/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 enumeration-timeout=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --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/Fibonacci01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:21:24,272 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:21:24,276 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:21:24,303 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:21:24,304 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:21:24,305 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:21:24,306 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:21:24,309 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:21:24,311 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:21:24,312 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:21:24,313 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:21:24,314 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:21:24,315 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:21:24,316 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:21:24,320 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:21:24,322 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:21:24,323 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:21:24,328 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:21:24,331 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:21:24,335 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:21:24,337 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:21:24,338 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:21:24,343 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:21:24,344 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:21:24,350 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:21:24,350 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:21:24,351 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:21:24,355 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:21:24,356 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:21:24,358 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:21:24,358 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:21:24,360 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:21:24,361 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:21:24,362 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:21:24,365 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:21:24,365 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:21:24,366 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:21:24,366 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:21:24,366 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:21:24,367 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:21:24,369 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:21:24,370 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 12:21:24,430 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:21:24,430 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:21:24,432 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:21:24,432 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:21:24,432 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:21:24,433 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:21:24,433 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:21:24,433 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:21:24,434 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:21:24,434 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:21:24,435 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:21:24,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:21:24,435 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:21:24,436 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:21:24,436 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:21:24,436 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:21:24,436 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:21:24,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:21:24,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:21:24,437 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:21:24,437 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:21:24,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:21:24,438 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:21:24,438 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:21:24,438 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:21:24,438 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:21:24,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:21:24,439 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:21:24,439 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:21:24,439 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;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:21:24,935 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:21:24,958 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:21:24,963 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:21:24,965 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:21:24,965 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:21:24,967 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci01-1.c [2020-09-21 12:21:25,049 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9f5faf791/a7e915d72de64d50ad175423e3e157ad/FLAG9e9db9b93 [2020-09-21 12:21:25,586 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:21:25,587 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/Fibonacci01-1.c [2020-09-21 12:21:25,596 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9f5faf791/a7e915d72de64d50ad175423e3e157ad/FLAG9e9db9b93 [2020-09-21 12:21:25,937 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9f5faf791/a7e915d72de64d50ad175423e3e157ad [2020-09-21 12:21:25,954 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:21:25,959 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:21:25,962 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:21:25,963 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:21:25,967 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:21:25,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:21:25" (1/1) ... [2020-09-21 12:21:25,974 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19617743 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:25, skipping insertion in model container [2020-09-21 12:21:25,975 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:21:25" (1/1) ... [2020-09-21 12:21:25,986 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:21:26,014 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:21:26,315 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:21:26,323 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:21:26,350 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:21:26,373 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:21:26,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:26 WrapperNode [2020-09-21 12:21:26,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:21:26,376 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:21:26,377 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:21:26,377 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:21:26,396 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:26" (1/1) ... [2020-09-21 12:21:26,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:26" (1/1) ... [2020-09-21 12:21:26,485 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:26" (1/1) ... [2020-09-21 12:21:26,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:26" (1/1) ... [2020-09-21 12:21:26,492 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:26" (1/1) ... [2020-09-21 12:21:26,497 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:26" (1/1) ... [2020-09-21 12:21:26,498 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:26" (1/1) ... [2020-09-21 12:21:26,503 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:21:26,504 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:21:26,504 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:21:26,504 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:21:26,506 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:26" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:21:26,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:21:26,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:21:26,585 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-09-21 12:21:26,585 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:21:26,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:21:26,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 12:21:26,586 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-09-21 12:21:26,586 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:21:26,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:21:26,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:21:26,814 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:21:26,815 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 12:21:26,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:21:26 BoogieIcfgContainer [2020-09-21 12:21:26,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:21:26,821 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:21:26,821 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:21:26,825 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:21:26,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:21:25" (1/3) ... [2020-09-21 12:21:26,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d732ff7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:21:26, skipping insertion in model container [2020-09-21 12:21:26,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:26" (2/3) ... [2020-09-21 12:21:26,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d732ff7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:21:26, skipping insertion in model container [2020-09-21 12:21:26,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:21:26" (3/3) ... [2020-09-21 12:21:26,830 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci01-1.c [2020-09-21 12:21:26,842 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:21:26,853 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:21:26,876 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:21:26,906 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:21:26,906 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:21:26,906 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:21:26,907 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:21:26,907 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:21:26,907 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:21:26,907 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:21:26,907 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:21:26,927 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-09-21 12:21:26,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-21 12:21:26,935 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:26,936 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:21:26,936 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:26,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:26,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1900973920, now seen corresponding path program 1 times [2020-09-21 12:21:26,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:26,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495046691] [2020-09-21 12:21:26,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:27,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:27,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:27,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:27,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-21 12:21:27,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:27,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-09-21 12:21:27,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:27,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:21:27,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 12:21:27,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 12:21:27,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 12:21:27,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:27,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:27,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:27,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:27,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:27,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:27,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:21:27,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:27,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:27,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:27,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:27,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:27,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:21:27,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:27,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:27,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:27,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:21:27,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:27,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-21 12:21:27,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:27,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:21:27,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:27,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 12:21:27,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:27,410 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 12:21:27,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495046691] [2020-09-21 12:21:27,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:21:27,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 12:21:27,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090556202] [2020-09-21 12:21:27,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:21:27,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:27,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:21:27,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:21:27,454 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 6 states. [2020-09-21 12:21:27,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:27,615 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-09-21 12:21:27,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:21:27,618 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-09-21 12:21:27,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:27,632 INFO L225 Difference]: With dead ends: 36 [2020-09-21 12:21:27,633 INFO L226 Difference]: Without dead ends: 22 [2020-09-21 12:21:27,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:21:27,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-21 12:21:27,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-09-21 12:21:27,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-21 12:21:27,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-09-21 12:21:27,695 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2020-09-21 12:21:27,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:27,696 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-09-21 12:21:27,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:21:27,696 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-09-21 12:21:27,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-21 12:21:27,699 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:27,700 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:21:27,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:21:27,701 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:27,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:27,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1203666899, now seen corresponding path program 1 times [2020-09-21 12:21:27,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:27,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721377470] [2020-09-21 12:21:27,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:27,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:27,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:27,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:28,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:28,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-21 12:21:28,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:21:28,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 613 [2020-09-21 12:21:28,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:28,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:21:28,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-21 12:21:28,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 12:21:28,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 12:21:28,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:28,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:28,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:28,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:28,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:28,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:28,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:21:28,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:28,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:28,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:28,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:28,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:28,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:21:28,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:28,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:28,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:28,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-21 12:21:28,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:28,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-09-21 12:21:28,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:28,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:21:28,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-21 12:21:28,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 12:21:28,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:28,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 12:21:28,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:28,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:28,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:28,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:21:28,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:28,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-21 12:21:28,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:28,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:21:28,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:21:28,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:21:28,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:28,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 12:21:28,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:28,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:28,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:28,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:21:28,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:28,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:21:28,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:28,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:28,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 12:21:28,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:28,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:28,637 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-21 12:21:28,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721377470] [2020-09-21 12:21:28,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:21:28,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 12:21:28,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052074196] [2020-09-21 12:21:28,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:21:28,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:28,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:21:28,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:21:28,645 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 6 states. [2020-09-21 12:21:28,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:28,766 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2020-09-21 12:21:28,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:21:28,767 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-09-21 12:21:28,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:28,768 INFO L225 Difference]: With dead ends: 39 [2020-09-21 12:21:28,769 INFO L226 Difference]: Without dead ends: 24 [2020-09-21 12:21:28,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-21 12:21:28,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-21 12:21:28,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-09-21 12:21:28,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-21 12:21:28,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-09-21 12:21:28,779 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 27 [2020-09-21 12:21:28,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:28,780 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-09-21 12:21:28,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:21:28,780 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-09-21 12:21:28,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 12:21:28,782 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:28,782 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:21:28,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:21:28,783 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:28,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:28,783 INFO L82 PathProgramCache]: Analyzing trace with hash -603082491, now seen corresponding path program 1 times [2020-09-21 12:21:28,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:28,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161316821] [2020-09-21 12:21:28,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:28,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:28,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:28,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:29,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:29,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-21 12:21:29,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:21:29,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 507 [2020-09-21 12:21:29,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:29,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-21 12:21:29,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 12:21:29,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-21 12:21:29,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:29,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:29,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:29,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:29,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:29,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:29,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:29,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:21:29,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:29,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:29,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:29,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:29,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:29,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:21:29,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:29,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:29,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:29,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:29,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 12:21:29,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:21:29,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-09-21 12:21:29,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:29,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-21 12:21:29,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:29,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-21 12:21:29,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:29,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 12:21:29,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:29,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:29,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:29,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:29,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:29,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-21 12:21:29,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:29,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:21:29,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:29,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 12:21:29,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:29,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 12:21:29,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:29,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:29,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:29,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:21:29,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:29,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-21 12:21:29,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:29,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:21:29,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:29,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:21:29,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:29,602 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-21 12:21:29,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161316821] [2020-09-21 12:21:29,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:21:29,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 12:21:29,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804971388] [2020-09-21 12:21:29,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 12:21:29,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:29,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 12:21:29,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:21:29,606 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 10 states. [2020-09-21 12:21:29,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:29,814 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2020-09-21 12:21:29,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 12:21:29,815 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-09-21 12:21:29,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:29,817 INFO L225 Difference]: With dead ends: 34 [2020-09-21 12:21:29,818 INFO L226 Difference]: Without dead ends: 30 [2020-09-21 12:21:29,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-21 12:21:29,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-21 12:21:29,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-09-21 12:21:29,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-09-21 12:21:29,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2020-09-21 12:21:29,828 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 28 [2020-09-21 12:21:29,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:29,829 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2020-09-21 12:21:29,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 12:21:29,829 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2020-09-21 12:21:29,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-21 12:21:29,831 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:29,831 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:21:29,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:21:29,832 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:29,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:29,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1116968431, now seen corresponding path program 1 times [2020-09-21 12:21:29,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:29,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463896648] [2020-09-21 12:21:29,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:29,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:29,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:29,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:29,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:30,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:30,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:30,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-21 12:21:30,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:21:30,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 598 [2020-09-21 12:21:30,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:30,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:21:30,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-21 12:21:30,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-21 12:21:30,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:30,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:30,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:30,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:30,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:30,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:30,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:30,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:30,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:30,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:30,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:30,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:30,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:30,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:21:30,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:30,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:30,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:30,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:30,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-21 12:21:30,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:21:30,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-09-21 12:21:30,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:30,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:21:30,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 12:21:30,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 12:21:30,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:30,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 12:21:30,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:30,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:30,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:30,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:30,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:30,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-21 12:21:30,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:30,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:21:30,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:30,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 12:21:30,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:30,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 12:21:30,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:30,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:30,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:30,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:30,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:30,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-21 12:21:30,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:30,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:21:30,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:21:30,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 12:21:30,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:30,667 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-21 12:21:30,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463896648] [2020-09-21 12:21:30,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:21:30,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 12:21:30,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442790311] [2020-09-21 12:21:30,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 12:21:30,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:30,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 12:21:30,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:21:30,673 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand 7 states. [2020-09-21 12:21:30,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:30,822 INFO L93 Difference]: Finished difference Result 54 states and 78 transitions. [2020-09-21 12:21:30,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:21:30,823 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-09-21 12:21:30,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:30,825 INFO L225 Difference]: With dead ends: 54 [2020-09-21 12:21:30,825 INFO L226 Difference]: Without dead ends: 32 [2020-09-21 12:21:30,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:21:30,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-09-21 12:21:30,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-09-21 12:21:30,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-09-21 12:21:30,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2020-09-21 12:21:30,836 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 29 [2020-09-21 12:21:30,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:30,836 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2020-09-21 12:21:30,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 12:21:30,836 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2020-09-21 12:21:30,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-21 12:21:30,838 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:30,838 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:21:30,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:21:30,839 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:30,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:30,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1293014720, now seen corresponding path program 2 times [2020-09-21 12:21:30,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:30,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588539909] [2020-09-21 12:21:30,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:30,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:30,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:30,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:30,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:31,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:31,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:31,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-21 12:21:31,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:21:31,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1004 [2020-09-21 12:21:31,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:31,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:21:31,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-21 12:21:31,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-21 12:21:31,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:31,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:31,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:31,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:31,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:31,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:31,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:31,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:31,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:31,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:31,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:31,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:31,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:31,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:21:31,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:31,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:31,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:31,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:32,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:32,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-21 12:21:32,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:21:32,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 413 [2020-09-21 12:21:32,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:32,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:21:32,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 12:21:32,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-21 12:21:32,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:32,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 12:21:32,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:32,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:32,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:32,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:32,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:32,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-21 12:21:32,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:32,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:21:32,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:32,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 12:21:32,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:32,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 12:21:32,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:32,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:32,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:32,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:32,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:32,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 12:21:32,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:21:32,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-09-21 12:21:32,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:32,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:21:32,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:21:32,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-21 12:21:32,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:32,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 12:21:32,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:32,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:32,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:32,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:32,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:32,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-21 12:21:32,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:32,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:21:32,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:32,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 12:21:32,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:32,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 12:21:32,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:32,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:32,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:32,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:21:32,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:32,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-21 12:21:32,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:32,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:21:32,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:32,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:21:32,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:32,557 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-21 12:21:32,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588539909] [2020-09-21 12:21:32,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:21:32,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 12:21:32,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413130771] [2020-09-21 12:21:32,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 12:21:32,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:32,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 12:21:32,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:21:32,559 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand 7 states. [2020-09-21 12:21:32,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:32,734 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-09-21 12:21:32,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 12:21:32,734 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-09-21 12:21:32,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:32,736 INFO L225 Difference]: With dead ends: 54 [2020-09-21 12:21:32,736 INFO L226 Difference]: Without dead ends: 31 [2020-09-21 12:21:32,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-09-21 12:21:32,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-21 12:21:32,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-09-21 12:21:32,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-21 12:21:32,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-09-21 12:21:32,744 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 42 [2020-09-21 12:21:32,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:32,745 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-09-21 12:21:32,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 12:21:32,745 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-09-21 12:21:32,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-21 12:21:32,746 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:32,747 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:21:32,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 12:21:32,747 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:32,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:32,748 INFO L82 PathProgramCache]: Analyzing trace with hash -2046185202, now seen corresponding path program 3 times [2020-09-21 12:21:32,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:32,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383202350] [2020-09-21 12:21:32,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:32,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:32,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:32,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:32,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:32,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:33,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:33,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:33,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-21 12:21:33,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-21 12:21:33,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1003 [2020-09-21 12:21:33,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:33,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 12:21:33,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-21 12:21:33,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-21 12:21:33,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:33,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:33,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:33,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:33,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:33,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:33,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:33,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:33,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:33,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:33,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:33,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:33,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:33,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:21:33,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:33,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:33,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:33,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:33,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:34,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:34,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-21 12:21:34,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:21:34,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 947 [2020-09-21 12:21:34,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:34,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 12:21:34,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 12:21:34,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-21 12:21:34,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:34,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 12:21:34,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:34,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:34,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:34,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:34,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:34,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 12:21:34,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:21:34,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 228 [2020-09-21 12:21:34,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:34,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:21:34,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:34,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-21 12:21:34,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:35,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 12:21:35,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:35,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:35,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:35,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:35,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:35,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 12:21:35,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:35,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:21:35,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:35,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 12:21:35,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:35,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 12:21:35,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:35,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:35,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:35,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:21:35,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:35,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-21 12:21:35,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:35,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:21:35,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:35,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:21:35,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:35,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-21 12:21:35,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:35,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:35,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:35,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:21:35,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:35,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:21:35,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:35,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:21:35,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:21:35,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:21:35,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:35,118 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-21 12:21:35,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383202350] [2020-09-21 12:21:35,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:21:35,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 12:21:35,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356590250] [2020-09-21 12:21:35,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 12:21:35,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:35,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 12:21:35,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:21:35,121 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 8 states. [2020-09-21 12:21:35,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:35,300 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-09-21 12:21:35,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 12:21:35,300 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-09-21 12:21:35,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:35,302 INFO L225 Difference]: With dead ends: 55 [2020-09-21 12:21:35,302 INFO L226 Difference]: Without dead ends: 31 [2020-09-21 12:21:35,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-21 12:21:35,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-21 12:21:35,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-09-21 12:21:35,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-21 12:21:35,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-09-21 12:21:35,309 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 41 [2020-09-21 12:21:35,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:35,310 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-09-21 12:21:35,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 12:21:35,310 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-09-21 12:21:35,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-21 12:21:35,312 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:35,312 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:21:35,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 12:21:35,312 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:35,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:35,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1391487784, now seen corresponding path program 4 times [2020-09-21 12:21:35,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:35,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837996579] [2020-09-21 12:21:35,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:35,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:35,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:35,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:35,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:36,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:36,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-21 12:21:36,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:21:36,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1003 [2020-09-21 12:21:36,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:36,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-21 12:21:36,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 12:21:36,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-21 12:21:36,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:36,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:36,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:36,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:36,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:36,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:36,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:36,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:36,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:36,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:36,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:36,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:36,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:36,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:21:36,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:36,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:36,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:36,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:37,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:37,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-21 12:21:37,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:21:37,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1002 [2020-09-21 12:21:37,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:37,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-21 12:21:37,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:37,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-21 12:21:37,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:37,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 12:21:37,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:37,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:37,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:37,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 12:21:37,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:37,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-09-21 12:21:37,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:37,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 12:21:37,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:37,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-21 12:21:37,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:37,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 12:21:37,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:37,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:37,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:37,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:37,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:37,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-21 12:21:37,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:37,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:21:37,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:37,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:21:37,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:37,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 12:21:37,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:37,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:37,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:37,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:21:37,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:37,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-21 12:21:37,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:37,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:21:37,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:37,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:21:37,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:37,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-21 12:21:37,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:37,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:37,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:37,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:37,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:37,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-21 12:21:37,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:37,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:21:37,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:37,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 12:21:37,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:37,678 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-21 12:21:37,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837996579] [2020-09-21 12:21:37,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:21:37,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-21 12:21:37,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21732362] [2020-09-21 12:21:37,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-21 12:21:37,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:37,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-21 12:21:37,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-09-21 12:21:37,681 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 14 states. [2020-09-21 12:21:37,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:37,990 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2020-09-21 12:21:37,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 12:21:37,990 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-09-21 12:21:37,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:37,992 INFO L225 Difference]: With dead ends: 41 [2020-09-21 12:21:37,992 INFO L226 Difference]: Without dead ends: 37 [2020-09-21 12:21:37,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-21 12:21:37,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-21 12:21:38,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-09-21 12:21:38,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-21 12:21:38,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2020-09-21 12:21:38,002 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 42 [2020-09-21 12:21:38,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:38,002 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2020-09-21 12:21:38,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-21 12:21:38,003 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2020-09-21 12:21:38,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-21 12:21:38,004 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:38,004 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:21:38,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 12:21:38,005 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:38,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:38,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1554048393, now seen corresponding path program 5 times [2020-09-21 12:21:38,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:38,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700927928] [2020-09-21 12:21:38,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:38,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:38,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:38,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:38,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:38,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:38,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:38,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:39,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:39,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-21 12:21:39,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-21 12:21:39,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-09-21 12:21:39,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:39,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 12:21:39,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-21 12:21:39,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-21 12:21:39,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:39,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:39,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:39,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:39,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:39,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:39,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:39,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:39,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:39,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:39,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:39,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:39,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:39,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:21:39,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:39,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:39,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:39,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:39,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:39,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:39,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:39,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:40,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:40,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-09-21 12:21:40,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-21 12:21:40,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-09-21 12:21:40,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:40,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 12:21:40,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 12:21:40,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-21 12:21:40,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:40,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 12:21:40,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:40,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:40,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:40,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:40,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:40,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 12:21:40,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:21:40,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-09-21 12:21:40,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:40,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:21:40,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:40,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-21 12:21:40,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:40,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 12:21:40,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:40,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:40,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:40,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:40,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:40,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-21 12:21:40,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:40,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:21:40,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:40,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 12:21:40,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:40,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 12:21:40,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:40,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:40,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:40,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:21:40,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:40,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 12:21:40,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:40,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:21:40,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:40,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:21:40,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:40,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-21 12:21:40,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:40,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:40,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:40,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:40,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:40,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 12:21:40,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:21:40,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-09-21 12:21:40,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:40,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:21:40,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:21:40,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-21 12:21:40,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:40,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 12:21:40,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:40,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:40,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:40,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:40,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:40,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:21:40,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:40,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:21:40,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:40,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 12:21:40,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:40,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 12:21:40,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:40,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:40,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:40,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:21:40,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:40,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-21 12:21:40,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:40,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:21:40,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:40,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:21:40,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:40,608 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 31 proven. 39 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-09-21 12:21:40,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700927928] [2020-09-21 12:21:40,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:21:40,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 12:21:40,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404137627] [2020-09-21 12:21:40,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 12:21:40,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:40,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 12:21:40,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:21:40,614 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand 8 states. [2020-09-21 12:21:40,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:40,815 INFO L93 Difference]: Finished difference Result 71 states and 97 transitions. [2020-09-21 12:21:40,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 12:21:40,816 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-09-21 12:21:40,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:40,817 INFO L225 Difference]: With dead ends: 71 [2020-09-21 12:21:40,818 INFO L226 Difference]: Without dead ends: 42 [2020-09-21 12:21:40,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-09-21 12:21:40,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-21 12:21:40,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2020-09-21 12:21:40,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-21 12:21:40,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-09-21 12:21:40,825 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 55 [2020-09-21 12:21:40,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:40,826 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-09-21 12:21:40,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 12:21:40,826 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-09-21 12:21:40,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-21 12:21:40,827 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:40,827 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:21:40,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 12:21:40,828 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:40,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:40,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1007952971, now seen corresponding path program 6 times [2020-09-21 12:21:40,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:40,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289494217] [2020-09-21 12:21:40,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:40,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:40,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:40,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:40,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:40,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:41,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:41,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:41,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-09-21 12:21:41,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-21 12:21:41,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1004 [2020-09-21 12:21:41,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:41,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 12:21:41,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-21 12:21:41,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-09-21 12:21:41,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:41,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:41,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:41,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:41,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:41,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:41,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:41,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:41,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:41,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:41,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:41,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:41,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:41,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:21:41,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:41,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:41,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:41,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:41,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:42,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:42,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:42,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-21 12:21:42,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-21 12:21:42,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-09-21 12:21:42,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:42,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 12:21:42,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 12:21:42,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-09-21 12:21:42,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:42,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 12:21:42,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:42,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:42,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:42,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:43,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:43,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:43,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:43,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-21 12:21:43,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-21 12:21:43,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 962 [2020-09-21 12:21:43,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:43,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:21:43,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:43,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-21 12:21:43,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:43,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 12:21:43,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:43,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:43,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:43,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 12:21:43,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:43,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-21 12:21:43,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:43,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:21:43,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:43,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-21 12:21:43,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:43,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 12:21:43,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:43,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:43,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:43,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:43,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:43,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:21:43,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:43,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:43,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:43,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:43,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:43,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 12:21:43,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:43,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:43,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:43,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:21:43,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:43,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:21:43,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:43,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:43,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:43,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:43,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:43,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-21 12:21:43,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:43,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:43,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:43,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:43,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:43,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:21:43,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-21 12:21:43,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:43,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:21:43,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:43,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 12:21:43,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:44,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 12:21:44,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:44,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:44,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:44,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:44,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:44,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-21 12:21:44,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:44,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:21:44,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:21:44,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 12:21:44,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:44,072 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 61 proven. 12 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-09-21 12:21:44,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289494217] [2020-09-21 12:21:44,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:21:44,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 12:21:44,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503645623] [2020-09-21 12:21:44,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 12:21:44,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:44,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 12:21:44,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:21:44,084 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 8 states. [2020-09-21 12:21:44,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:44,283 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2020-09-21 12:21:44,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 12:21:44,284 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-09-21 12:21:44,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:44,288 INFO L225 Difference]: With dead ends: 73 [2020-09-21 12:21:44,288 INFO L226 Difference]: Without dead ends: 41 [2020-09-21 12:21:44,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-09-21 12:21:44,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-21 12:21:44,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-09-21 12:21:44,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-21 12:21:44,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-09-21 12:21:44,301 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 56 [2020-09-21 12:21:44,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:44,303 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-09-21 12:21:44,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 12:21:44,303 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-09-21 12:21:44,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-21 12:21:44,306 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:44,306 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:21:44,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 12:21:44,307 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:44,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:44,307 INFO L82 PathProgramCache]: Analyzing trace with hash -865837754, now seen corresponding path program 7 times [2020-09-21 12:21:44,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:44,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862469039] [2020-09-21 12:21:44,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:44,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:44,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:44,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:44,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:45,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:45,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-09-21 12:21:45,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:21:45,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1010 [2020-09-21 12:21:45,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:45,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-21 12:21:45,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 12:21:45,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-21 12:21:45,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:45,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:45,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:45,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:45,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:45,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:45,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:45,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:21:45,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:45,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:45,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:45,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:45,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:45,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:21:45,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:45,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:45,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:45,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:46,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:46,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:46,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-09-21 12:21:46,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:21:46,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1059 [2020-09-21 12:21:46,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:46,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-09-21 12:21:46,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:46,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-09-21 12:21:46,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:46,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 12:21:46,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:46,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:46,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:46,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-21 12:21:46,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:46,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-09-21 12:21:46,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:46,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-21 12:21:46,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:46,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-21 12:21:46,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:46,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 12:21:46,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:46,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:46,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:46,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 12:21:46,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:46,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-09-21 12:21:46,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:46,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 12:21:46,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:46,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-21 12:21:46,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:46,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 12:21:46,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:46,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:46,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:46,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:46,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:46,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 12:21:46,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:46,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:21:46,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:46,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:21:46,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:46,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 12:21:46,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:46,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:46,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:46,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:21:46,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:46,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-21 12:21:46,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:46,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:21:46,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:46,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:21:46,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:46,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-21 12:21:46,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:46,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:46,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:46,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:46,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:46,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-21 12:21:46,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:46,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:21:46,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:46,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 12:21:46,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:46,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 12:21:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:46,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:47,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:47,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:47,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 12:21:47,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:21:47,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-09-21 12:21:47,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:47,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-21 12:21:47,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:47,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-21 12:21:47,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:47,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 12:21:47,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:47,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:47,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:47,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:21:47,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:47,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-21 12:21:47,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:47,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:21:47,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:47,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 12:21:47,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:47,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 12:21:47,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:47,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:47,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:47,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:21:47,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:47,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-09-21 12:21:47,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:47,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:21:47,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:47,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:21:47,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:47,272 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 38 proven. 89 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-09-21 12:21:47,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862469039] [2020-09-21 12:21:47,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:21:47,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-21 12:21:47,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379104642] [2020-09-21 12:21:47,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-21 12:21:47,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:47,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-21 12:21:47,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2020-09-21 12:21:47,275 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 22 states. [2020-09-21 12:21:47,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:47,793 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2020-09-21 12:21:47,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 12:21:47,794 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 69 [2020-09-21 12:21:47,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:47,794 INFO L225 Difference]: With dead ends: 41 [2020-09-21 12:21:47,794 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 12:21:47,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2020-09-21 12:21:47,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 12:21:47,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 12:21:47,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 12:21:47,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 12:21:47,796 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 69 [2020-09-21 12:21:47,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:47,797 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 12:21:47,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-21 12:21:47,797 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 12:21:47,797 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 12:21:47,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 12:21:47,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 12:21:48,258 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 24 [2020-09-21 12:21:48,264 INFO L268 CegarLoopResult]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2020-09-21 12:21:48,264 INFO L271 CegarLoopResult]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2020-09-21 12:21:48,264 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (= fibonacci_~n |fibonacci_#in~n|) (<= 2 |fibonacci_#in~n|)) [2020-09-21 12:21:48,264 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-09-21 12:21:48,265 INFO L264 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse1 (= fibonacci_~n |fibonacci_#in~n|))) (let ((.cse0 (and (not (= 3 fibonacci_~n)) .cse1 (<= (+ |fibonacci_#in~n| 2) (+ fibonacci_~n |fibonacci_#t~ret0|)) (<= 3 |fibonacci_#in~n|)))) (and (or .cse0 (= |fibonacci_#t~ret0| 1)) (or (and .cse1 (< 2 fibonacci_~n) (<= fibonacci_~n 3)) .cse0 (and (<= fibonacci_~n 2) .cse1 (< 1 fibonacci_~n)))))) [2020-09-21 12:21:48,265 INFO L268 CegarLoopResult]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2020-09-21 12:21:48,265 INFO L268 CegarLoopResult]: For program point L17(lines 17 21) no Hoare annotation was computed. [2020-09-21 12:21:48,265 INFO L268 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2020-09-21 12:21:48,265 INFO L268 CegarLoopResult]: For program point L15(lines 15 21) no Hoare annotation was computed. [2020-09-21 12:21:48,265 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-21 12:21:48,266 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 12:21:48,266 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 12:21:48,266 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 12:21:48,266 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 12:21:48,266 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 12:21:48,266 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 34) no Hoare annotation was computed. [2020-09-21 12:21:48,266 INFO L268 CegarLoopResult]: For program point L31(lines 31 35) no Hoare annotation was computed. [2020-09-21 12:21:48,267 INFO L271 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: true [2020-09-21 12:21:48,267 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 36) the Hoare annotation is: true [2020-09-21 12:21:48,267 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-09-21 12:21:48,267 INFO L268 CegarLoopResult]: For program point L27(lines 27 29) no Hoare annotation was computed. [2020-09-21 12:21:48,267 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 36) no Hoare annotation was computed. [2020-09-21 12:21:48,267 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 36) no Hoare annotation was computed. [2020-09-21 12:21:48,267 INFO L268 CegarLoopResult]: For program point L34(line 34) no Hoare annotation was computed. [2020-09-21 12:21:48,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 12:21:48 BoogieIcfgContainer [2020-09-21 12:21:48,279 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 12:21:48,284 INFO L168 Benchmark]: Toolchain (without parser) took 22325.43 ms. Allocated memory was 140.5 MB in the beginning and 363.3 MB in the end (delta: 222.8 MB). Free memory was 103.4 MB in the beginning and 119.1 MB in the end (delta: -15.7 MB). Peak memory consumption was 207.1 MB. Max. memory is 7.1 GB. [2020-09-21 12:21:48,285 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-21 12:21:48,287 INFO L168 Benchmark]: CACSL2BoogieTranslator took 413.79 ms. Allocated memory is still 140.5 MB. Free memory was 102.8 MB in the beginning and 93.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-21 12:21:48,294 INFO L168 Benchmark]: Boogie Preprocessor took 127.02 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 93.4 MB in the beginning and 181.0 MB in the end (delta: -87.7 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-09-21 12:21:48,298 INFO L168 Benchmark]: RCFGBuilder took 315.52 ms. Allocated memory is still 202.9 MB. Free memory was 181.0 MB in the beginning and 169.0 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. [2020-09-21 12:21:48,298 INFO L168 Benchmark]: TraceAbstraction took 21458.56 ms. Allocated memory was 202.9 MB in the beginning and 363.3 MB in the end (delta: 160.4 MB). Free memory was 169.0 MB in the beginning and 119.1 MB in the end (delta: 49.9 MB). Peak memory consumption was 210.4 MB. Max. memory is 7.1 GB. [2020-09-21 12:21:48,305 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 413.79 ms. Allocated memory is still 140.5 MB. Free memory was 102.8 MB in the beginning and 93.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 127.02 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 93.4 MB in the beginning and 181.0 MB in the end (delta: -87.7 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 315.52 ms. Allocated memory is still 202.9 MB. Free memory was 181.0 MB in the beginning and 169.0 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 21458.56 ms. Allocated memory was 202.9 MB in the beginning and 363.3 MB in the end (delta: 160.4 MB). Free memory was 169.0 MB in the beginning and 119.1 MB in the end (delta: 49.9 MB). Peak memory consumption was 210.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 34]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 20.8s, OverallIterations: 10, TraceHistogramMax: 9, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 181 SDtfs, 187 SDslu, 630 SDs, 0 SdLazy, 877 SolverSat, 170 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 261 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 77 PreInvPairs, 89 NumberOfFragments, 75 HoareAnnotationTreeSize, 77 FomulaSimplifications, 137 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 385 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 18.0s InterpolantComputationTime, 403 NumberOfCodeBlocks, 403 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 393 ConstructedInterpolants, 0 QuantifiedInterpolants, 49068 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 389/593 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...