/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 --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 interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i5_o5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:21:43,788 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:21:43,792 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:21:43,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:21:43,841 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:21:43,854 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:21:43,856 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:21:43,858 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:21:43,861 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:21:43,864 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:21:43,865 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:21:43,867 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:21:43,868 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:21:43,871 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:21:43,876 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:21:43,877 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:21:43,877 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:21:43,879 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:21:43,880 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:21:43,882 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:21:43,887 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:21:43,888 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:21:43,889 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:21:43,890 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:21:43,895 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:21:43,895 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:21:43,896 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:21:43,902 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:21:43,903 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:21:43,905 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:21:43,905 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:21:43,907 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:21:43,908 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:21:43,909 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:21:43,910 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:21:43,911 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:21:43,911 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:21:43,912 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:21:43,912 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:21:43,918 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:21:43,920 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:21:43,921 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 [2020-09-21 11:21:43,970 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:21:43,970 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:21:43,972 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:21:43,972 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:21:43,973 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:21:43,973 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:21:43,973 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:21:43,974 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:21:43,974 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:21:43,974 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:21:43,975 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:21:43,975 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:21:43,975 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:21:43,976 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:21:43,976 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:21:43,976 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:21:43,977 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:21:43,977 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:21:43,977 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:21:43,977 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:21:43,977 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:21:43,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:21:43,978 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:21:43,978 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:21:43,978 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:21:43,979 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:21:43,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:21:43,979 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:21:43,979 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:21:43,979 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.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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:21:44,468 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:21:44,493 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:21:44,498 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:21:44,500 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:21:44,501 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:21:44,502 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i5_o5-2.c [2020-09-21 11:21:44,603 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c3e81bd5c/85e6c15e766c48108673bba60175bd23/FLAGeae6c29eb [2020-09-21 11:21:45,180 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:21:45,181 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_i5_o5-2.c [2020-09-21 11:21:45,190 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c3e81bd5c/85e6c15e766c48108673bba60175bd23/FLAGeae6c29eb [2020-09-21 11:21:45,546 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c3e81bd5c/85e6c15e766c48108673bba60175bd23 [2020-09-21 11:21:45,559 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:21:45,565 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:21:45,567 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:21:45,567 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:21:45,572 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:21:45,573 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:21:45" (1/1) ... [2020-09-21 11:21:45,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@782f63b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:45, skipping insertion in model container [2020-09-21 11:21:45,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:21:45" (1/1) ... [2020-09-21 11:21:45,590 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:21:45,618 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:21:45,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:21:45,837 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:21:45,857 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:21:45,875 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:21:45,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:45 WrapperNode [2020-09-21 11:21:45,876 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:21:45,877 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:21:45,877 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:21:45,877 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:21:45,895 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:45" (1/1) ... [2020-09-21 11:21:45,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:45" (1/1) ... [2020-09-21 11:21:45,902 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:45" (1/1) ... [2020-09-21 11:21:45,902 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:45" (1/1) ... [2020-09-21 11:21:45,906 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:45" (1/1) ... [2020-09-21 11:21:45,909 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:45" (1/1) ... [2020-09-21 11:21:45,910 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:45" (1/1) ... [2020-09-21 11:21:45,912 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:21:45,912 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:21:45,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:21:45,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:21:45,914 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:45" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:21:46,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:21:46,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:21:46,075 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-09-21 11:21:46,075 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:21:46,075 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 11:21:46,075 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:21:46,075 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-09-21 11:21:46,076 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:21:46,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:21:46,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:21:46,267 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:21:46,267 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 11:21:46,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:21:46 BoogieIcfgContainer [2020-09-21 11:21:46,272 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:21:46,273 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:21:46,273 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:21:46,277 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:21:46,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:21:45" (1/3) ... [2020-09-21 11:21:46,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f1513db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:21:46, skipping insertion in model container [2020-09-21 11:21:46,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:45" (2/3) ... [2020-09-21 11:21:46,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f1513db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:21:46, skipping insertion in model container [2020-09-21 11:21:46,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:21:46" (3/3) ... [2020-09-21 11:21:46,282 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i5_o5-2.c [2020-09-21 11:21:46,293 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:21:46,303 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:21:46,326 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:21:46,356 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:21:46,356 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:21:46,356 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:21:46,357 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:21:46,357 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:21:46,357 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:21:46,357 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:21:46,357 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:21:46,377 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-09-21 11:21:46,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-21 11:21:46,384 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:21:46,385 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:21:46,385 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:21:46,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:21:46,392 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-09-21 11:21:46,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:21:46,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635185387] [2020-09-21 11:21:46,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:21:46,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:46,552 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:46,552 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:46,553 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:46,553 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:46,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-21 11:21:46,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:46,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-21 11:21:46,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:46,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:21:46,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:21:46,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:21:46,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:46,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:21:46,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:46,621 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:46,622 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:46,630 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:46,630 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:46,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:21:46,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:46,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 11:21:46,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:46,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:21:46,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:46,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:21:46,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-21 11:21:46,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:21:46,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:46,693 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:46,693 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:46,694 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:46,694 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:46,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:21:46,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:46,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-21 11:21:46,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:46,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:21:46,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:21:46,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:21:46,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 11:21:46,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:21:46,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635185387] [2020-09-21 11:21:46,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:21:46,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 11:21:46,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640429204] [2020-09-21 11:21:46,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:21:46,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:21:46,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:21:46,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:21:46,782 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-09-21 11:21:46,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:21:46,876 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-09-21 11:21:46,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:21:46,879 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-21 11:21:46,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:21:46,893 INFO L225 Difference]: With dead ends: 30 [2020-09-21 11:21:46,893 INFO L226 Difference]: Without dead ends: 18 [2020-09-21 11:21:46,898 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 [2020-09-21 11:21:46,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-09-21 11:21:46,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-09-21 11:21:46,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-21 11:21:46,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-09-21 11:21:46,952 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-09-21 11:21:46,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:21:46,952 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-09-21 11:21:46,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:21:46,953 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-09-21 11:21:46,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-21 11:21:46,955 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:21:46,955 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:21:46,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:21:46,956 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:21:46,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:21:46,957 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-09-21 11:21:46,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:21:46,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447543008] [2020-09-21 11:21:46,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:21:46,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:47,014 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:47,014 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:47,015 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:47,015 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:47,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-21 11:21:47,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:47,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-09-21 11:21:47,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:47,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:21:47,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:21:47,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 11:21:47,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:47,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:21:47,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:47,065 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:47,066 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:47,066 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:47,066 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:47,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:21:47,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:47,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:21:47,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:47,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:21:47,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:47,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:21:47,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:47,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:21:47,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:47,115 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:47,116 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:47,116 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:47,116 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:47,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 11:21:47,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:47,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-21 11:21:47,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:47,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:21:47,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:21:47,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 11:21:47,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:47,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:47,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:47,207 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:47,208 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:47,208 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:47,209 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:47,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:21:47,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:47,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-21 11:21:47,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:47,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:21:47,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:47,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:21:47,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:47,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 11:21:47,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447543008] [2020-09-21 11:21:47,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:21:47,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 11:21:47,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761778132] [2020-09-21 11:21:47,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 11:21:47,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:21:47,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 11:21:47,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:21:47,269 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-09-21 11:21:47,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:21:47,345 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-09-21 11:21:47,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:21:47,346 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-09-21 11:21:47,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:21:47,347 INFO L225 Difference]: With dead ends: 25 [2020-09-21 11:21:47,347 INFO L226 Difference]: Without dead ends: 21 [2020-09-21 11:21:47,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:21:47,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-21 11:21:47,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-21 11:21:47,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-21 11:21:47,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-09-21 11:21:47,356 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-09-21 11:21:47,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:21:47,356 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-09-21 11:21:47,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 11:21:47,356 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-09-21 11:21:47,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 11:21:47,357 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:21:47,358 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:21:47,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:21:47,358 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:21:47,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:21:47,359 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-09-21 11:21:47,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:21:47,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052943009] [2020-09-21 11:21:47,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:21:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:47,393 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:47,394 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:47,394 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:47,394 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:47,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-21 11:21:47,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:47,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-21 11:21:47,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:47,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:21:47,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:21:47,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 11:21:47,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:47,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:21:47,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:47,417 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:47,418 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:47,418 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:47,418 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:47,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:21:47,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:47,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:21:47,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:47,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:21:47,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:47,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:21:47,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:47,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:21:47,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:47,468 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:47,468 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:47,468 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:47,469 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:47,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 11:21:47,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:47,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-21 11:21:47,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:47,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:21:47,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:21:47,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-21 11:21:47,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:47,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:47,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:47,522 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:47,522 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:47,523 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:47,523 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:47,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 11:21:47,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:47,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-21 11:21:47,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:47,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:21:47,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:47,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 11:21:47,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:47,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:47,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:47,572 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:47,573 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:47,573 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:47,574 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:47,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:21:47,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:47,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-21 11:21:47,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:47,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:21:47,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:47,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:21:47,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:47,594 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-21 11:21:47,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052943009] [2020-09-21 11:21:47,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:21:47,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 11:21:47,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833335094] [2020-09-21 11:21:47,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 11:21:47,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:21:47,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 11:21:47,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:21:47,597 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2020-09-21 11:21:47,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:21:47,688 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-09-21 11:21:47,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 11:21:47,688 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-09-21 11:21:47,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:21:47,690 INFO L225 Difference]: With dead ends: 28 [2020-09-21 11:21:47,690 INFO L226 Difference]: Without dead ends: 24 [2020-09-21 11:21:47,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:21:47,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-21 11:21:47,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-09-21 11:21:47,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-21 11:21:47,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-09-21 11:21:47,698 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-09-21 11:21:47,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:21:47,698 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-09-21 11:21:47,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 11:21:47,699 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-09-21 11:21:47,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-21 11:21:47,700 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:21:47,700 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:21:47,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:21:47,701 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:21:47,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:21:47,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-09-21 11:21:47,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:21:47,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25032904] [2020-09-21 11:21:47,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:21:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:47,736 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:47,737 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:47,737 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:47,737 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:47,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-21 11:21:47,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:47,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-21 11:21:47,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:47,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 11:21:47,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:21:47,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-21 11:21:47,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:47,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:21:47,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:47,759 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:47,760 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:47,760 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:47,760 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:47,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:21:47,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:47,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:21:47,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:47,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:21:47,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:47,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:21:47,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:47,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:21:47,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:47,824 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:47,825 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:47,825 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:47,825 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:47,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 11:21:47,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:47,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-09-21 11:21:47,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:47,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 11:21:47,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:21:47,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-21 11:21:47,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:47,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:47,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:47,908 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:47,909 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:47,909 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:47,909 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:47,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 11:21:47,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:47,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-21 11:21:47,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:47,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 11:21:47,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:47,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-21 11:21:47,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:47,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:47,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:47,960 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:47,961 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:47,961 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:47,961 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:47,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 11:21:47,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:47,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-21 11:21:47,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:47,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:21:47,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:47,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 11:21:47,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-21 11:21:47,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:47,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:48,012 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:48,012 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:48,013 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:48,013 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:48,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:21:48,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:48,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-21 11:21:48,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:48,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:21:48,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:48,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:21:48,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:48,033 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-09-21 11:21:48,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25032904] [2020-09-21 11:21:48,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:21:48,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 11:21:48,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716574079] [2020-09-21 11:21:48,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 11:21:48,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:21:48,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 11:21:48,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:21:48,036 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-09-21 11:21:48,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:21:48,114 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-09-21 11:21:48,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 11:21:48,115 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-09-21 11:21:48,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:21:48,116 INFO L225 Difference]: With dead ends: 31 [2020-09-21 11:21:48,116 INFO L226 Difference]: Without dead ends: 27 [2020-09-21 11:21:48,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-09-21 11:21:48,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-09-21 11:21:48,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-09-21 11:21:48,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-21 11:21:48,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-09-21 11:21:48,124 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-09-21 11:21:48,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:21:48,125 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-09-21 11:21:48,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 11:21:48,125 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-09-21 11:21:48,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-21 11:21:48,127 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:21:48,127 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:21:48,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:21:48,127 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:21:48,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:21:48,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-09-21 11:21:48,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:21:48,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867496670] [2020-09-21 11:21:48,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:21:48,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:48,168 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:48,168 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:48,168 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:48,168 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:48,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-21 11:21:48,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:48,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-21 11:21:48,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:48,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-21 11:21:48,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:21:48,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-21 11:21:48,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:48,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:21:48,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:48,192 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:48,192 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:48,193 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:48,193 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:48,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:21:48,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:48,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:21:48,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:48,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:21:48,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:48,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:21:48,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:48,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:21:48,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:48,229 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:48,230 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:48,230 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:48,230 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:48,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-21 11:21:48,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:48,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-21 11:21:48,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:48,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-21 11:21:48,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:21:48,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-21 11:21:48,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:48,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:48,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:48,282 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:48,283 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:48,283 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:48,283 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:48,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 11:21:48,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:48,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-21 11:21:48,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:48,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-21 11:21:48,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:48,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-21 11:21:48,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:48,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:48,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:48,321 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:48,322 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:48,322 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:48,322 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:48,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 11:21:48,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:48,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-21 11:21:48,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:48,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 11:21:48,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:48,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-21 11:21:48,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:48,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:48,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:48,365 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:48,366 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:48,366 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:48,366 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:48,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 11:21:48,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:48,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 11:21:48,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:48,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:21:48,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:48,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 11:21:48,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:48,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:48,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:48,409 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:48,410 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:48,410 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:48,410 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:48,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:21:48,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:48,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 11:21:48,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:48,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:21:48,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:48,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:21:48,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:48,449 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-09-21 11:21:48,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867496670] [2020-09-21 11:21:48,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:21:48,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 11:21:48,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918438754] [2020-09-21 11:21:48,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 11:21:48,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:21:48,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 11:21:48,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:21:48,452 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2020-09-21 11:21:48,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:21:48,551 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-09-21 11:21:48,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 11:21:48,552 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-09-21 11:21:48,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:21:48,554 INFO L225 Difference]: With dead ends: 34 [2020-09-21 11:21:48,554 INFO L226 Difference]: Without dead ends: 30 [2020-09-21 11:21:48,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-09-21 11:21:48,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-21 11:21:48,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-09-21 11:21:48,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-21 11:21:48,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-09-21 11:21:48,562 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-09-21 11:21:48,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:21:48,563 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-09-21 11:21:48,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 11:21:48,563 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-09-21 11:21:48,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-21 11:21:48,565 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:21:48,565 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:21:48,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:21:48,566 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:21:48,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:21:48,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-09-21 11:21:48,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:21:48,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042556357] [2020-09-21 11:21:48,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:21:48,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:48,628 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:48,629 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:48,629 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:48,629 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:48,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-09-21 11:21:48,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:48,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-09-21 11:21:48,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:48,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-21 11:21:48,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-09-21 11:21:48,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-21 11:21:48,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:48,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:21:48,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:48,677 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:48,677 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:48,678 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:48,678 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:48,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:21:48,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:48,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:21:48,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:48,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:21:48,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:48,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:21:48,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:48,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:21:48,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:48,745 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:48,746 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:48,746 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:48,746 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:48,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-21 11:21:48,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:48,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-21 11:21:48,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:48,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-21 11:21:48,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:48,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-09-21 11:21:48,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:48,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:48,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:48,818 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:48,818 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:48,818 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:48,819 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:48,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-21 11:21:48,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:48,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-21 11:21:48,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:48,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-21 11:21:48,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:48,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-21 11:21:48,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:48,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:48,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:48,880 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:48,880 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:48,880 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:48,881 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:48,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 11:21:48,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:48,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-21 11:21:48,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:48,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 11:21:48,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:48,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-21 11:21:48,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:48,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:48,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:48,940 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:48,940 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:48,941 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:48,941 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:48,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 11:21:48,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:48,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-21 11:21:48,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:48,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:21:48,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:48,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-21 11:21:48,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:48,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:48,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:49,003 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:49,003 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:49,003 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:49,004 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:49,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 11:21:49,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:49,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 11:21:49,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:49,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:21:49,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:49,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-21 11:21:49,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:49,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:49,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:49,064 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:49,065 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:49,065 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:49,065 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:49,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:21:49,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:49,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:21:49,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:49,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:21:49,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:49,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:21:49,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:49,102 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-09-21 11:21:49,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042556357] [2020-09-21 11:21:49,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:21:49,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-21 11:21:49,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745153353] [2020-09-21 11:21:49,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-21 11:21:49,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:21:49,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-21 11:21:49,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-09-21 11:21:49,105 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2020-09-21 11:21:49,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:21:49,209 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-09-21 11:21:49,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 11:21:49,209 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-09-21 11:21:49,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:21:49,210 INFO L225 Difference]: With dead ends: 37 [2020-09-21 11:21:49,211 INFO L226 Difference]: Without dead ends: 33 [2020-09-21 11:21:49,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-09-21 11:21:49,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-21 11:21:49,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-09-21 11:21:49,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-21 11:21:49,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-09-21 11:21:49,218 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-09-21 11:21:49,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:21:49,219 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-09-21 11:21:49,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-21 11:21:49,219 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-09-21 11:21:49,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-21 11:21:49,221 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:21:49,221 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:21:49,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 11:21:49,221 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:21:49,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:21:49,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-09-21 11:21:49,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:21:49,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033683899] [2020-09-21 11:21:49,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:21:49,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:49,266 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:49,266 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:49,267 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:49,267 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:49,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-21 11:21:49,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:49,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-21 11:21:49,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:49,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-21 11:21:49,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:21:49,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-21 11:21:49,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:49,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:21:49,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:49,289 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:49,289 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:49,289 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:49,289 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:49,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:21:49,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:49,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:21:49,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:49,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:21:49,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:49,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:21:49,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:49,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:21:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:49,343 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:49,344 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:49,344 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:49,344 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:49,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-21 11:21:49,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:49,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-21 11:21:49,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:49,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-21 11:21:49,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:21:49,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-21 11:21:49,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:49,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:49,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:49,416 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:49,416 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:49,416 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:49,417 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:49,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-21 11:21:49,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:49,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-21 11:21:49,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:49,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-21 11:21:49,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:49,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-09-21 11:21:49,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:49,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:49,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:49,469 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:49,470 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:49,470 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:49,470 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:49,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-21 11:21:49,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:49,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-21 11:21:49,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:49,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-21 11:21:49,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:49,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-21 11:21:49,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:49,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:49,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:49,520 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:49,520 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:49,521 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:49,521 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:49,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 11:21:49,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:49,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-21 11:21:49,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:49,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-21 11:21:49,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:49,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-21 11:21:49,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:49,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:49,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:49,556 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:49,557 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:49,557 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:49,557 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:49,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 11:21:49,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:49,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-21 11:21:49,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:49,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 11:21:49,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:49,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-21 11:21:49,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:49,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:49,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:49,586 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:49,586 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:49,586 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:49,587 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:49,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 11:21:49,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:49,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 11:21:49,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:49,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:21:49,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:49,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 11:21:49,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:49,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:49,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:49,611 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:49,611 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:49,612 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:49,626 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:49,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:21:49,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:49,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-21 11:21:49,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:49,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:21:49,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:49,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:21:49,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:49,650 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 51 proven. 24 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-09-21 11:21:49,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033683899] [2020-09-21 11:21:49,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:21:49,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 11:21:49,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505407475] [2020-09-21 11:21:49,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 11:21:49,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:21:49,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 11:21:49,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-21 11:21:49,654 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 12 states. [2020-09-21 11:21:49,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:21:49,932 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2020-09-21 11:21:49,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 11:21:49,933 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-09-21 11:21:49,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:21:49,933 INFO L225 Difference]: With dead ends: 62 [2020-09-21 11:21:49,934 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 11:21:49,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-21 11:21:49,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 11:21:49,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 11:21:49,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 11:21:49,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 11:21:49,936 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 49 [2020-09-21 11:21:49,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:21:49,937 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 11:21:49,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 11:21:49,937 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 11:21:49,937 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 11:21:49,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 11:21:49,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 11:21:50,085 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-21 11:21:50,086 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 11:21:50,086 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 11:21:50,086 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 11:21:50,086 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 11:21:50,086 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 11:21:50,088 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-09-21 11:21:50,088 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2020-09-21 11:21:50,088 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2020-09-21 11:21:50,088 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-09-21 11:21:50,088 INFO L268 CegarLoopResult]: For program point L12(lines 12 14) no Hoare annotation was computed. [2020-09-21 11:21:50,089 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (= 5 main_~input~0) [2020-09-21 11:21:50,089 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-09-21 11:21:50,089 INFO L268 CegarLoopResult]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2020-09-21 11:21:50,089 INFO L268 CegarLoopResult]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2020-09-21 11:21:50,089 INFO L268 CegarLoopResult]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2020-09-21 11:21:50,089 INFO L271 CegarLoopResult]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2020-09-21 11:21:50,090 INFO L264 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (and (<= id_~x |id_#in~x|) (<= |id_#in~x| id_~x)) [2020-09-21 11:21:50,090 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-09-21 11:21:50,090 INFO L268 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2020-09-21 11:21:50,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:21:50 BoogieIcfgContainer [2020-09-21 11:21:50,108 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:21:50,122 INFO L168 Benchmark]: Toolchain (without parser) took 4559.97 ms. Allocated memory was 139.5 MB in the beginning and 249.0 MB in the end (delta: 109.6 MB). Free memory was 102.4 MB in the beginning and 165.9 MB in the end (delta: -63.5 MB). Peak memory consumption was 46.1 MB. Max. memory is 7.1 GB. [2020-09-21 11:21:50,123 INFO L168 Benchmark]: CDTParser took 0.96 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-21 11:21:50,127 INFO L168 Benchmark]: CACSL2BoogieTranslator took 309.79 ms. Allocated memory is still 139.5 MB. Free memory was 101.7 MB in the beginning and 92.6 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-09-21 11:21:50,128 INFO L168 Benchmark]: Boogie Preprocessor took 35.00 ms. Allocated memory is still 139.5 MB. Free memory was 92.6 MB in the beginning and 91.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-09-21 11:21:50,129 INFO L168 Benchmark]: RCFGBuilder took 359.76 ms. Allocated memory was 139.5 MB in the beginning and 201.3 MB in the end (delta: 61.9 MB). Free memory was 91.3 MB in the beginning and 169.4 MB in the end (delta: -78.2 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-09-21 11:21:50,133 INFO L168 Benchmark]: TraceAbstraction took 3835.07 ms. Allocated memory was 201.3 MB in the beginning and 249.0 MB in the end (delta: 47.7 MB). Free memory was 168.8 MB in the beginning and 165.9 MB in the end (delta: 2.9 MB). Peak memory consumption was 50.6 MB. Max. memory is 7.1 GB. [2020-09-21 11:21:50,141 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.96 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 309.79 ms. Allocated memory is still 139.5 MB. Free memory was 101.7 MB in the beginning and 92.6 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 35.00 ms. Allocated memory is still 139.5 MB. Free memory was 92.6 MB in the beginning and 91.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 359.76 ms. Allocated memory was 139.5 MB in the beginning and 201.3 MB in the end (delta: 61.9 MB). Free memory was 91.3 MB in the beginning and 169.4 MB in the end (delta: -78.2 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3835.07 ms. Allocated memory was 201.3 MB in the beginning and 249.0 MB in the end (delta: 47.7 MB). Free memory was 168.8 MB in the beginning and 165.9 MB in the end (delta: 2.9 MB). Peak memory consumption was 50.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: 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, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.5s, OverallIterations: 7, TraceHistogramMax: 7, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 114 SDtfs, 91 SDslu, 563 SDs, 0 SdLazy, 390 SolverSat, 38 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 147 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=6, 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, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 19 PreInvPairs, 19 NumberOfFragments, 15 HoareAnnotationTreeSize, 19 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 100 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 217 NumberOfCodeBlocks, 217 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 210 ConstructedInterpolants, 0 QuantifiedInterpolants, 20220 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 172/294 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...