/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/id2_b3_o2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:21:27,329 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:21:27,333 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:21:27,380 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:21:27,381 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:21:27,392 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:21:27,393 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:21:27,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:21:27,401 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:21:27,405 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:21:27,406 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:21:27,407 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:21:27,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:21:27,410 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:21:27,413 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:21:27,415 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:21:27,416 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:21:27,419 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:21:27,421 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:21:27,427 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:21:27,429 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:21:27,430 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:21:27,432 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:21:27,433 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:21:27,437 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:21:27,437 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:21:27,438 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:21:27,441 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:21:27,442 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:21:27,444 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:21:27,444 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:21:27,445 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:21:27,446 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:21:27,446 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:21:27,448 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:21:27,448 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:21:27,449 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:21:27,449 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:21:27,449 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:21:27,450 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:21:27,452 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:21:27,453 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 11:21:27,494 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:21:27,495 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:21:27,496 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:21:27,497 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:21:27,497 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:21:27,497 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:21:27,497 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:21:27,498 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:21:27,498 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:21:27,498 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:21:27,499 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:21:27,499 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:21:27,499 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:21:27,500 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:21:27,500 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:21:27,500 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:21:27,500 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:21:27,501 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:21:27,501 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:21:27,501 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:21:27,501 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:21:27,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:21:27,502 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:21:27,502 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:21:27,502 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:21:27,502 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:21:27,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:21:27,503 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:21:27,503 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:21:27,503 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 11:21:27,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:21:27,953 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:21:27,959 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:21:27,961 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:21:27,962 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:21:27,963 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-09-21 11:21:28,049 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/42bce44b3/4dfb7fff989841b8a11e975afc1b314e/FLAGb2a8fe9cc [2020-09-21 11:21:28,572 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:21:28,573 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-09-21 11:21:28,582 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/42bce44b3/4dfb7fff989841b8a11e975afc1b314e/FLAGb2a8fe9cc [2020-09-21 11:21:28,922 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/42bce44b3/4dfb7fff989841b8a11e975afc1b314e [2020-09-21 11:21:28,935 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:21:28,941 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:21:28,942 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:21:28,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:21:28,947 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:21:28,948 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:21:28" (1/1) ... [2020-09-21 11:21:28,953 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55ef1162 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:28, skipping insertion in model container [2020-09-21 11:21:28,954 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:21:28" (1/1) ... [2020-09-21 11:21:28,963 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:21:28,985 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:21:29,192 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:21:29,197 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:21:29,218 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:21:29,236 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:21:29,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:29 WrapperNode [2020-09-21 11:21:29,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:21:29,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:21:29,238 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:21:29,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:21:29,252 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:29" (1/1) ... [2020-09-21 11:21:29,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:29" (1/1) ... [2020-09-21 11:21:29,258 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:29" (1/1) ... [2020-09-21 11:21:29,258 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:29" (1/1) ... [2020-09-21 11:21:29,341 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:29" (1/1) ... [2020-09-21 11:21:29,345 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:29" (1/1) ... [2020-09-21 11:21:29,346 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:29" (1/1) ... [2020-09-21 11:21:29,349 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:21:29,349 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:21:29,349 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:21:29,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:21:29,350 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:29" (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 11:21:29,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:21:29,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:21:29,422 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-09-21 11:21:29,423 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-09-21 11:21:29,423 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:21:29,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-21 11:21:29,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:21:29,423 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-09-21 11:21:29,423 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-09-21 11:21:29,424 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:21:29,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:21:29,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:21:29,642 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:21:29,642 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 11:21:29,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:21:29 BoogieIcfgContainer [2020-09-21 11:21:29,649 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:21:29,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:21:29,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:21:29,667 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:21:29,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:21:28" (1/3) ... [2020-09-21 11:21:29,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bd8b02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:21:29, skipping insertion in model container [2020-09-21 11:21:29,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:21:29" (2/3) ... [2020-09-21 11:21:29,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bd8b02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:21:29, skipping insertion in model container [2020-09-21 11:21:29,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:21:29" (3/3) ... [2020-09-21 11:21:29,685 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b3_o2.c [2020-09-21 11:21:29,710 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:21:29,725 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:21:29,749 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:21:29,780 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:21:29,780 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:21:29,780 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:21:29,780 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:21:29,781 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:21:29,781 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:21:29,781 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:21:29,781 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:21:29,800 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-09-21 11:21:29,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-21 11:21:29,807 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:21:29,808 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:21:29,809 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:21:29,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:21:29,815 INFO L82 PathProgramCache]: Analyzing trace with hash 128923731, now seen corresponding path program 1 times [2020-09-21 11:21:29,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:21:29,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183350353] [2020-09-21 11:21:29,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:21:29,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:29,983 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:29,984 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:29,984 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:29,984 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:29,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-21 11:21:29,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:29,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-09-21 11:21:29,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:29,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:21:29,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-21 11:21:29,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:21:29,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:30,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:21:30,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:30,066 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:30,066 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:30,067 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:30,067 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:30,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:21:30,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:30,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:21:30,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:30,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:21:30,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:30,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:21:30,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:30,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:21:30,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:30,087 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:30,087 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:30,087 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:30,088 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:30,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:21:30,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:30,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 11:21:30,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:30,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:21:30,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:30,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:21:30,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:30,117 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 11:21:30,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183350353] [2020-09-21 11:21:30,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:21:30,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 11:21:30,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189099615] [2020-09-21 11:21:30,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:21:30,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:21:30,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:21:30,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:21:30,151 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2020-09-21 11:21:30,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:21:30,216 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-09-21 11:21:30,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:21:30,218 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-21 11:21:30,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:21:30,231 INFO L225 Difference]: With dead ends: 40 [2020-09-21 11:21:30,231 INFO L226 Difference]: Without dead ends: 26 [2020-09-21 11:21:30,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:21:30,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-21 11:21:30,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-09-21 11:21:30,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-09-21 11:21:30,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-09-21 11:21:30,282 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2020-09-21 11:21:30,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:21:30,282 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-09-21 11:21:30,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:21:30,282 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-09-21 11:21:30,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 11:21:30,284 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:21:30,284 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:21:30,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:21:30,285 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:21:30,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:21:30,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1945633833, now seen corresponding path program 1 times [2020-09-21 11:21:30,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:21:30,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863827874] [2020-09-21 11:21:30,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:21:30,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:30,329 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:30,329 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:30,329 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:30,330 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:30,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-21 11:21:30,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:30,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-21 11:21:30,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:30,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:21:30,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-21 11:21:30,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:21:30,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:30,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:21:30,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:30,369 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:30,369 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:30,369 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:30,369 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:30,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:21:30,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:30,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:21:30,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:30,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:21:30,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:30,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:21:30,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:30,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:21:30,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:30,391 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:30,392 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:30,392 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:30,392 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:30,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-21 11:21:30,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:30,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 11:21:30,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:30,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:21:30,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:30,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 11:21:30,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:30,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:30,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:30,421 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:30,422 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:30,422 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:30,422 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:30,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:21:30,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:30,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 11:21:30,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:30,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:21:30,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:30,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:21:30,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:30,435 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 11:21:30,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863827874] [2020-09-21 11:21:30,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:21:30,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 11:21:30,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892190994] [2020-09-21 11:21:30,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:21:30,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:21:30,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:21:30,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:21:30,439 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2020-09-21 11:21:30,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:21:30,461 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-09-21 11:21:30,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:21:30,462 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-09-21 11:21:30,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:21:30,463 INFO L225 Difference]: With dead ends: 32 [2020-09-21 11:21:30,464 INFO L226 Difference]: Without dead ends: 28 [2020-09-21 11:21:30,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:21:30,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-21 11:21:30,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-09-21 11:21:30,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-09-21 11:21:30,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-09-21 11:21:30,472 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2020-09-21 11:21:30,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:21:30,473 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-09-21 11:21:30,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:21:30,473 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-09-21 11:21:30,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 11:21:30,474 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:21:30,475 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:21:30,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:21:30,475 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:21:30,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:21:30,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1974262984, now seen corresponding path program 1 times [2020-09-21 11:21:30,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:21:30,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427762383] [2020-09-21 11:21:30,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:21:30,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:30,539 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:30,540 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:30,540 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:30,540 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:30,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-21 11:21:30,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:30,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-09-21 11:21:30,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:30,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:21:30,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-21 11:21:30,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-21 11:21:30,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:30,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:21:30,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:30,620 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:30,621 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:30,621 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:30,621 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:30,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:21:30,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:30,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:21:30,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:30,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:21:30,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:30,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:21:30,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:30,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:21:30,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:30,681 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:30,681 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:30,681 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:30,682 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:30,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-21 11:21:30,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:30,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-09-21 11:21:30,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:30,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:21:30,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:30,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 11:21:30,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:30,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:30,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:30,792 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:30,792 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:30,793 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:30,793 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:30,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:21:30,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:30,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-21 11:21:30,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:30,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:21:30,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:30,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:21:30,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:21:30,841 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 11:21:30,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427762383] [2020-09-21 11:21:30,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:21:30,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-21 11:21:30,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090448394] [2020-09-21 11:21:30,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 11:21:30,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:21:30,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 11:21:30,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:21:30,845 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2020-09-21 11:21:30,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:21:30,946 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-09-21 11:21:30,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 11:21:30,947 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-09-21 11:21:30,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:21:30,948 INFO L225 Difference]: With dead ends: 48 [2020-09-21 11:21:30,948 INFO L226 Difference]: Without dead ends: 32 [2020-09-21 11:21:30,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:21:30,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-09-21 11:21:30,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-09-21 11:21:30,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-21 11:21:30,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-09-21 11:21:30,957 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2020-09-21 11:21:30,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:21:30,957 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-09-21 11:21:30,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 11:21:30,957 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-09-21 11:21:30,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-21 11:21:30,959 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:21:30,959 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:21:30,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:21:30,959 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:21:30,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:21:30,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1451784300, now seen corresponding path program 1 times [2020-09-21 11:21:30,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:21:30,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428846500] [2020-09-21 11:21:30,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:21:30,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:30,986 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:30,986 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:30,986 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:30,987 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:30,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-21 11:21:30,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:30,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 11:21:30,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:30,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:21:30,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-09-21 11:21:30,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:21:30,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:31,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:21:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:31,003 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:31,003 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:31,003 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:31,003 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:31,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:21:31,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:31,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:21:31,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:31,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:21:31,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:31,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:21:31,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:31,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:21:31,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:31,025 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:31,025 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:31,025 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:31,025 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:31,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 11:21:31,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:31,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-21 11:21:31,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:31,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:21:31,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-21 11:21:31,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:21:31,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:31,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:31,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:31,080 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:31,080 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:31,081 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:31,081 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:31,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-21 11:21:31,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:31,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 11:21:31,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:31,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:21:31,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:31,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 11:21:31,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:31,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:21:31,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:21:31,099 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:21:31,100 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:21:31,100 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:21:31,100 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:21:31,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:21:31,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:21:31,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:21:31,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:21:31,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:21:31,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:21:31,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:21:31,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:21:31,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 11:21:31,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428846500] [2020-09-21 11:21:31,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:21:31,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 11:21:31,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99324363] [2020-09-21 11:21:31,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:21:31,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:21:31,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:21:31,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:21:31,110 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-09-21 11:21:31,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:21:31,131 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-09-21 11:21:31,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:21:31,131 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-09-21 11:21:31,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:21:31,133 INFO L225 Difference]: With dead ends: 50 [2020-09-21 11:21:31,133 INFO L226 Difference]: Without dead ends: 36 [2020-09-21 11:21:31,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:21:31,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-21 11:21:31,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-09-21 11:21:31,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-21 11:21:31,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-09-21 11:21:31,141 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2020-09-21 11:21:31,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:21:31,142 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-09-21 11:21:31,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:21:31,142 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-09-21 11:21:31,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-21 11:21:31,143 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:21:31,143 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:21:31,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:21:31,144 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:21:31,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:21:31,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1255270795, now seen corresponding path program 1 times [2020-09-21 11:21:31,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:21:31,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395491074] [2020-09-21 11:21:31,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:21:31,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 11:21:31,159 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 11:21:31,159 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 11:21:31,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:21:31,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:21:31 BoogieIcfgContainer [2020-09-21 11:21:31,187 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:21:31,190 INFO L168 Benchmark]: Toolchain (without parser) took 2252.67 ms. Allocated memory was 141.0 MB in the beginning and 232.8 MB in the end (delta: 91.8 MB). Free memory was 104.9 MB in the beginning and 173.4 MB in the end (delta: -68.5 MB). Peak memory consumption was 23.3 MB. Max. memory is 7.1 GB. [2020-09-21 11:21:31,191 INFO L168 Benchmark]: CDTParser took 0.75 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 11:21:31,192 INFO L168 Benchmark]: CACSL2BoogieTranslator took 295.43 ms. Allocated memory is still 141.0 MB. Free memory was 104.2 MB in the beginning and 94.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-21 11:21:31,193 INFO L168 Benchmark]: Boogie Preprocessor took 111.33 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 94.7 MB in the beginning and 183.1 MB in the end (delta: -88.4 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-09-21 11:21:31,194 INFO L168 Benchmark]: RCFGBuilder took 300.29 ms. Allocated memory is still 203.9 MB. Free memory was 183.1 MB in the beginning and 170.0 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-09-21 11:21:31,195 INFO L168 Benchmark]: TraceAbstraction took 1525.08 ms. Allocated memory was 203.9 MB in the beginning and 232.8 MB in the end (delta: 28.8 MB). Free memory was 170.0 MB in the beginning and 173.4 MB in the end (delta: -3.4 MB). Peak memory consumption was 25.4 MB. Max. memory is 7.1 GB. [2020-09-21 11:21:31,199 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.75 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 295.43 ms. Allocated memory is still 141.0 MB. Free memory was 104.2 MB in the beginning and 94.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 111.33 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 94.7 MB in the beginning and 183.1 MB in the end (delta: -88.4 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 300.29 ms. Allocated memory is still 203.9 MB. Free memory was 183.1 MB in the beginning and 170.0 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1525.08 ms. Allocated memory was 203.9 MB in the beginning and 232.8 MB in the end (delta: 28.8 MB). Free memory was 170.0 MB in the beginning and 173.4 MB in the end (delta: -3.4 MB). Peak memory consumption was 25.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 25]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L22] unsigned int input = __VERIFIER_nondet_uint(); [L23] CALL, EXPR id(input) [L8] COND FALSE !(x==0) [L9] CALL, EXPR id2(x-1) [L15] COND FALSE !(x==0) [L16] CALL, EXPR id(x-1) [L8] COND TRUE x==0 [L8] return 0; [L16] RET, EXPR id(x-1) [L16] unsigned int ret = id(x-1) + 1; [L17] COND FALSE !(ret > 3) [L18] return ret; [L9] RET, EXPR id2(x-1) [L9] unsigned int ret = id2(x-1) + 1; [L10] COND FALSE !(ret > 3) [L11] return ret; [L23] RET, EXPR id(input) [L23] unsigned int result = id(input); [L24] COND TRUE result == 2 [L25] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.3s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 117 SDtfs, 6 SDslu, 405 SDs, 0 SdLazy, 57 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=4, 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, 4 MinimizatonAttempts, 6 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 107 NumberOfCodeBlocks, 107 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 76 ConstructedInterpolants, 0 QuantifiedInterpolants, 3094 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 4/4 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...