/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_o5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:21:43,028 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:21:43,032 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:21:43,057 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:21:43,058 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:21:43,059 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:21:43,061 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:21:43,063 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:21:43,064 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:21:43,065 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:21:43,067 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:21:43,068 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:21:43,068 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:21:43,069 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:21:43,070 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:21:43,072 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:21:43,073 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:21:43,074 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:21:43,076 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:21:43,078 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:21:43,080 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:21:43,081 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:21:43,086 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:21:43,087 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:21:43,089 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:21:43,089 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:21:43,092 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:21:43,094 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:21:43,097 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:21:43,099 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:21:43,101 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:21:43,102 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:21:43,103 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:21:43,104 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:21:43,106 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:21:43,106 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:21:43,107 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:21:43,107 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:21:43,107 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:21:43,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:21:43,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:21:43,119 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 11:21:43,171 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:21:43,172 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:21:43,173 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:21:43,173 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:21:43,173 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:21:43,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:21:43,175 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:21:43,175 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:21:43,175 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:21:43,175 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:21:43,176 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:21:43,177 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:21:43,177 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:21:43,177 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:21:43,177 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:21:43,178 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:21:43,178 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:21:43,178 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:21:43,178 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:21:43,178 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:21:43,179 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:21:43,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:21:43,179 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:21:43,179 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:21:43,179 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:21:43,180 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:21:43,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:21:43,180 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:21:43,180 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:21:43,180 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 11:21:43,617 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:21:43,635 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:21:43,639 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:21:43,641 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:21:43,642 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:21:43,643 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i5_o5-1.c [2020-09-21 11:21:43,723 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b38de94a/f35a0e20f9014d85a04bbea279731642/FLAG842012e2a [2020-09-21 11:21:44,289 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:21:44,290 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_i5_o5-1.c [2020-09-21 11:21:44,297 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b38de94a/f35a0e20f9014d85a04bbea279731642/FLAG842012e2a [2020-09-21 11:21:44,610 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b38de94a/f35a0e20f9014d85a04bbea279731642 [2020-09-21 11:21:44,624 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:21:44,629 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:21:44,631 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:21:44,631 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:21:44,636 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:21:44,637 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:21:44" (1/1) ... [2020-09-21 11:21:44,642 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e48a7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:44, skipping insertion in model container [2020-09-21 11:21:44,642 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:21:44" (1/1) ... [2020-09-21 11:21:44,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:21:44,678 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:21:44,912 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:21:44,918 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:21:44,937 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:21:44,956 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:21:44,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:44 WrapperNode [2020-09-21 11:21:44,957 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:21:44,958 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:21:44,958 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:21:44,958 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:21:44,973 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:44" (1/1) ... [2020-09-21 11:21:44,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:44" (1/1) ... [2020-09-21 11:21:44,979 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:44" (1/1) ... [2020-09-21 11:21:44,980 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:44" (1/1) ... [2020-09-21 11:21:44,984 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:44" (1/1) ... [2020-09-21 11:21:44,987 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:44" (1/1) ... [2020-09-21 11:21:44,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:44" (1/1) ... [2020-09-21 11:21:44,990 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:21:44,990 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:21:44,991 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:21:44,991 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:21:44,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:44" (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 11:21:45,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:21:45,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:21:45,150 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-09-21 11:21:45,151 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:21:45,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 11:21:45,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:21:45,151 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-09-21 11:21:45,151 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:21:45,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:21:45,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:21:45,344 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:21:45,345 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 11:21:45,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:21:45 BoogieIcfgContainer [2020-09-21 11:21:45,349 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:21:45,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:21:45,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:21:45,354 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:21:45,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:21:44" (1/3) ... [2020-09-21 11:21:45,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d4a9abd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:21:45, skipping insertion in model container [2020-09-21 11:21:45,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:44" (2/3) ... [2020-09-21 11:21:45,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d4a9abd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:21:45, skipping insertion in model container [2020-09-21 11:21:45,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:21:45" (3/3) ... [2020-09-21 11:21:45,359 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i5_o5-1.c [2020-09-21 11:21:45,370 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:21:45,380 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:21:45,403 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:21:45,436 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:21:45,436 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:21:45,436 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:21:45,437 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:21:45,437 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:21:45,437 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:21:45,437 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:21:45,437 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:21:45,457 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-09-21 11:21:45,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-21 11:21:45,464 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:21:45,466 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:21:45,466 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:21:45,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:21:45,474 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-09-21 11:21:45,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:21:45,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119706284] [2020-09-21 11:21:45,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:21:45,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:45,628 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:45,629 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:45,629 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:45,629 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:45,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-21 11:21:45,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:45,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-21 11:21:45,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:45,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:21:45,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:21:45,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:21:45,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:45,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:21:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:45,756 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:45,757 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:45,757 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:45,758 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:45,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:21:45,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:45,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:21:45,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:45,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:21:45,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:45,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:21:45,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:45,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:21:45,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:45,808 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:45,812 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:45,812 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:45,813 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:45,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:21:45,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:45,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-21 11:21:45,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:45,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:21:45,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:21:45,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:21:45,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:45,883 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 11:21:45,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119706284] [2020-09-21 11:21:45,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:21:45,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 11:21:45,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186145933] [2020-09-21 11:21:45,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:21:45,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:21:45,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:21:45,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:21:45,913 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-09-21 11:21:46,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:21:46,012 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-09-21 11:21:46,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:21:46,015 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-21 11:21:46,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:21:46,029 INFO L225 Difference]: With dead ends: 30 [2020-09-21 11:21:46,029 INFO L226 Difference]: Without dead ends: 18 [2020-09-21 11:21:46,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:21:46,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-09-21 11:21:46,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-09-21 11:21:46,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-21 11:21:46,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-09-21 11:21:46,089 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-09-21 11:21:46,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:21:46,089 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-09-21 11:21:46,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:21:46,090 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-09-21 11:21:46,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-21 11:21:46,092 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:21:46,092 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 11:21:46,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:21:46,093 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:21:46,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:21:46,094 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-09-21 11:21:46,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:21:46,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510562420] [2020-09-21 11:21:46,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:21:46,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:46,136 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:46,136 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:46,136 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:46,137 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:46,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-21 11:21:46,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:46,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-21 11:21:46,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:46,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:21:46,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:21:46,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 11:21:46,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:46,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:21:46,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:46,174 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:46,175 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:46,175 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:46,176 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:46,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:21:46,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:46,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 11:21:46,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:46,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:21:46,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:46,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:21:46,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:46,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:21:46,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:46,208 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:46,209 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:46,209 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:46,209 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:46,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 11:21:46,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:46,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-21 11:21:46,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:46,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:21:46,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:21:46,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 11:21:46,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:46,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:46,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:46,293 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:46,294 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:46,294 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:46,294 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:46,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:21:46,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:46,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-21 11:21:46,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:46,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:21:46,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:46,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:21:46,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:46,355 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 11:21:46,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510562420] [2020-09-21 11:21:46,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:21:46,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 11:21:46,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187585778] [2020-09-21 11:21:46,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 11:21:46,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:21:46,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 11:21:46,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:21:46,364 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-09-21 11:21:46,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:21:46,435 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-09-21 11:21:46,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:21:46,436 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-09-21 11:21:46,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:21:46,437 INFO L225 Difference]: With dead ends: 25 [2020-09-21 11:21:46,437 INFO L226 Difference]: Without dead ends: 21 [2020-09-21 11:21:46,439 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 11:21:46,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-21 11:21:46,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-21 11:21:46,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-21 11:21:46,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-09-21 11:21:46,446 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-09-21 11:21:46,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:21:46,447 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-09-21 11:21:46,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 11:21:46,447 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-09-21 11:21:46,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 11:21:46,449 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:21:46,449 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 11:21:46,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:21:46,449 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:21:46,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:21:46,450 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-09-21 11:21:46,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:21:46,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881362384] [2020-09-21 11:21:46,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:21:46,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:46,518 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:46,519 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:46,519 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:46,519 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:46,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-21 11:21:46,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:46,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-09-21 11:21:46,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:46,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:21:46,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:21:46,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 11:21:46,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 11:21:46,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:21:46,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:46,574 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:46,574 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:46,575 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:46,575 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:46,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:21:46,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:46,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:21:46,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:46,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:21:46,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:46,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:21:46,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:46,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:21:46,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:46,627 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:46,627 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:46,629 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 11:21:46,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 11:21:46,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:46,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-09-21 11:21:46,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:46,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:21:46,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:21:46,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-21 11:21:46,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:46,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:46,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:46,716 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:46,716 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:46,716 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:46,717 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:46,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 11:21:46,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:46,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-21 11:21:46,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:46,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:21:46,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:46,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 11:21:46,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:46,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:46,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:46,763 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:46,763 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:46,764 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:46,764 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:46,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:21:46,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:46,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 11:21:46,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:46,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:21:46,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:46,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:21:46,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:46,799 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 11:21:46,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881362384] [2020-09-21 11:21:46,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:21:46,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 11:21:46,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318535358] [2020-09-21 11:21:46,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 11:21:46,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:21:46,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 11:21:46,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:21:46,806 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2020-09-21 11:21:46,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:21:46,897 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-09-21 11:21:46,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 11:21:46,898 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-09-21 11:21:46,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:21:46,900 INFO L225 Difference]: With dead ends: 28 [2020-09-21 11:21:46,900 INFO L226 Difference]: Without dead ends: 24 [2020-09-21 11:21:46,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:21:46,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-21 11:21:46,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-09-21 11:21:46,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-21 11:21:46,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-09-21 11:21:46,908 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-09-21 11:21:46,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:21:46,909 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-09-21 11:21:46,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 11:21:46,909 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-09-21 11:21:46,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-21 11:21:46,910 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:21:46,911 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 11:21:46,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:21:46,911 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:21:46,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:21:46,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-09-21 11:21:46,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:21:46,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583035606] [2020-09-21 11:21:46,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:21:46,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:46,948 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:46,949 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:46,949 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:46,949 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:46,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-21 11:21:46,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:46,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-21 11:21:46,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:46,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 11:21:46,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:21:46,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-21 11:21:46,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:46,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:21:46,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:47,000 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:47,000 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:47,000 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:47,001 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:47,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:21:47,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:47,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:21:47,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:47,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:21:47,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:47,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:21:47,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:47,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:21:47,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:47,069 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:47,074 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:47,074 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:47,075 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:47,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 11:21:47,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:47,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-21 11:21:47,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:47,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 11:21:47,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:21:47,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-21 11:21:47,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:47,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:47,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:47,145 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:47,145 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:47,146 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:47,146 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:47,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 11:21:47,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:47,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-21 11:21:47,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:47,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 11:21:47,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:47,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-21 11:21:47,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:47,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:47,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:47,209 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:47,209 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:47,209 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:47,210 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:47,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 11:21:47,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:47,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-21 11:21:47,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:47,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:21:47,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:47,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 11:21:47,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-21 11:21:47,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:47,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:47,268 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:47,269 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:47,270 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:47,270 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:47,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:21:47,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:47,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-21 11:21:47,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:47,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:21:47,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:47,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:21:47,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 11:21:47,292 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 11:21:47,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583035606] [2020-09-21 11:21:47,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:21:47,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 11:21:47,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335818902] [2020-09-21 11:21:47,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 11:21:47,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:21:47,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 11:21:47,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:21:47,295 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-09-21 11:21:47,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:21:47,393 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-09-21 11:21:47,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 11:21:47,394 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-09-21 11:21:47,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:21:47,396 INFO L225 Difference]: With dead ends: 31 [2020-09-21 11:21:47,396 INFO L226 Difference]: Without dead ends: 27 [2020-09-21 11:21:47,397 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 11:21:47,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-09-21 11:21:47,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-09-21 11:21:47,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-21 11:21:47,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-09-21 11:21:47,404 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-09-21 11:21:47,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:21:47,404 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-09-21 11:21:47,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 11:21:47,405 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-09-21 11:21:47,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-21 11:21:47,406 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:21:47,406 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 11:21:47,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:21:47,407 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:21:47,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:21:47,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-09-21 11:21:47,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:21:47,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143343818] [2020-09-21 11:21:47,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:21:47,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:47,446 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:47,446 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:47,446 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:47,447 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:47,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-21 11:21:47,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:47,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-21 11:21:47,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:47,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-21 11:21:47,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:21:47,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-21 11:21:47,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:47,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:21:47,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:47,470 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:47,470 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:47,470 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:47,471 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:47,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:21:47,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:47,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:21:47,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:47,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:21:47,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:47,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:21:47,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:47,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:21:47,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:47,507 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:47,507 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:47,508 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:47,508 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:47,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-21 11:21:47,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:47,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-21 11:21:47,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:47,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-21 11:21:47,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:21:47,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-21 11:21:47,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:47,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:47,573 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: 34 [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: 22 [2020-09-21 11:21:47,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:47,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-21 11:21:47,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:47,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-21 11:21:47,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:47,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:47,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:47,616 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:47,617 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:47,617 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:47,617 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:47,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 11:21:47,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:47,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-21 11:21:47,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:47,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 11:21:47,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:47,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-21 11:21:47,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:47,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:47,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:47,659 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:47,660 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:47,660 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:47,660 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:47,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 11:21:47,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:47,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 11:21:47,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:47,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:21:47,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:47,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 11:21:47,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:47,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:47,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:47,709 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:47,709 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:47,710 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:47,710 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:47,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:21:47,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:47,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 11:21:47,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:47,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:21:47,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:47,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:21:47,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:47,750 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 11:21:47,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143343818] [2020-09-21 11:21:47,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:21:47,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 11:21:47,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897009675] [2020-09-21 11:21:47,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 11:21:47,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:21:47,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 11:21:47,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:21:47,753 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2020-09-21 11:21:47,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:21:47,848 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-09-21 11:21:47,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 11:21:47,849 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-09-21 11:21:47,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:21:47,851 INFO L225 Difference]: With dead ends: 34 [2020-09-21 11:21:47,851 INFO L226 Difference]: Without dead ends: 30 [2020-09-21 11:21:47,852 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 11:21:47,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-21 11:21:47,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-09-21 11:21:47,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-21 11:21:47,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-09-21 11:21:47,859 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-09-21 11:21:47,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:21:47,860 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-09-21 11:21:47,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 11:21:47,860 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-09-21 11:21:47,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-21 11:21:47,861 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:21:47,862 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 11:21:47,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:21:47,862 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:21:47,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:21:47,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-09-21 11:21:47,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:21:47,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419529041] [2020-09-21 11:21:47,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:21:47,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 11:21:47,877 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 11:21:47,877 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 11:21:47,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 11:21:47,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:21:47 BoogieIcfgContainer [2020-09-21 11:21:47,908 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:21:47,912 INFO L168 Benchmark]: Toolchain (without parser) took 3284.69 ms. Allocated memory was 140.5 MB in the beginning and 234.9 MB in the end (delta: 94.4 MB). Free memory was 102.5 MB in the beginning and 93.9 MB in the end (delta: 8.6 MB). Peak memory consumption was 102.9 MB. Max. memory is 7.1 GB. [2020-09-21 11:21:47,913 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 11:21:47,913 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.58 ms. Allocated memory is still 140.5 MB. Free memory was 101.8 MB in the beginning and 92.7 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-09-21 11:21:47,914 INFO L168 Benchmark]: Boogie Preprocessor took 32.32 ms. Allocated memory is still 140.5 MB. Free memory was 92.7 MB in the beginning and 91.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-09-21 11:21:47,915 INFO L168 Benchmark]: RCFGBuilder took 358.54 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 91.3 MB in the beginning and 172.1 MB in the end (delta: -80.8 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-09-21 11:21:47,916 INFO L168 Benchmark]: TraceAbstraction took 2557.83 ms. Allocated memory was 203.9 MB in the beginning and 234.9 MB in the end (delta: 30.9 MB). Free memory was 172.1 MB in the beginning and 93.9 MB in the end (delta: 78.2 MB). Peak memory consumption was 109.1 MB. Max. memory is 7.1 GB. [2020-09-21 11:21:47,920 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 326.58 ms. Allocated memory is still 140.5 MB. Free memory was 101.8 MB in the beginning and 92.7 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 32.32 ms. Allocated memory is still 140.5 MB. Free memory was 92.7 MB in the beginning and 91.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 358.54 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 91.3 MB in the beginning and 172.1 MB in the end (delta: -80.8 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2557.83 ms. Allocated memory was 203.9 MB in the beginning and 234.9 MB in the end (delta: 30.9 MB). Free memory was 172.1 MB in the beginning and 93.9 MB in the end (delta: 78.2 MB). Peak memory consumption was 109.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int input = 5; [L11] CALL, EXPR id(input) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND TRUE x==0 [L5] return 0; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) [L11] int result = id(input); [L12] COND TRUE result == 5 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.4s, OverallIterations: 6, TraceHistogramMax: 6, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 69 SDtfs, 73 SDslu, 200 SDs, 0 SdLazy, 116 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 85 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=5, 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, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 168 NumberOfCodeBlocks, 168 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 120 ConstructedInterpolants, 0 QuantifiedInterpolants, 8244 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 42/100 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...