04:26,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:04:26 WrapperNode [2020-10-13 13:04:26,464 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 13:04:26,465 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 13:04:26,465 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 13:04:26,465 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 13:04:26,477 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:04:26" (1/1) ... [2020-10-13 13:04:26,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:04:26" (1/1) ... [2020-10-13 13:04:26,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:04:26" (1/1) ... [2020-10-13 13:04:26,481 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:04:26" (1/1) ... [2020-10-13 13:04:26,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:04:26" (1/1) ... [2020-10-13 13:04:26,558 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:04:26" (1/1) ... [2020-10-13 13:04:26,559 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:04:26" (1/1) ... [2020-10-13 13:04:26,560 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 13:04:26,561 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 13:04:26,561 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 13:04:26,561 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 13:04:26,562 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:04:26" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 13:04:26,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 13:04:26,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 13:04:26,621 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-13 13:04:26,622 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 13:04:26,622 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-13 13:04:26,622 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 13:04:26,622 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-13 13:04:26,623 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 13:04:26,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 13:04:26,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 13:04:26,781 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 13:04:26,781 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 13:04:26,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:04:26 BoogieIcfgContainer [2020-10-13 13:04:26,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 13:04:26,786 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 13:04:26,786 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 13:04:26,789 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 13:04:26,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 01:04:26" (1/3) ... [2020-10-13 13:04:26,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19c82063 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:04:26, skipping insertion in model container [2020-10-13 13:04:26,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:04:26" (2/3) ... [2020-10-13 13:04:26,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19c82063 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:04:26, skipping insertion in model container [2020-10-13 13:04:26,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:04:26" (3/3) ... [2020-10-13 13:04:26,793 INFO L109 eAbstractionObserver]: Analyzing ICFG id_b2_o3.c [2020-10-13 13:04:26,803 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 13:04:26,810 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 13:04:26,822 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 13:04:26,844 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 13:04:26,844 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 13:04:26,845 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 13:04:26,845 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 13:04:26,845 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 13:04:26,845 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 13:04:26,845 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 13:04:26,845 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 13:04:26,859 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-10-13 13:04:26,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 13:04:26,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:04:26,866 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:04:26,866 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:04:26,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:04:26,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1250208381, now seen corresponding path program 1 times [2020-10-13 13:04:26,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:04:26,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906610921] [2020-10-13 13:04:26,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:04:26,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:04:27,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:04:27,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:04:27,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 13:04:27,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:04:27,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-13 13:04:27,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:04:27,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 13:04:27,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 13:04:27,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 13:04:27,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 13:04:27,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:04:27,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:04:27,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:04:27,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:04:27,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 13:04:27,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:04:27,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 13:04:27,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:04:27,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:04:27,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:04:27,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:04:27,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:04:27,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-13 13:04:27,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:04:27,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:04:27,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:04:27,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 13:04:27,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:04:27,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-13 13:04:27,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:04:27,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:04:27,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:04:27,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 13:04:27,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:04:27,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:04:27,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906610921] [2020-10-13 13:04:27,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:04:27,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:04:27,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341979984] [2020-10-13 13:04:27,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:04:27,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:04:27,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:04:27,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:04:27,302 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2020-10-13 13:04:27,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:04:27,354 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-10-13 13:04:27,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:04:27,356 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-13 13:04:27,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:04:27,369 INFO L225 Difference]: With dead ends: 33 [2020-10-13 13:04:27,370 INFO L226 Difference]: Without dead ends: 19 [2020-10-13 13:04:27,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:04:27,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-13 13:04:27,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-13 13:04:27,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-13 13:04:27,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-13 13:04:27,420 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2020-10-13 13:04:27,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:04:27,421 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-13 13:04:27,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:04:27,422 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-13 13:04:27,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 13:04:27,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:04:27,424 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:04:27,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 13:04:27,425 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:04:27,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:04:27,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1951994857, now seen corresponding path program 1 times [2020-10-13 13:04:27,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:04:27,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377348243] [2020-10-13 13:04:27,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:04:27,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:04:27,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:04:27,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:04:27,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:04:27,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 13:04:27,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:04:27,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 347 [2020-10-13 13:04:27,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:04:27,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 13:04:27,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 13:04:27,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 13:04:27,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:04:27,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:04:27,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:04:27,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:04:27,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:04:27,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 13:04:27,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:04:27,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 13:04:27,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:04:27,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:04:27,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:04:27,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:04:27,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:04:27,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-13 13:04:27,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:04:27,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:04:27,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:04:28,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:04:28,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 13:04:28,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:04:28,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-13 13:04:28,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:04:28,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 13:04:28,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-10-13 13:04:28,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 13:04:28,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:04:28,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 13:04:28,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:04:28,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:04:28,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:04:28,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 13:04:28,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:04:28,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-13 13:04:28,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:04:28,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:04:28,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:04:28,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 13:04:28,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 13:04:28,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 13:04:28,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377348243] [2020-10-13 13:04:28,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:04:28,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 13:04:28,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876384617] [2020-10-13 13:04:28,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 13:04:28,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:04:28,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 13:04:28,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 13:04:28,201 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 7 states. [2020-10-13 13:04:28,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:04:28,236 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-10-13 13:04:28,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:04:28,237 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-13 13:04:28,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:04:28,238 INFO L225 Difference]: With dead ends: 31 [2020-10-13 13:04:28,238 INFO L226 Difference]: Without dead ends: 23 [2020-10-13 13:04:28,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 13:04:28,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-13 13:04:28,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-10-13 13:04:28,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 13:04:28,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-13 13:04:28,247 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 20 [2020-10-13 13:04:28,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:04:28,247 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-13 13:04:28,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 13:04:28,248 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-13 13:04:28,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 13:04:28,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:04:28,249 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:04:28,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 13:04:28,249 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:04:28,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:04:28,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1923365706, now seen corresponding path program 1 times [2020-10-13 13:04:28,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:04:28,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835736730] [2020-10-13 13:04:28,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:04:28,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:04:28,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:04:28,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:04:28,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 13:04:28,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:04:28,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-13 13:04:28,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:04:28,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 13:04:28,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 13:04:28,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 13:04:28,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:04:28,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:04:28,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:04:28,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:04:28,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:04:28,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 13:04:28,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:04:28,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:04:28,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:04:28,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:04:28,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:04:28,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:04:28,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:04:28,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-13 13:04:28,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:04:28,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:04:28,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:04:28,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 13:04:28,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:04:28,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-13 13:04:28,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:04:28,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:04:28,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:04:28,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 13:04:28,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:04:28,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 13:04:28,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:04:28,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:04:28,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:04:28,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 13:04:28,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:04:28,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 13:04:28,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:04:28,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:04:28,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:04:28,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:04:28,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:04:28,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 13:04:28,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835736730] [2020-10-13 13:04:28,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:04:28,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:04:28,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150604469] [2020-10-13 13:04:28,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:04:28,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:04:28,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:04:28,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:04:28,392 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-10-13 13:04:28,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:04:28,406 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-10-13 13:04:28,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:04:28,407 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-13 13:04:28,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:04:28,408 INFO L225 Difference]: With dead ends: 21 [2020-10-13 13:04:28,408 INFO L226 Difference]: Without dead ends: 0 [2020-10-13 13:04:28,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:04:28,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-13 13:04:28,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-13 13:04:28,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-13 13:04:28,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-13 13:04:28,410 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2020-10-13 13:04:28,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:04:28,410 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-13 13:04:28,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:04:28,411 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-13 13:04:28,411 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-13 13:04:28,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 13:04:28,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-13 13:04:28,434 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-10-13 13:04:28,434 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-13 13:04:28,435 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-13 13:04:28,435 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-13 13:04:28,435 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-13 13:04:28,435 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-13 13:04:28,435 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2020-10-13 13:04:28,435 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 17) the Hoare annotation is: true [2020-10-13 13:04:28,436 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 17) no Hoare annotation was computed. [2020-10-13 13:04:28,436 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-10-13 13:04:28,436 INFO L268 CegarLoopResult]: For program point L14(lines 14 16) no Hoare annotation was computed. [2020-10-13 13:04:28,436 INFO L271 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: true [2020-10-13 13:04:28,436 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-10-13 13:04:28,436 INFO L268 CegarLoopResult]: For program point L14-2(lines 11 17) no Hoare annotation was computed. [2020-10-13 13:04:28,436 INFO L268 CegarLoopResult]: For program point idFINAL(lines 4 9) no Hoare annotation was computed. [2020-10-13 13:04:28,437 INFO L268 CegarLoopResult]: For program point idEXIT(lines 4 9) no Hoare annotation was computed. [2020-10-13 13:04:28,437 INFO L271 CegarLoopResult]: At program point idENTRY(lines 4 9) the Hoare annotation is: true [2020-10-13 13:04:28,437 INFO L268 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-10-13 13:04:28,437 INFO L271 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: true [2020-10-13 13:04:28,437 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-10-13 13:04:28,437 INFO L268 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2020-10-13 13:04:28,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 01:04:28 BoogieIcfgContainer [2020-10-13 13:04:28,443 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-13 13:04:28,446 INFO L168 Benchmark]: Toolchain (without parser) took 2200.37 ms. Allocated memory was 141.6 MB in the beginning and 233.8 MB in the end (delta: 92.3 MB). Free memory was 104.8 MB in the beginning and 170.2 MB in the end (delta: -65.3 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. [2020-10-13 13:04:28,447 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-13 13:04:28,448 INFO L168 Benchmark]: CACSL2BoogieTranslator took 218.30 ms. Allocated memory is still 141.6 MB. Free memory was 104.6 MB in the beginning and 95.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-10-13 13:04:28,449 INFO L168 Benchmark]: Boogie Preprocessor took 95.36 ms. Allocated memory was 141.6 MB in the beginning and 204.5 MB in the end (delta: 62.9 MB). Free memory was 95.4 MB in the beginning and 183.6 MB in the end (delta: -88.2 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-10-13 13:04:28,450 INFO L168 Benchmark]: RCFGBuilder took 224.31 ms. Allocated memory is still 204.5 MB. Free memory was 183.6 MB in the beginning and 172.1 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. [2020-10-13 13:04:28,451 INFO L168 Benchmark]: TraceAbstraction took 1657.62 ms. Allocated memory was 204.5 MB in the beginning and 233.8 MB in the end (delta: 29.4 MB). Free memory was 171.5 MB in the beginning and 170.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 30.7 MB. Max. memory is 7.1 GB. [2020-10-13 13:04:28,454 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 218.30 ms. Allocated memory is still 141.6 MB. Free memory was 104.6 MB in the beginning and 95.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 95.36 ms. Allocated memory was 141.6 MB in the beginning and 204.5 MB in the end (delta: 62.9 MB). Free memory was 95.4 MB in the beginning and 183.6 MB in the end (delta: -88.2 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 224.31 ms. Allocated memory is still 204.5 MB. Free memory was 183.6 MB in the beginning and 172.1 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1657.62 ms. Allocated memory was 204.5 MB in the beginning and 233.8 MB in the end (delta: 29.4 MB). Free memory was 171.5 MB in the beginning and 170.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 30.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 15]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.5s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 56 SDtfs, 4 SDslu, 188 SDs, 0 SdLazy, 31 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 7 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 53 NumberOfCodeBlocks, 53 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 50 ConstructedInterpolants, 0 QuantifiedInterpolants, 2342 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 8/8 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 correct! Received shutdown request...