/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/reducercommutativity/sep40-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 13:11:31,078 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 13:11:31,081 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 13:11:31,120 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 13:11:31,121 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 13:11:31,128 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 13:11:31,130 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 13:11:31,133 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 13:11:31,136 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 13:11:31,139 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 13:11:31,140 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 13:11:31,141 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 13:11:31,141 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 13:11:31,144 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 13:11:31,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 13:11:31,147 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 13:11:31,148 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 13:11:31,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 13:11:31,150 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 13:11:31,157 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 13:11:31,158 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 13:11:31,159 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 13:11:31,160 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 13:11:31,163 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 13:11:31,167 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 13:11:31,167 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 13:11:31,167 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 13:11:31,168 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 13:11:31,169 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 13:11:31,169 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 13:11:31,170 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 13:11:31,175 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 13:11:31,176 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 13:11:31,177 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 13:11:31,177 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 13:11:31,178 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 13:11:31,178 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 13:11:31,178 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 13:11:31,179 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 13:11:31,179 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 13:11:31,181 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 13:11:31,181 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 13:11:31,220 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 13:11:31,221 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 13:11:31,223 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 13:11:31,223 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 13:11:31,223 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 13:11:31,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 13:11:31,223 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 13:11:31,224 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 13:11:31,224 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 13:11:31,224 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 13:11:31,225 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 13:11:31,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 13:11:31,225 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 13:11:31,226 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 13:11:31,226 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 13:11:31,226 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 13:11:31,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 13:11:31,227 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 13:11:31,227 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 13:11:31,227 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 13:11:31,227 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 13:11:31,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 13:11:31,228 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 13:11:31,228 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 13:11:31,228 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 13:11:31,228 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 13:11:31,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 13:11:31,228 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 13:11:31,229 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 13:11:31,229 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 13:11:31,546 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 13:11:31,563 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 13:11:31,566 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 13:11:31,568 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 13:11:31,568 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 13:11:31,569 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep40-1.i [2020-10-13 13:11:31,626 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b69aa7eaa/3b894c6c13bc4539a084a96ab16a192a/FLAG8fa5e51f5 [2020-10-13 13:11:32,058 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 13:11:32,058 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/reducercommutativity/sep40-1.i [2020-10-13 13:11:32,064 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b69aa7eaa/3b894c6c13bc4539a084a96ab16a192a/FLAG8fa5e51f5 [2020-10-13 13:11:32,437 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b69aa7eaa/3b894c6c13bc4539a084a96ab16a192a [2020-10-13 13:11:32,445 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 13:11:32,447 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 13:11:32,448 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 13:11:32,448 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 13:11:32,452 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 13:11:32,453 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:11:32" (1/1) ... [2020-10-13 13:11:32,455 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ccc0ea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:11:32, skipping insertion in model container [2020-10-13 13:11:32,456 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:11:32" (1/1) ... [2020-10-13 13:11:32,463 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 13:11:32,484 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 13:11:32,719 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 13:11:32,727 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 13:11:32,749 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 13:11:32,762 INFO L208 MainTranslator]: Completed translation [2020-10-13 13:11:32,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:11:32 WrapperNode [2020-10-13 13:11:32,763 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 13:11:32,763 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 13:11:32,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 13:11:32,763 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 13:11:32,853 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:11:32" (1/1) ... [2020-10-13 13:11:32,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:11:32" (1/1) ... [2020-10-13 13:11:32,864 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:11:32" (1/1) ... [2020-10-13 13:11:32,865 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:11:32" (1/1) ... [2020-10-13 13:11:32,876 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:11:32" (1/1) ... [2020-10-13 13:11:32,881 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:11:32" (1/1) ... [2020-10-13 13:11:32,883 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:11:32" (1/1) ... [2020-10-13 13:11:32,885 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 13:11:32,886 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 13:11:32,886 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 13:11:32,886 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 13:11:32,887 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:11:32" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 13:11:32,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 13:11:32,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 13:11:32,952 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2020-10-13 13:11:32,952 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 13:11:32,952 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 13:11:32,952 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 13:11:32,952 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2020-10-13 13:11:32,953 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 13:11:32,953 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 13:11:32,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 13:11:32,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 13:11:32,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 13:11:32,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 13:11:32,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 13:11:33,270 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 13:11:33,270 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 13:11:33,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:11:33 BoogieIcfgContainer [2020-10-13 13:11:33,274 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 13:11:33,275 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 13:11:33,275 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 13:11:33,278 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 13:11:33,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 01:11:32" (1/3) ... [2020-10-13 13:11:33,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@173f8b2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:11:33, skipping insertion in model container [2020-10-13 13:11:33,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:11:32" (2/3) ... [2020-10-13 13:11:33,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@173f8b2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:11:33, skipping insertion in model container [2020-10-13 13:11:33,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:11:33" (3/3) ... [2020-10-13 13:11:33,282 INFO L109 eAbstractionObserver]: Analyzing ICFG sep40-1.i [2020-10-13 13:11:33,292 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 13:11:33,298 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 13:11:33,311 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 13:11:33,334 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 13:11:33,335 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 13:11:33,335 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 13:11:33,335 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 13:11:33,335 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 13:11:33,335 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 13:11:33,336 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 13:11:33,336 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 13:11:33,352 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-13 13:11:33,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 13:11:33,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:11:33,359 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:11:33,359 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:11:33,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:11:33,364 INFO L82 PathProgramCache]: Analyzing trace with hash 794343521, now seen corresponding path program 1 times [2020-10-13 13:11:33,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:11:33,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249791621] [2020-10-13 13:11:33,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:11:33,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:33,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:33,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:33,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:33,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:33,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:33,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:34,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:34,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 13:11:34,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 13:11:34,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1136 [2020-10-13 13:11:34,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:34,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:34,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 13:11:34,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:34,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 13:11:34,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:11:34,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:34,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:34,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:34,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:11:34,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:11:34,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 13:11:34,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:34,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:34,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:11:34,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:34,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:11:34,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 13:11:34,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:34,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:34,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:34,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:34,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 13:11:34,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:11:34,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 13:11:34,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:34,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:34,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 13:11:34,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:34,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:11:34,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-13 13:11:34,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:34,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:34,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:34,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:34,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 13:11:34,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:11:34,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 13:11:34,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:34,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:34,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-13 13:11:34,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:34,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:11:34,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-13 13:11:34,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:34,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:34,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:34,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:34,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 13:11:34,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:11:34,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 13:11:34,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:34,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:34,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 13:11:34,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:34,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:11:34,767 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 13:11:34,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249791621] [2020-10-13 13:11:34,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:11:34,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-10-13 13:11:34,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465624951] [2020-10-13 13:11:34,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 13:11:34,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:11:34,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 13:11:34,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 13:11:34,795 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-10-13 13:11:34,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:11:34,881 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2020-10-13 13:11:34,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 13:11:34,883 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2020-10-13 13:11:34,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:11:34,892 INFO L225 Difference]: With dead ends: 56 [2020-10-13 13:11:34,892 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 13:11:34,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 13:11:34,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 13:11:34,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-13 13:11:34,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 13:11:34,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-10-13 13:11:34,939 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 32 [2020-10-13 13:11:34,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:11:34,939 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-10-13 13:11:34,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 13:11:34,940 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-10-13 13:11:34,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 13:11:34,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:11:34,942 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:11:34,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 13:11:34,943 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:11:34,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:11:34,943 INFO L82 PathProgramCache]: Analyzing trace with hash 2140793590, now seen corresponding path program 1 times [2020-10-13 13:11:34,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:11:34,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628004344] [2020-10-13 13:11:34,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:11:34,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:34,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:34,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:34,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:34,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:35,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:35,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:36,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:36,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 13:11:36,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 13:11:36,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1158 [2020-10-13 13:11:36,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:36,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:11:36,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 13:11:36,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 13:11:36,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:11:36,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:11:36,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:36,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:36,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:36,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:11:36,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:11:36,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 13:11:36,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:36,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:36,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:11:36,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:36,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:11:36,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 13:11:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:36,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:36,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:36,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:36,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 13:11:36,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:11:36,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 13:11:36,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:36,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:36,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:11:36,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:36,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:11:36,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-13 13:11:36,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:36,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:36,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:36,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 13:11:36,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:11:36,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 13:11:36,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:36,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:11:36,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 13:11:36,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 13:11:36,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:11:36,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-13 13:11:36,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:36,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:36,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:36,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:36,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 13:11:36,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:11:36,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 13:11:36,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:36,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:36,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-13 13:11:36,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:36,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:11:36,221 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 13:11:36,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628004344] [2020-10-13 13:11:36,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:11:36,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 13:11:36,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634953310] [2020-10-13 13:11:36,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:11:36,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:11:36,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:11:36,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:11:36,228 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 4 states. [2020-10-13 13:11:36,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:11:36,340 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2020-10-13 13:11:36,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 13:11:36,340 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-13 13:11:36,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:11:36,342 INFO L225 Difference]: With dead ends: 48 [2020-10-13 13:11:36,342 INFO L226 Difference]: Without dead ends: 30 [2020-10-13 13:11:36,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:11:36,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-13 13:11:36,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-10-13 13:11:36,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 13:11:36,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-10-13 13:11:36,357 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 32 [2020-10-13 13:11:36,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:11:36,357 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-10-13 13:11:36,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:11:36,358 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-10-13 13:11:36,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 13:11:36,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:11:36,360 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:11:36,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 13:11:36,360 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:11:36,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:11:36,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1533486879, now seen corresponding path program 1 times [2020-10-13 13:11:36,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:11:36,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062490668] [2020-10-13 13:11:36,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:11:36,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:36,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:36,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:36,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:36,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:36,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:38,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:41,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:41,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 13:11:41,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 13:11:41,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 13:11:41,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:41,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:11:41,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 13:11:41,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 13:11:41,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:11:41,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:11:41,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:41,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:41,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:41,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:11:41,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:11:41,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:11:41,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:41,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:41,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:11:41,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:41,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:11:41,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 13:11:41,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:41,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:41,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:41,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:41,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-13 13:11:41,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:11:41,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-13 13:11:41,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:41,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:41,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:11:41,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:41,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:11:41,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 13:11:41,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:41,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:41,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:41,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:41,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-13 13:11:41,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:11:41,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-13 13:11:41,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:41,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:41,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:11:41,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:41,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:11:41,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-13 13:11:41,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:41,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:41,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:41,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:41,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-13 13:11:41,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:11:41,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-13 13:11:41,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:41,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:41,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 13:11:41,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:41,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:11:41,523 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-13 13:11:41,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062490668] [2020-10-13 13:11:41,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:11:41,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:11:41,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302384953] [2020-10-13 13:11:41,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:11:41,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:11:41,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:11:41,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:11:41,527 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 4 states. [2020-10-13 13:11:41,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:11:41,610 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2020-10-13 13:11:41,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 13:11:41,611 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-10-13 13:11:41,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:11:41,612 INFO L225 Difference]: With dead ends: 44 [2020-10-13 13:11:41,612 INFO L226 Difference]: Without dead ends: 30 [2020-10-13 13:11:41,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:11:41,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-13 13:11:41,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-13 13:11:41,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 13:11:41,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-10-13 13:11:41,625 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 41 [2020-10-13 13:11:41,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:11:41,627 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-10-13 13:11:41,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:11:41,628 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-10-13 13:11:41,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 13:11:41,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:11:41,632 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:11:41,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 13:11:41,632 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:11:41,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:11:41,633 INFO L82 PathProgramCache]: Analyzing trace with hash 502203169, now seen corresponding path program 1 times [2020-10-13 13:11:41,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:11:41,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138036903] [2020-10-13 13:11:41,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:11:41,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:41,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:41,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:41,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:41,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:42,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:44,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:46,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:46,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 13:11:46,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 13:11:46,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 13:11:46,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:46,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:11:46,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:11:46,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 13:11:46,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:11:46,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:11:46,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:46,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:46,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:46,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:11:46,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:11:46,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:11:46,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:46,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:46,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:11:46,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:46,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:11:46,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 13:11:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:46,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:46,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:46,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:46,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-13 13:11:46,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:11:46,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-13 13:11:46,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:46,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:46,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 13:11:46,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:46,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 13:11:46,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 13:11:46,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:46,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:46,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:46,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:46,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-13 13:11:46,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:11:46,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-13 13:11:46,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:46,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:46,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 13:11:46,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:46,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:11:46,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 13:11:46,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:46,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:46,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:46,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:46,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-13 13:11:46,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:11:46,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-13 13:11:46,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:46,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:46,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 13:11:46,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:46,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:11:46,790 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-13 13:11:46,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138036903] [2020-10-13 13:11:46,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:11:46,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:11:46,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529126573] [2020-10-13 13:11:46,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:11:46,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:11:46,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:11:46,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:11:46,794 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 4 states. [2020-10-13 13:11:46,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:11:46,877 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2020-10-13 13:11:46,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 13:11:46,877 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2020-10-13 13:11:46,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:11:46,878 INFO L225 Difference]: With dead ends: 52 [2020-10-13 13:11:46,879 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 13:11:46,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:11:46,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 13:11:46,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-13 13:11:46,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 13:11:46,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-10-13 13:11:46,891 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 43 [2020-10-13 13:11:46,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:11:46,891 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-10-13 13:11:46,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:11:46,891 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-10-13 13:11:46,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 13:11:46,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:11:46,893 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:11:46,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 13:11:46,894 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:11:46,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:11:46,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1550635457, now seen corresponding path program 1 times [2020-10-13 13:11:46,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:11:46,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481394042] [2020-10-13 13:11:46,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:11:46,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:46,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:46,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:46,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:46,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:47,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:50,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:51,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:51,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 13:11:51,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 13:11:51,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 13:11:51,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:51,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:11:51,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:11:51,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 13:11:51,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:11:51,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:11:51,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:51,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:51,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:51,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:11:51,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:11:51,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:11:51,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:51,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:51,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:11:51,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:51,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:11:51,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-13 13:11:51,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:51,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:51,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:51,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:51,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-13 13:11:51,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:11:51,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-13 13:11:51,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:51,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:51,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 13:11:51,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:51,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:11:51,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-13 13:11:51,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:51,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:51,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:52,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:52,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-13 13:11:52,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:11:52,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-13 13:11:52,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:52,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:52,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 13:11:52,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:52,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:11:52,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-13 13:11:52,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:52,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:52,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:52,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:52,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-13 13:11:52,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:11:52,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-13 13:11:52,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:52,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:52,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 13:11:52,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:52,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:11:52,037 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-13 13:11:52,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481394042] [2020-10-13 13:11:52,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:11:52,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 13:11:52,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449222866] [2020-10-13 13:11:52,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:11:52,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:11:52,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:11:52,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:11:52,039 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2020-10-13 13:11:52,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:11:52,121 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2020-10-13 13:11:52,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:11:52,122 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2020-10-13 13:11:52,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:11:52,123 INFO L225 Difference]: With dead ends: 54 [2020-10-13 13:11:52,123 INFO L226 Difference]: Without dead ends: 33 [2020-10-13 13:11:52,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:11:52,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-13 13:11:52,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-13 13:11:52,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 13:11:52,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-10-13 13:11:52,130 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 45 [2020-10-13 13:11:52,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:11:52,130 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-10-13 13:11:52,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:11:52,131 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-10-13 13:11:52,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 13:11:52,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:11:52,132 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:11:52,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 13:11:52,132 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:11:52,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:11:52,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1356401117, now seen corresponding path program 2 times [2020-10-13 13:11:52,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:11:52,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760971378] [2020-10-13 13:11:52,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:11:52,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:52,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:52,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:52,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:52,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:52,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:56,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:57,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:57,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 13:11:57,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 13:11:57,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 13:11:57,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:57,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:11:57,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-13 13:11:57,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 13:11:57,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:11:57,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:11:57,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:57,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:57,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:57,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:11:57,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:11:57,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:11:57,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:57,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:57,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:11:57,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:57,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:11:57,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 13:11:57,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:57,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:57,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:57,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:57,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-13 13:11:57,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:11:57,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-13 13:11:57,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:57,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:57,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:11:57,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:57,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:11:57,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-13 13:11:57,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:57,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:57,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:57,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:57,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-13 13:11:57,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:11:57,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-13 13:11:57,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:57,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:57,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:11:57,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:57,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:11:57,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-13 13:11:57,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:57,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:57,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:57,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:11:57,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-13 13:11:57,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:11:57,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-13 13:11:57,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:11:57,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:11:57,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 13:11:57,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:11:57,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:11:57,282 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-13 13:11:57,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760971378] [2020-10-13 13:11:57,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:11:57,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 13:11:57,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469736545] [2020-10-13 13:11:57,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:11:57,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:11:57,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:11:57,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:11:57,287 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 5 states. [2020-10-13 13:11:57,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:11:57,375 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-10-13 13:11:57,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:11:57,376 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-10-13 13:11:57,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:11:57,377 INFO L225 Difference]: With dead ends: 49 [2020-10-13 13:11:57,377 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 13:11:57,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:11:57,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 13:11:57,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-13 13:11:57,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 13:11:57,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-10-13 13:11:57,389 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 47 [2020-10-13 13:11:57,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:11:57,389 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-10-13 13:11:57,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:11:57,389 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-10-13 13:11:57,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 13:11:57,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:11:57,392 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:11:57,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 13:11:57,392 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:11:57,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:11:57,392 INFO L82 PathProgramCache]: Analyzing trace with hash 2121477727, now seen corresponding path program 3 times [2020-10-13 13:11:57,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:11:57,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046520242] [2020-10-13 13:11:57,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:11:57,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:11:57,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:57,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:57,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:57,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:11:57,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:02,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:02,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 13:12:02,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:12:02,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 13:12:02,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:02,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:12:02,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-13 13:12:02,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 13:12:02,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:02,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:12:02,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:02,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:02,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:02,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:12:02,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:12:02,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 13:12:02,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:02,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:02,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:12:02,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:02,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:02,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 13:12:02,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:02,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:02,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:02,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:02,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-13 13:12:02,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:02,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 13:12:02,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:02,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:02,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:12:02,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:02,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:02,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-13 13:12:02,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:02,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:02,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:02,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:02,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-13 13:12:02,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:02,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 13:12:02,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:02,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:02,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:12:02,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:02,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:02,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-13 13:12:02,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:02,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:02,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:02,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-13 13:12:02,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:12:02,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 13:12:02,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:02,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:12:02,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 13:12:02,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 13:12:02,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:02,509 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 13:12:02,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046520242] [2020-10-13 13:12:02,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:12:02,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 13:12:02,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98070149] [2020-10-13 13:12:02,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:12:02,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:12:02,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:12:02,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:12:02,512 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 5 states. [2020-10-13 13:12:02,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:12:02,631 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2020-10-13 13:12:02,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:12:02,631 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 49 [2020-10-13 13:12:02,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:12:02,632 INFO L225 Difference]: With dead ends: 61 [2020-10-13 13:12:02,632 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 13:12:02,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-13 13:12:02,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 13:12:02,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-10-13 13:12:02,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 13:12:02,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-10-13 13:12:02,643 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 49 [2020-10-13 13:12:02,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:12:02,643 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-10-13 13:12:02,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:12:02,643 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-10-13 13:12:02,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 13:12:02,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:12:02,645 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:12:02,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 13:12:02,646 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:12:02,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:12:02,646 INFO L82 PathProgramCache]: Analyzing trace with hash 506038742, now seen corresponding path program 4 times [2020-10-13 13:12:02,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:12:02,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502411431] [2020-10-13 13:12:02,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:12:02,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:02,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:02,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:02,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:02,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:07,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:07,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:07,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:07,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 13:12:07,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 13:12:07,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 13:12:07,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:07,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 13:12:07,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:12:07,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 13:12:07,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:07,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:12:07,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:07,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:07,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:07,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:12:07,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:12:07,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 13:12:07,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:07,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:07,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:12:07,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:07,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:07,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 13:12:07,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:07,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:07,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:07,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:07,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 13:12:07,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:07,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-13 13:12:07,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:07,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:07,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 13:12:07,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:07,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:07,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-13 13:12:07,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:07,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:07,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:07,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:07,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 13:12:07,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:07,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-13 13:12:07,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:07,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:07,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 13:12:07,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:07,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:07,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-13 13:12:07,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:07,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:07,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:07,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:07,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 13:12:07,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:07,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-13 13:12:07,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:07,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:07,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 13:12:07,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:07,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:07,818 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-10-13 13:12:07,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502411431] [2020-10-13 13:12:07,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:12:07,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 13:12:07,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257493295] [2020-10-13 13:12:07,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 13:12:07,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:12:07,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 13:12:07,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:12:07,821 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 6 states. [2020-10-13 13:12:07,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:12:07,900 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2020-10-13 13:12:07,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 13:12:07,900 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-13 13:12:07,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:12:07,901 INFO L225 Difference]: With dead ends: 66 [2020-10-13 13:12:07,901 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 13:12:07,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:12:07,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 13:12:07,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-13 13:12:07,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 13:12:07,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-10-13 13:12:07,908 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 58 [2020-10-13 13:12:07,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:12:07,908 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-10-13 13:12:07,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 13:12:07,908 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-10-13 13:12:07,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 13:12:07,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:12:07,910 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:12:07,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 13:12:07,910 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:12:07,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:12:07,910 INFO L82 PathProgramCache]: Analyzing trace with hash 190971640, now seen corresponding path program 5 times [2020-10-13 13:12:07,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:12:07,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695089899] [2020-10-13 13:12:07,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:12:07,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:07,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:07,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:07,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:07,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:12,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:12,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:12,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:12,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 13:12:12,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 13:12:12,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 13:12:12,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:12,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 13:12:12,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-13 13:12:12,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 13:12:12,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:12,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:12:12,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:12,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:12,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:12,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:12:12,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:12:12,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:12:12,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:12,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:12,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:12:12,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:12,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:12,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-13 13:12:12,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:12,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:12,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:13,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:13,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 13:12:13,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:13,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-13 13:12:13,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:13,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:13,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:12:13,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:13,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:13,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-13 13:12:13,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:13,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:13,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:13,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:13,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 13:12:13,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:13,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-13 13:12:13,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:13,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:13,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:12:13,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:13,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:13,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-13 13:12:13,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:13,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:13,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:13,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:13,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 13:12:13,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:13,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-13 13:12:13,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:13,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:13,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 13:12:13,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:13,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:13,075 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-10-13 13:12:13,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695089899] [2020-10-13 13:12:13,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:12:13,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 13:12:13,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972062954] [2020-10-13 13:12:13,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 13:12:13,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:12:13,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 13:12:13,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:12:13,082 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 6 states. [2020-10-13 13:12:13,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:12:13,161 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2020-10-13 13:12:13,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 13:12:13,161 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-10-13 13:12:13,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:12:13,162 INFO L225 Difference]: With dead ends: 59 [2020-10-13 13:12:13,162 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 13:12:13,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:12:13,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 13:12:13,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-13 13:12:13,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 13:12:13,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-10-13 13:12:13,168 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 60 [2020-10-13 13:12:13,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:12:13,169 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-10-13 13:12:13,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 13:12:13,169 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-10-13 13:12:13,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 13:12:13,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:12:13,170 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:12:13,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 13:12:13,170 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:12:13,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:12:13,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1075396278, now seen corresponding path program 6 times [2020-10-13 13:12:13,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:12:13,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899395428] [2020-10-13 13:12:13,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:12:13,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:13,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:13,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:13,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:13,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:18,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:18,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 13:12:18,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:12:18,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 13:12:18,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:18,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 13:12:18,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:12:18,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 13:12:18,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:18,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:12:18,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:18,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:18,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:18,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:12:18,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:12:18,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:12:18,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:18,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:18,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:12:18,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:18,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:18,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-13 13:12:18,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:18,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:18,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:18,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:18,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 13:12:18,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:18,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-13 13:12:18,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:18,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:18,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 13:12:18,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:18,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:18,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-13 13:12:18,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:18,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:18,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:18,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:18,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 13:12:18,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:18,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-13 13:12:18,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:18,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:18,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 13:12:18,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:18,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:18,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-13 13:12:18,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:18,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:18,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:18,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:18,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 13:12:18,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:18,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-13 13:12:18,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:18,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:18,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 13:12:18,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:18,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:18,328 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-10-13 13:12:18,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899395428] [2020-10-13 13:12:18,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:12:18,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 13:12:18,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647634864] [2020-10-13 13:12:18,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 13:12:18,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:12:18,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 13:12:18,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 13:12:18,330 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 7 states. [2020-10-13 13:12:18,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:12:18,413 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2020-10-13 13:12:18,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 13:12:18,413 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 62 [2020-10-13 13:12:18,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:12:18,414 INFO L225 Difference]: With dead ends: 72 [2020-10-13 13:12:18,414 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 13:12:18,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 13:12:18,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 13:12:18,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-13 13:12:18,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 13:12:18,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-10-13 13:12:18,420 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 62 [2020-10-13 13:12:18,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:12:18,420 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-10-13 13:12:18,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 13:12:18,420 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-10-13 13:12:18,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 13:12:18,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:12:18,421 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:12:18,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 13:12:18,422 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:12:18,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:12:18,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1139692248, now seen corresponding path program 7 times [2020-10-13 13:12:18,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:12:18,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976593404] [2020-10-13 13:12:18,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:12:18,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:18,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:18,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:18,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:18,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:23,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:23,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 13:12:23,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:12:23,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 13:12:23,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:23,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 13:12:23,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-13 13:12:23,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 13:12:23,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:23,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:12:23,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:23,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:23,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:23,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:12:23,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:12:23,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:12:23,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:23,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:23,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:12:23,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:23,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:23,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-13 13:12:23,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:23,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:23,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:23,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:23,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 13:12:23,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:23,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 13:12:23,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:23,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:23,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:12:23,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:23,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:23,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 13:12:23,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:23,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:23,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:23,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:23,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 13:12:23,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:23,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-13 13:12:23,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:23,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:23,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:12:23,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:23,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:23,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-13 13:12:23,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:23,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:23,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:23,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:23,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 13:12:23,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:23,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-13 13:12:23,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:23,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:23,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 13:12:23,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:23,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:23,546 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-10-13 13:12:23,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976593404] [2020-10-13 13:12:23,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:12:23,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 13:12:23,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779529887] [2020-10-13 13:12:23,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 13:12:23,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:12:23,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 13:12:23,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 13:12:23,548 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 7 states. [2020-10-13 13:12:23,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:12:23,629 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2020-10-13 13:12:23,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 13:12:23,629 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-10-13 13:12:23,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:12:23,630 INFO L225 Difference]: With dead ends: 63 [2020-10-13 13:12:23,630 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 13:12:23,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 13:12:23,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 13:12:23,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-13 13:12:23,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 13:12:23,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2020-10-13 13:12:23,636 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 64 [2020-10-13 13:12:23,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:12:23,636 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2020-10-13 13:12:23,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 13:12:23,636 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2020-10-13 13:12:23,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 13:12:23,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:12:23,637 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:12:23,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 13:12:23,638 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:12:23,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:12:23,638 INFO L82 PathProgramCache]: Analyzing trace with hash -2032133482, now seen corresponding path program 8 times [2020-10-13 13:12:23,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:12:23,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491638505] [2020-10-13 13:12:23,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:12:23,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:23,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:23,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:23,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:23,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:28,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:28,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 13:12:28,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:12:28,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 13:12:28,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:28,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 13:12:28,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 13:12:28,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 13:12:28,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:28,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:12:28,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:28,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:28,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:28,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:12:28,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:12:28,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:12:28,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:28,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:28,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:12:28,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:28,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:28,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-13 13:12:28,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:28,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:28,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:28,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 13:12:28,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:12:28,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-13 13:12:28,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:28,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 13:12:28,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 13:12:28,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 13:12:28,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:28,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 13:12:28,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:28,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:28,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:28,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:28,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 13:12:28,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:28,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-13 13:12:28,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:28,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:28,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 13:12:28,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:28,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:28,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-13 13:12:28,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:28,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:28,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:28,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:28,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 13:12:28,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:28,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-13 13:12:28,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:28,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:28,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 13:12:28,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:28,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:28,769 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2020-10-13 13:12:28,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491638505] [2020-10-13 13:12:28,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:12:28,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 13:12:28,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700693855] [2020-10-13 13:12:28,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 13:12:28,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:12:28,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 13:12:28,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:12:28,771 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand 6 states. [2020-10-13 13:12:28,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:12:28,880 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2020-10-13 13:12:28,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 13:12:28,881 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-13 13:12:28,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:12:28,881 INFO L225 Difference]: With dead ends: 79 [2020-10-13 13:12:28,882 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 13:12:28,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 13:12:28,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 13:12:28,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-10-13 13:12:28,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 13:12:28,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-10-13 13:12:28,892 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 66 [2020-10-13 13:12:28,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:12:28,892 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-10-13 13:12:28,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 13:12:28,892 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-10-13 13:12:28,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 13:12:28,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:12:28,893 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:12:28,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 13:12:28,894 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:12:28,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:12:28,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1988504449, now seen corresponding path program 9 times [2020-10-13 13:12:28,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:12:28,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593664223] [2020-10-13 13:12:28,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:12:28,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:28,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:28,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:28,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:29,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:33,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:33,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 13:12:33,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:12:33,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 13:12:33,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:33,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 13:12:33,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:12:33,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 13:12:33,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:33,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:12:33,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:33,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:33,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:33,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:12:33,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:12:33,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:12:33,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:33,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:33,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:12:33,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:33,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:33,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-13 13:12:33,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:33,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:33,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:34,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:34,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 13:12:34,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:34,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-13 13:12:34,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:34,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:34,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 13:12:34,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:34,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:34,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 13:12:34,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:34,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:34,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:34,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:34,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 13:12:34,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:34,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-13 13:12:34,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:34,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:34,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 13:12:34,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:34,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:34,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-13 13:12:34,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:34,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:34,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:34,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:34,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 13:12:34,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:34,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-13 13:12:34,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:34,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:34,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 13:12:34,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:34,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:34,118 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2020-10-13 13:12:34,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593664223] [2020-10-13 13:12:34,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:12:34,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 13:12:34,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542912481] [2020-10-13 13:12:34,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 13:12:34,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:12:34,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 13:12:34,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 13:12:34,120 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 8 states. [2020-10-13 13:12:34,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:12:34,217 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2020-10-13 13:12:34,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 13:12:34,218 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 75 [2020-10-13 13:12:34,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:12:34,219 INFO L225 Difference]: With dead ends: 84 [2020-10-13 13:12:34,219 INFO L226 Difference]: Without dead ends: 51 [2020-10-13 13:12:34,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 13:12:34,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-13 13:12:34,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-13 13:12:34,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-13 13:12:34,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2020-10-13 13:12:34,225 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 75 [2020-10-13 13:12:34,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:12:34,226 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2020-10-13 13:12:34,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 13:12:34,226 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2020-10-13 13:12:34,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 13:12:34,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:12:34,227 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:12:34,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 13:12:34,227 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:12:34,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:12:34,228 INFO L82 PathProgramCache]: Analyzing trace with hash 2063206301, now seen corresponding path program 10 times [2020-10-13 13:12:34,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:12:34,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285997880] [2020-10-13 13:12:34,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:12:34,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:34,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:34,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:34,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:34,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:39,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:39,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 13:12:39,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:12:39,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 13:12:39,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:39,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 13:12:39,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-13 13:12:39,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 13:12:39,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:39,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:12:39,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:39,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:39,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:39,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:12:39,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:12:39,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:12:39,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:39,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:39,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:12:39,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:39,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:39,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 13:12:39,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:39,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:39,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:39,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:39,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 13:12:39,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:39,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-13 13:12:39,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:39,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:39,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:12:39,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:39,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:39,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-13 13:12:39,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:39,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:39,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:39,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:39,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 13:12:39,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:39,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-13 13:12:39,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:39,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:39,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:12:39,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:39,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:39,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-13 13:12:39,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:39,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:39,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:39,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:39,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 13:12:39,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:39,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-13 13:12:39,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:39,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:39,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 13:12:39,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:39,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:39,398 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-10-13 13:12:39,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285997880] [2020-10-13 13:12:39,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:12:39,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 13:12:39,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691628310] [2020-10-13 13:12:39,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 13:12:39,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:12:39,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 13:12:39,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 13:12:39,400 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 8 states. [2020-10-13 13:12:39,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:12:39,499 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2020-10-13 13:12:39,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 13:12:39,500 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 77 [2020-10-13 13:12:39,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:12:39,501 INFO L225 Difference]: With dead ends: 73 [2020-10-13 13:12:39,501 INFO L226 Difference]: Without dead ends: 53 [2020-10-13 13:12:39,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 13:12:39,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-13 13:12:39,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-13 13:12:39,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 13:12:39,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-10-13 13:12:39,508 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 77 [2020-10-13 13:12:39,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:12:39,508 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-10-13 13:12:39,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 13:12:39,508 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-10-13 13:12:39,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 13:12:39,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:12:39,509 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:12:39,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 13:12:39,509 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:12:39,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:12:39,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1778264735, now seen corresponding path program 11 times [2020-10-13 13:12:39,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:12:39,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607595659] [2020-10-13 13:12:39,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:12:39,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:39,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:39,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:39,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:39,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:44,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:44,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 13:12:44,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:12:44,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 13:12:44,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:44,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 13:12:44,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 13:12:44,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 13:12:44,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:44,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:12:44,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:44,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:44,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:44,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:12:44,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:12:44,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:12:44,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:44,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:44,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:12:44,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:44,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:44,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 13:12:44,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:44,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:44,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:44,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:44,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 13:12:44,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:44,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-13 13:12:44,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:44,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:44,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:12:44,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:44,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:12:44,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-13 13:12:44,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:44,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:44,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:44,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 13:12:44,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:12:44,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-13 13:12:44,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:44,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 13:12:44,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 13:12:44,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 13:12:44,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:12:44,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-13 13:12:44,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:44,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:44,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:44,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:44,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 13:12:44,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:44,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-13 13:12:44,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:44,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:44,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 13:12:44,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:44,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:44,768 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 37 proven. 49 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-10-13 13:12:44,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607595659] [2020-10-13 13:12:44,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:12:44,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 13:12:44,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058458395] [2020-10-13 13:12:44,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 13:12:44,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:12:44,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 13:12:44,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 13:12:44,771 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 7 states. [2020-10-13 13:12:44,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:12:44,958 INFO L93 Difference]: Finished difference Result 91 states and 109 transitions. [2020-10-13 13:12:44,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 13:12:44,959 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 79 [2020-10-13 13:12:44,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:12:44,960 INFO L225 Difference]: With dead ends: 91 [2020-10-13 13:12:44,960 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 13:12:44,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-13 13:12:44,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 13:12:44,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2020-10-13 13:12:44,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 13:12:44,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2020-10-13 13:12:44,980 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 79 [2020-10-13 13:12:44,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:12:44,981 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2020-10-13 13:12:44,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 13:12:44,981 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2020-10-13 13:12:44,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 13:12:44,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:12:44,982 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:12:44,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 13:12:44,984 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:12:44,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:12:44,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1712281450, now seen corresponding path program 12 times [2020-10-13 13:12:44,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:12:44,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461840239] [2020-10-13 13:12:44,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:12:44,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:45,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:45,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:45,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:45,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:50,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:50,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 13:12:50,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:12:50,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 13:12:50,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:50,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 13:12:50,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:12:50,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 13:12:50,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:50,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:12:50,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:50,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:50,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:50,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:12:50,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:12:50,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:12:50,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:50,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:50,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:12:50,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:50,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:50,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 13:12:50,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:50,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:50,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:50,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:50,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 13:12:50,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:50,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-13 13:12:50,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:50,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:50,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 13:12:50,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:50,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:50,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 13:12:50,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:50,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:50,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:50,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:50,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 13:12:50,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:50,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-13 13:12:50,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:50,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:50,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 13:12:50,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:50,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:50,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-13 13:12:50,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:50,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:50,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:50,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:50,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 13:12:50,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:50,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-13 13:12:50,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:50,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:50,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 13:12:50,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:50,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:50,263 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2020-10-13 13:12:50,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461840239] [2020-10-13 13:12:50,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:12:50,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 13:12:50,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45122652] [2020-10-13 13:12:50,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 13:12:50,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:12:50,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 13:12:50,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 13:12:50,271 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 9 states. [2020-10-13 13:12:50,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:12:50,389 INFO L93 Difference]: Finished difference Result 96 states and 112 transitions. [2020-10-13 13:12:50,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 13:12:50,389 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 88 [2020-10-13 13:12:50,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:12:50,390 INFO L225 Difference]: With dead ends: 96 [2020-10-13 13:12:50,390 INFO L226 Difference]: Without dead ends: 58 [2020-10-13 13:12:50,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 13:12:50,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-13 13:12:50,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-13 13:12:50,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 13:12:50,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2020-10-13 13:12:50,406 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 88 [2020-10-13 13:12:50,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:12:50,406 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2020-10-13 13:12:50,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 13:12:50,407 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2020-10-13 13:12:50,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 13:12:50,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:12:50,408 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 6, 6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:12:50,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 13:12:50,408 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:12:50,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:12:50,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1080494536, now seen corresponding path program 13 times [2020-10-13 13:12:50,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:12:50,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071795738] [2020-10-13 13:12:50,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:12:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:50,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:50,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:50,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:50,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:55,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:55,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 13:12:55,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:12:55,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 13:12:55,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:55,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 13:12:55,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-13 13:12:55,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 13:12:55,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:55,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:12:55,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:55,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:55,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:55,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:12:55,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:12:55,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:12:55,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:55,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:55,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:12:55,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:55,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:55,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-13 13:12:55,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:55,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:55,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:55,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:55,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 13:12:55,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:55,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-13 13:12:55,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:55,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:55,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:12:55,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:55,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:55,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-13 13:12:55,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:55,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:55,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:55,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:55,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 13:12:55,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:55,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-13 13:12:55,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:55,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:55,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:12:55,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:55,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:55,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-13 13:12:55,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:55,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:55,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:55,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:12:55,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 13:12:55,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:12:55,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-13 13:12:55,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:12:55,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:12:55,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 13:12:55,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:12:55,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:12:55,672 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2020-10-13 13:12:55,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071795738] [2020-10-13 13:12:55,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:12:55,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 13:12:55,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127294350] [2020-10-13 13:12:55,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 13:12:55,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:12:55,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 13:12:55,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 13:12:55,674 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 9 states. [2020-10-13 13:12:55,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:12:55,788 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2020-10-13 13:12:55,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 13:12:55,788 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 90 [2020-10-13 13:12:55,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:12:55,789 INFO L225 Difference]: With dead ends: 83 [2020-10-13 13:12:55,789 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 13:12:55,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 13:12:55,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 13:12:55,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-13 13:12:55,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 13:12:55,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2020-10-13 13:12:55,799 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 90 [2020-10-13 13:12:55,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:12:55,799 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2020-10-13 13:12:55,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 13:12:55,800 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2020-10-13 13:12:55,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 13:12:55,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:12:55,804 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:12:55,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 13:12:55,805 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:12:55,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:12:55,806 INFO L82 PathProgramCache]: Analyzing trace with hash -105355402, now seen corresponding path program 14 times [2020-10-13 13:12:55,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:12:55,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480679724] [2020-10-13 13:12:55,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:12:55,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:12:55,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:55,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:55,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:12:55,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:00,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:00,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 13:13:00,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:13:00,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 13:13:00,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:00,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 13:13:00,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 13:13:00,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 13:13:00,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:00,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:13:00,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:00,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:00,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:00,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:13:00,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:13:00,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:13:00,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:00,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:00,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:13:00,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:00,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:00,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-13 13:13:00,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:00,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:00,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:00,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:00,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 13:13:00,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:13:00,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-13 13:13:00,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:00,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:00,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:13:00,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:00,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:00,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-13 13:13:00,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:00,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:00,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:00,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 13:13:00,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:13:00,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-13 13:13:00,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:00,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 13:13:00,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 13:13:00,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 13:13:00,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:00,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-13 13:13:00,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:00,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:00,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:01,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:01,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 13:13:01,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:13:01,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-13 13:13:01,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:01,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:01,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 13:13:01,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:01,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:01,019 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 60 proven. 82 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2020-10-13 13:13:01,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480679724] [2020-10-13 13:13:01,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:13:01,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 13:13:01,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436039686] [2020-10-13 13:13:01,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 13:13:01,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:13:01,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 13:13:01,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 13:13:01,021 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand 8 states. [2020-10-13 13:13:01,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:13:01,187 INFO L93 Difference]: Finished difference Result 103 states and 123 transitions. [2020-10-13 13:13:01,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 13:13:01,188 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 92 [2020-10-13 13:13:01,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:13:01,189 INFO L225 Difference]: With dead ends: 103 [2020-10-13 13:13:01,189 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 13:13:01,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-13 13:13:01,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 13:13:01,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2020-10-13 13:13:01,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 13:13:01,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2020-10-13 13:13:01,194 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 92 [2020-10-13 13:13:01,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:13:01,194 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2020-10-13 13:13:01,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 13:13:01,194 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2020-10-13 13:13:01,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 13:13:01,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:13:01,196 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:13:01,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 13:13:01,196 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:13:01,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:13:01,196 INFO L82 PathProgramCache]: Analyzing trace with hash 787878559, now seen corresponding path program 15 times [2020-10-13 13:13:01,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:13:01,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589965316] [2020-10-13 13:13:01,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:13:01,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:01,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:01,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:01,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:01,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:06,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:06,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-13 13:13:06,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:13:06,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 13:13:06,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:06,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 13:13:06,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:13:06,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 13:13:06,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:06,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:13:06,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:06,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:06,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:06,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:13:06,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:13:06,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:13:06,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:06,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:06,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:13:06,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:06,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:06,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-13 13:13:06,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:06,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:06,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:06,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:06,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 13:13:06,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:13:06,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-13 13:13:06,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:06,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:06,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 13:13:06,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:06,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:06,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-13 13:13:06,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:06,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:06,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:06,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:06,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 13:13:06,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:13:06,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-13 13:13:06,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:06,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:06,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 13:13:06,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:06,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:06,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-13 13:13:06,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:06,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:06,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:06,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:06,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 13:13:06,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:13:06,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-13 13:13:06,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:06,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:06,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 13:13:06,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:06,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:06,476 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2020-10-13 13:13:06,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589965316] [2020-10-13 13:13:06,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:13:06,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 13:13:06,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072747506] [2020-10-13 13:13:06,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 13:13:06,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:13:06,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 13:13:06,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 13:13:06,478 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand 10 states. [2020-10-13 13:13:06,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:13:06,591 INFO L93 Difference]: Finished difference Result 108 states and 126 transitions. [2020-10-13 13:13:06,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 13:13:06,592 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 101 [2020-10-13 13:13:06,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:13:06,593 INFO L225 Difference]: With dead ends: 108 [2020-10-13 13:13:06,593 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 13:13:06,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 13:13:06,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 13:13:06,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-13 13:13:06,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 13:13:06,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2020-10-13 13:13:06,598 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 101 [2020-10-13 13:13:06,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:13:06,599 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2020-10-13 13:13:06,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 13:13:06,599 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2020-10-13 13:13:06,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-13 13:13:06,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:13:06,600 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 7, 7, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:13:06,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 13:13:06,601 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:13:06,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:13:06,601 INFO L82 PathProgramCache]: Analyzing trace with hash 508329021, now seen corresponding path program 16 times [2020-10-13 13:13:06,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:13:06,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22287697] [2020-10-13 13:13:06,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:13:06,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:06,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:06,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:06,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:06,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:11,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:11,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 13:13:11,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:13:11,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 13:13:11,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:11,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 13:13:11,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-10-13 13:13:11,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 13:13:11,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:11,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:13:11,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:11,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:11,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:11,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:13:11,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:13:11,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:13:11,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:11,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:11,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:13:11,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:11,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:11,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-13 13:13:11,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:11,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:11,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:11,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:11,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 13:13:11,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:13:11,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-13 13:13:11,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:11,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:11,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:13:11,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:11,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:11,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-13 13:13:11,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:11,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:11,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:11,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:11,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 13:13:11,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:13:11,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-13 13:13:11,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:11,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:11,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:13:11,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:11,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:11,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-13 13:13:11,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:11,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:11,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:11,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:11,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 13:13:11,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:13:11,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-13 13:13:11,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:11,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:11,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 13:13:11,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:11,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2020-10-13 13:13:11,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22287697] [2020-10-13 13:13:11,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:13:11,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 13:13:11,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982277690] [2020-10-13 13:13:11,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 13:13:11,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:13:11,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 13:13:11,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 13:13:11,890 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 10 states. [2020-10-13 13:13:11,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:13:11,981 INFO L93 Difference]: Finished difference Result 93 states and 108 transitions. [2020-10-13 13:13:11,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 13:13:11,982 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 103 [2020-10-13 13:13:11,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:13:11,983 INFO L225 Difference]: With dead ends: 93 [2020-10-13 13:13:11,983 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 13:13:11,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 13:13:11,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 13:13:11,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-13 13:13:11,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 13:13:11,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2020-10-13 13:13:11,989 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 103 [2020-10-13 13:13:11,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:13:11,989 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2020-10-13 13:13:11,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 13:13:11,989 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2020-10-13 13:13:11,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-13 13:13:11,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:13:11,990 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 7, 7, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:13:11,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 13:13:11,991 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:13:11,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:13:11,991 INFO L82 PathProgramCache]: Analyzing trace with hash 457934271, now seen corresponding path program 17 times [2020-10-13 13:13:11,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:13:11,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790670576] [2020-10-13 13:13:11,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:13:11,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:12,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:12,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:12,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:12,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:17,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:17,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-13 13:13:17,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:13:17,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-13 13:13:17,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:17,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 13:13:17,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-10-13 13:13:17,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 13:13:17,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:17,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:13:17,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:17,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:17,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:17,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:13:17,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:13:17,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:13:17,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:17,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:17,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:13:17,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:17,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:17,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-13 13:13:17,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:17,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:17,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:17,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:17,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 13:13:17,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:13:17,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-13 13:13:17,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:17,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:17,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:13:17,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:17,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:17,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-13 13:13:17,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:17,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:17,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:17,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:17,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 13:13:17,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:13:17,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-13 13:13:17,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:17,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:17,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:13:17,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:17,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:17,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-13 13:13:17,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:17,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:17,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:17,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:17,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 13:13:17,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:13:17,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-13 13:13:17,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:17,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:17,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 13:13:17,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:17,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:17,286 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2020-10-13 13:13:17,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790670576] [2020-10-13 13:13:17,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:13:17,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 13:13:17,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532003533] [2020-10-13 13:13:17,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 13:13:17,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:13:17,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 13:13:17,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 13:13:17,288 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand 11 states. [2020-10-13 13:13:17,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:13:17,365 INFO L93 Difference]: Finished difference Result 95 states and 110 transitions. [2020-10-13 13:13:17,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 13:13:17,365 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 105 [2020-10-13 13:13:17,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:13:17,366 INFO L225 Difference]: With dead ends: 95 [2020-10-13 13:13:17,367 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 13:13:17,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 13:13:17,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 13:13:17,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-13 13:13:17,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 13:13:17,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2020-10-13 13:13:17,372 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 105 [2020-10-13 13:13:17,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:13:17,373 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2020-10-13 13:13:17,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 13:13:17,373 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2020-10-13 13:13:17,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 13:13:17,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:13:17,374 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 8, 8, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:13:17,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 13:13:17,374 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:13:17,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:13:17,375 INFO L82 PathProgramCache]: Analyzing trace with hash -726780223, now seen corresponding path program 18 times [2020-10-13 13:13:17,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:13:17,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1599349169] [2020-10-13 13:13:17,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:13:17,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:17,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:17,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:17,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:17,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:22,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:22,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 13:13:22,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:13:22,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 13:13:22,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:22,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 13:13:22,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:13:22,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 13:13:22,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:22,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:13:22,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:22,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:22,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:22,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:13:22,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:13:22,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:13:22,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:22,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:22,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:13:22,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:22,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:22,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-13 13:13:22,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:22,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:22,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:22,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:22,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 13:13:22,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:13:22,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-13 13:13:22,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:22,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:22,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 13:13:22,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:22,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:22,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-13 13:13:22,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:22,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:22,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:22,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:22,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 13:13:22,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:13:22,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-13 13:13:22,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:22,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:22,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 13:13:22,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:22,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:22,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-13 13:13:22,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:22,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:22,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:22,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:22,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 13:13:22,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:13:22,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-13 13:13:22,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:22,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:22,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 13:13:22,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:22,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:22,663 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2020-10-13 13:13:22,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1599349169] [2020-10-13 13:13:22,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:13:22,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 13:13:22,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21295514] [2020-10-13 13:13:22,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 13:13:22,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:13:22,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 13:13:22,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 13:13:22,665 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand 11 states. [2020-10-13 13:13:22,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:13:22,774 INFO L93 Difference]: Finished difference Result 118 states and 136 transitions. [2020-10-13 13:13:22,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 13:13:22,777 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 107 [2020-10-13 13:13:22,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:13:22,777 INFO L225 Difference]: With dead ends: 118 [2020-10-13 13:13:22,777 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 13:13:22,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 13:13:22,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 13:13:22,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-10-13 13:13:22,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 13:13:22,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2020-10-13 13:13:22,783 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 107 [2020-10-13 13:13:22,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:13:22,783 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2020-10-13 13:13:22,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 13:13:22,783 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2020-10-13 13:13:22,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-13 13:13:22,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:13:22,784 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 8, 8, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:13:22,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 13:13:22,784 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:13:22,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:13:22,784 INFO L82 PathProgramCache]: Analyzing trace with hash 2146071007, now seen corresponding path program 19 times [2020-10-13 13:13:22,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:13:22,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259776957] [2020-10-13 13:13:22,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:13:22,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:22,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:22,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:22,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:23,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:27,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:27,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-13 13:13:27,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:13:27,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 13:13:27,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:27,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 13:13:27,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 13:13:27,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 13:13:27,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:27,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:13:27,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:27,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:27,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:27,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:13:27,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:13:27,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:13:27,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:27,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:27,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:13:27,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:27,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:27,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-13 13:13:27,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:27,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:27,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:27,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 13:13:27,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:13:27,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-13 13:13:27,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:27,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 13:13:27,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 13:13:27,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 13:13:27,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:27,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-13 13:13:27,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:27,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:27,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:27,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:27,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 13:13:27,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:13:27,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-13 13:13:27,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:27,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:27,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 13:13:27,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:27,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:27,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-10-13 13:13:27,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:27,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:27,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:28,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:28,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 13:13:28,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:13:28,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-13 13:13:28,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:28,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:28,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 13:13:28,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:28,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:28,036 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-10-13 13:13:28,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259776957] [2020-10-13 13:13:28,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:13:28,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 13:13:28,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416751948] [2020-10-13 13:13:28,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 13:13:28,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:13:28,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 13:13:28,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 13:13:28,038 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 9 states. [2020-10-13 13:13:28,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:13:28,208 INFO L93 Difference]: Finished difference Result 121 states and 143 transitions. [2020-10-13 13:13:28,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 13:13:28,208 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 109 [2020-10-13 13:13:28,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:13:28,209 INFO L225 Difference]: With dead ends: 121 [2020-10-13 13:13:28,209 INFO L226 Difference]: Without dead ends: 75 [2020-10-13 13:13:28,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-13 13:13:28,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-13 13:13:28,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-10-13 13:13:28,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 13:13:28,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2020-10-13 13:13:28,215 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 109 [2020-10-13 13:13:28,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:13:28,215 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2020-10-13 13:13:28,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 13:13:28,215 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2020-10-13 13:13:28,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-13 13:13:28,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:13:28,217 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 8, 8, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:13:28,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 13:13:28,217 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:13:28,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:13:28,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1402725290, now seen corresponding path program 20 times [2020-10-13 13:13:28,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:13:28,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575433534] [2020-10-13 13:13:28,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:13:28,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:28,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:28,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:28,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:28,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:33,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:33,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-13 13:13:33,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:13:33,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 13:13:33,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:33,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 13:13:33,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:13:33,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 13:13:33,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:33,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:13:33,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:33,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:33,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:33,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:13:33,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:13:33,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:13:33,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:33,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:33,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:13:33,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:33,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:33,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-13 13:13:33,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:33,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:33,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:33,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:33,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 13:13:33,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:13:33,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-13 13:13:33,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:33,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:33,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 13:13:33,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:33,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:33,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-13 13:13:33,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:33,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:33,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:33,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:33,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 13:13:33,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:13:33,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-13 13:13:33,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:33,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:33,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 13:13:33,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:33,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:33,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-13 13:13:33,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:33,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:33,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:33,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:33,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 13:13:33,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:13:33,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-13 13:13:33,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:33,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:33,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 13:13:33,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:33,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:33,600 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2020-10-13 13:13:33,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575433534] [2020-10-13 13:13:33,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:13:33,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 13:13:33,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462972723] [2020-10-13 13:13:33,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 13:13:33,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:13:33,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 13:13:33,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 13:13:33,602 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand 12 states. [2020-10-13 13:13:33,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:13:33,702 INFO L93 Difference]: Finished difference Result 126 states and 146 transitions. [2020-10-13 13:13:33,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 13:13:33,702 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 118 [2020-10-13 13:13:33,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:13:33,703 INFO L225 Difference]: With dead ends: 126 [2020-10-13 13:13:33,703 INFO L226 Difference]: Without dead ends: 76 [2020-10-13 13:13:33,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 13:13:33,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-13 13:13:33,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-13 13:13:33,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 13:13:33,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2020-10-13 13:13:33,708 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 118 [2020-10-13 13:13:33,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:13:33,708 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2020-10-13 13:13:33,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 13:13:33,708 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2020-10-13 13:13:33,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-13 13:13:33,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:13:33,709 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 9, 9, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:13:33,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 13:13:33,709 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:13:33,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:13:33,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1147772296, now seen corresponding path program 21 times [2020-10-13 13:13:33,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:13:33,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806446370] [2020-10-13 13:13:33,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:13:33,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:33,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:33,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:33,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:33,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:38,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:38,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-13 13:13:38,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:13:38,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 13:13:38,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:38,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 13:13:38,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-13 13:13:38,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 13:13:38,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:38,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:13:38,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:38,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:38,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:38,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:13:38,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:13:38,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:13:38,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:38,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:38,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:13:38,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:38,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:38,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-13 13:13:38,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:38,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:38,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:38,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:38,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 13:13:38,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:13:38,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-13 13:13:38,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:38,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:38,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:13:38,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:38,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:38,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 13:13:38,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:38,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:38,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:38,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:38,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 13:13:38,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:13:38,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-13 13:13:38,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:38,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:38,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:13:38,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:38,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:38,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-10-13 13:13:38,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:38,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:38,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:39,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:39,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 13:13:39,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:13:39,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-13 13:13:39,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:39,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:39,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 13:13:39,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:39,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:39,067 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2020-10-13 13:13:39,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806446370] [2020-10-13 13:13:39,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:13:39,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 13:13:39,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607558628] [2020-10-13 13:13:39,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 13:13:39,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:13:39,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 13:13:39,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 13:13:39,069 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand 12 states. [2020-10-13 13:13:39,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:13:39,190 INFO L93 Difference]: Finished difference Result 107 states and 124 transitions. [2020-10-13 13:13:39,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 13:13:39,191 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 120 [2020-10-13 13:13:39,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:13:39,192 INFO L225 Difference]: With dead ends: 107 [2020-10-13 13:13:39,192 INFO L226 Difference]: Without dead ends: 78 [2020-10-13 13:13:39,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 13:13:39,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-13 13:13:39,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-13 13:13:39,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-13 13:13:39,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2020-10-13 13:13:39,198 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 120 [2020-10-13 13:13:39,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:13:39,199 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2020-10-13 13:13:39,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 13:13:39,199 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2020-10-13 13:13:39,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-13 13:13:39,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:13:39,200 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 9, 9, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:13:39,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 13:13:39,200 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:13:39,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:13:39,201 INFO L82 PathProgramCache]: Analyzing trace with hash 569222454, now seen corresponding path program 22 times [2020-10-13 13:13:39,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:13:39,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565301880] [2020-10-13 13:13:39,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:13:39,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:39,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:39,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:39,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:39,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:44,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:44,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-13 13:13:44,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:13:44,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-13 13:13:44,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:44,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 13:13:44,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-13 13:13:44,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 13:13:44,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:44,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:13:44,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:44,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:44,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:44,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:13:44,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:13:44,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:13:44,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:44,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:44,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:13:44,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:44,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:44,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-13 13:13:44,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:44,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:44,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:44,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:44,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 13:13:44,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:13:44,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-13 13:13:44,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:44,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:44,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:13:44,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:44,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:44,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 13:13:44,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:44,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:44,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:44,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:44,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 13:13:44,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:13:44,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-13 13:13:44,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:44,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:44,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:13:44,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:44,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:44,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-13 13:13:44,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:44,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:44,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:44,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:44,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 13:13:44,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:13:44,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-13 13:13:44,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:44,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:44,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 13:13:44,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:44,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:44,603 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2020-10-13 13:13:44,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565301880] [2020-10-13 13:13:44,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:13:44,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 13:13:44,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285593917] [2020-10-13 13:13:44,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 13:13:44,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:13:44,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 13:13:44,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 13:13:44,604 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 13 states. [2020-10-13 13:13:44,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:13:44,704 INFO L93 Difference]: Finished difference Result 109 states and 126 transitions. [2020-10-13 13:13:44,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 13:13:44,705 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 122 [2020-10-13 13:13:44,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:13:44,706 INFO L225 Difference]: With dead ends: 109 [2020-10-13 13:13:44,706 INFO L226 Difference]: Without dead ends: 80 [2020-10-13 13:13:44,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 13:13:44,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-13 13:13:44,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-13 13:13:44,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 13:13:44,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2020-10-13 13:13:44,712 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 122 [2020-10-13 13:13:44,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:13:44,712 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2020-10-13 13:13:44,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 13:13:44,712 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2020-10-13 13:13:44,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-13 13:13:44,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:13:44,713 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 10, 10, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:13:44,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 13:13:44,714 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:13:44,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:13:44,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1333735540, now seen corresponding path program 23 times [2020-10-13 13:13:44,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:13:44,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339997239] [2020-10-13 13:13:44,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:13:44,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:44,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:44,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:44,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:45,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:49,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:49,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-13 13:13:49,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:13:49,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-13 13:13:49,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:49,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 13:13:49,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:13:49,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 13:13:49,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:13:49,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:13:49,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:49,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:49,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:49,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:13:49,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:13:49,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:13:49,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:49,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:49,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:13:49,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:49,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:49,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-13 13:13:49,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:49,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:49,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:50,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:50,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 13:13:50,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:13:50,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-13 13:13:50,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:50,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:50,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 13:13:50,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:50,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:50,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 13:13:50,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:50,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:50,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:50,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:50,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 13:13:50,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:13:50,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-13 13:13:50,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:50,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:50,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 13:13:50,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:50,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:50,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-10-13 13:13:50,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:50,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:50,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:50,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:50,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 13:13:50,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:13:50,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-13 13:13:50,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:50,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:50,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 13:13:50,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:50,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:50,337 INFO L134 CoverageAnalysis]: Checked inductivity of 709 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2020-10-13 13:13:50,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339997239] [2020-10-13 13:13:50,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:13:50,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 13:13:50,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536337208] [2020-10-13 13:13:50,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 13:13:50,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:13:50,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 13:13:50,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 13:13:50,341 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 13 states. [2020-10-13 13:13:50,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:13:50,462 INFO L93 Difference]: Finished difference Result 136 states and 156 transitions. [2020-10-13 13:13:50,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 13:13:50,463 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 124 [2020-10-13 13:13:50,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:13:50,464 INFO L225 Difference]: With dead ends: 136 [2020-10-13 13:13:50,464 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 13:13:50,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 13:13:50,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 13:13:50,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-13 13:13:50,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 13:13:50,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2020-10-13 13:13:50,470 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 124 [2020-10-13 13:13:50,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:13:50,470 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2020-10-13 13:13:50,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 13:13:50,470 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2020-10-13 13:13:50,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-13 13:13:50,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:13:50,471 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 10, 10, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:13:50,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 13:13:50,472 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:13:50,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:13:50,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1409755882, now seen corresponding path program 24 times [2020-10-13 13:13:50,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:13:50,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028454639] [2020-10-13 13:13:50,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:13:50,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:50,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:50,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:50,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:51,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:55,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:55,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-13 13:13:55,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:13:55,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-13 13:13:55,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:55,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 13:13:55,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 13:13:55,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 13:13:55,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:55,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:13:55,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:55,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:55,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:55,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:13:55,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:13:55,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:13:55,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:55,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:55,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:13:55,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:55,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:55,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-13 13:13:55,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:55,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:55,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:55,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 13:13:55,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:13:55,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-13 13:13:55,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:55,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 13:13:55,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 13:13:55,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 13:13:55,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:55,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-13 13:13:55,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:55,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:55,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:55,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:55,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 13:13:55,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:13:55,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-13 13:13:55,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:55,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:55,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 13:13:55,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:55,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:55,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-10-13 13:13:55,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:55,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:55,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:55,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:13:55,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 13:13:55,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:13:55,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-13 13:13:55,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:13:55,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:13:55,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 13:13:55,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:13:55,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:13:55,826 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 429 trivial. 0 not checked. [2020-10-13 13:13:55,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028454639] [2020-10-13 13:13:55,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:13:55,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 13:13:55,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179210173] [2020-10-13 13:13:55,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 13:13:55,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:13:55,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 13:13:55,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 13:13:55,828 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand 10 states. [2020-10-13 13:13:56,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:13:56,030 INFO L93 Difference]: Finished difference Result 139 states and 163 transitions. [2020-10-13 13:13:56,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 13:13:56,030 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 126 [2020-10-13 13:13:56,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:13:56,031 INFO L225 Difference]: With dead ends: 139 [2020-10-13 13:13:56,031 INFO L226 Difference]: Without dead ends: 86 [2020-10-13 13:13:56,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-13 13:13:56,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-13 13:13:56,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2020-10-13 13:13:56,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 13:13:56,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2020-10-13 13:13:56,038 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 126 [2020-10-13 13:13:56,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:13:56,038 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2020-10-13 13:13:56,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 13:13:56,039 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2020-10-13 13:13:56,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-13 13:13:56,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:13:56,040 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 10, 10, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:13:56,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 13:13:56,040 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:13:56,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:13:56,040 INFO L82 PathProgramCache]: Analyzing trace with hash 595198463, now seen corresponding path program 25 times [2020-10-13 13:13:56,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:13:56,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787105500] [2020-10-13 13:13:56,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:13:56,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:13:56,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:56,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:56,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:13:56,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:01,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:01,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-13 13:14:01,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:14:01,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-13 13:14:01,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:01,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 13:14:01,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:14:01,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 13:14:01,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:01,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:14:01,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:01,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:01,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:01,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:14:01,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:14:01,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:14:01,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:01,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:01,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:14:01,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:01,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:01,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-13 13:14:01,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:01,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:01,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:01,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:01,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 13:14:01,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:14:01,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-13 13:14:01,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:01,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:01,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 13:14:01,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:01,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:01,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-13 13:14:01,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:01,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:01,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:01,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:01,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 13:14:01,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:14:01,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-13 13:14:01,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:01,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:01,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 13:14:01,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:01,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:01,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-10-13 13:14:01,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:01,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:01,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:01,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:01,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 13:14:01,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:14:01,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-13 13:14:01,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:01,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:01,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 13:14:01,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:01,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:01,637 INFO L134 CoverageAnalysis]: Checked inductivity of 908 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 808 trivial. 0 not checked. [2020-10-13 13:14:01,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787105500] [2020-10-13 13:14:01,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:14:01,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 13:14:01,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981111142] [2020-10-13 13:14:01,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 13:14:01,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:14:01,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 13:14:01,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 13:14:01,639 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand 14 states. [2020-10-13 13:14:01,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:14:01,771 INFO L93 Difference]: Finished difference Result 144 states and 166 transitions. [2020-10-13 13:14:01,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 13:14:01,771 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 135 [2020-10-13 13:14:01,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:14:01,772 INFO L225 Difference]: With dead ends: 144 [2020-10-13 13:14:01,772 INFO L226 Difference]: Without dead ends: 87 [2020-10-13 13:14:01,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 13:14:01,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-13 13:14:01,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-10-13 13:14:01,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-13 13:14:01,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 97 transitions. [2020-10-13 13:14:01,785 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 97 transitions. Word has length 135 [2020-10-13 13:14:01,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:14:01,785 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 97 transitions. [2020-10-13 13:14:01,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 13:14:01,785 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 97 transitions. [2020-10-13 13:14:01,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-13 13:14:01,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:14:01,787 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 11, 11, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:14:01,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 13:14:01,787 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:14:01,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:14:01,787 INFO L82 PathProgramCache]: Analyzing trace with hash 498893853, now seen corresponding path program 26 times [2020-10-13 13:14:01,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:14:01,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863259207] [2020-10-13 13:14:01,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:14:01,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:01,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:01,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:01,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:02,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:06,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:06,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-13 13:14:06,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:14:06,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-13 13:14:06,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:06,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 13:14:06,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 94 [2020-10-13 13:14:06,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 13:14:06,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:06,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:14:06,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:06,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:06,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:06,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:14:06,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:14:06,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:14:06,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:06,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:06,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:14:06,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:06,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:06,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-13 13:14:06,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:06,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:06,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:07,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:07,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 13:14:07,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:14:07,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-13 13:14:07,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:07,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:07,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:14:07,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:07,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:07,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-13 13:14:07,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:07,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:07,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:07,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:07,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 13:14:07,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:14:07,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-13 13:14:07,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:07,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:07,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:14:07,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:07,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:07,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-10-13 13:14:07,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:07,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:07,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:07,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:07,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 13:14:07,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:14:07,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-13 13:14:07,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:07,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:07,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 13:14:07,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:07,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:07,291 INFO L134 CoverageAnalysis]: Checked inductivity of 929 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 829 trivial. 0 not checked. [2020-10-13 13:14:07,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863259207] [2020-10-13 13:14:07,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:14:07,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 13:14:07,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820240638] [2020-10-13 13:14:07,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 13:14:07,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:14:07,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 13:14:07,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 13:14:07,293 INFO L87 Difference]: Start difference. First operand 86 states and 97 transitions. Second operand 14 states. [2020-10-13 13:14:07,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:14:07,439 INFO L93 Difference]: Finished difference Result 121 states and 140 transitions. [2020-10-13 13:14:07,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 13:14:07,439 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 137 [2020-10-13 13:14:07,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:14:07,440 INFO L225 Difference]: With dead ends: 121 [2020-10-13 13:14:07,440 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 13:14:07,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 13:14:07,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 13:14:07,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-13 13:14:07,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 13:14:07,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 99 transitions. [2020-10-13 13:14:07,445 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 99 transitions. Word has length 137 [2020-10-13 13:14:07,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:14:07,446 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 99 transitions. [2020-10-13 13:14:07,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 13:14:07,446 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 99 transitions. [2020-10-13 13:14:07,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-13 13:14:07,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:14:07,447 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 11, 11, 11, 11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:14:07,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 13:14:07,447 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:14:07,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:14:07,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1473889311, now seen corresponding path program 27 times [2020-10-13 13:14:07,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:14:07,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760796777] [2020-10-13 13:14:07,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:14:07,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:07,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:07,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:07,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:07,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:12,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:12,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-13 13:14:12,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:14:12,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 13:14:12,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:12,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 13:14:12,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 68 [2020-10-13 13:14:12,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 13:14:12,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:12,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:14:12,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:12,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:12,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:12,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:14:12,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:14:12,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:14:12,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:12,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:12,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:14:12,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:12,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:12,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-13 13:14:12,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:12,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:12,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:12,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:12,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 13:14:12,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:14:12,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-13 13:14:12,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:12,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:12,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:14:12,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:12,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:12,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-13 13:14:12,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:12,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:12,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:12,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 13:14:12,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:14:12,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-13 13:14:12,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:12,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 13:14:12,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 13:14:12,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 13:14:12,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:12,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-10-13 13:14:12,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:12,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:12,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:12,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:12,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 13:14:12,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:14:12,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-13 13:14:12,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:12,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:12,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 13:14:12,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:12,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:12,897 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 165 proven. 235 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2020-10-13 13:14:12,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760796777] [2020-10-13 13:14:12,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:14:12,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 13:14:12,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237713531] [2020-10-13 13:14:12,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 13:14:12,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:14:12,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 13:14:12,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 13:14:12,898 INFO L87 Difference]: Start difference. First operand 88 states and 99 transitions. Second operand 11 states. [2020-10-13 13:14:13,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:14:13,128 INFO L93 Difference]: Finished difference Result 151 states and 177 transitions. [2020-10-13 13:14:13,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 13:14:13,129 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 139 [2020-10-13 13:14:13,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:14:13,130 INFO L225 Difference]: With dead ends: 151 [2020-10-13 13:14:13,130 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 13:14:13,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-13 13:14:13,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 13:14:13,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2020-10-13 13:14:13,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-13 13:14:13,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2020-10-13 13:14:13,136 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 139 [2020-10-13 13:14:13,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:14:13,136 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2020-10-13 13:14:13,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 13:14:13,137 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2020-10-13 13:14:13,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-13 13:14:13,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:14:13,138 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 11, 11, 11, 11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:14:13,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 13:14:13,138 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:14:13,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:14:13,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1256577770, now seen corresponding path program 28 times [2020-10-13 13:14:13,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:14:13,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489234799] [2020-10-13 13:14:13,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:14:13,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:13,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:13,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:13,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:13,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:18,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:18,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-13 13:14:18,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:14:18,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-13 13:14:18,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:18,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 13:14:18,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 100 [2020-10-13 13:14:18,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 13:14:18,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:18,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:14:18,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:18,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:18,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:18,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:14:18,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:14:18,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:14:18,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:18,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:18,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:14:18,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:18,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:18,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-13 13:14:18,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:18,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:18,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:18,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:18,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 13:14:18,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:14:18,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-13 13:14:18,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:18,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:18,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:14:18,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:18,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:18,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-13 13:14:18,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:18,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:18,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:18,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:18,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 13:14:18,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:14:18,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-13 13:14:18,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:18,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:18,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:14:18,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:18,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:18,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-10-13 13:14:18,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:18,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:18,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:18,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:18,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 13:14:18,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:14:18,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-13 13:14:18,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:18,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:18,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 13:14:18,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:18,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:18,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1036 trivial. 0 not checked. [2020-10-13 13:14:18,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489234799] [2020-10-13 13:14:18,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:14:18,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 13:14:18,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403194605] [2020-10-13 13:14:18,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 13:14:18,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:14:18,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 13:14:18,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 13:14:18,731 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand 15 states. [2020-10-13 13:14:18,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:14:18,874 INFO L93 Difference]: Finished difference Result 129 states and 150 transitions. [2020-10-13 13:14:18,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 13:14:18,875 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 148 [2020-10-13 13:14:18,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:14:18,876 INFO L225 Difference]: With dead ends: 129 [2020-10-13 13:14:18,876 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 13:14:18,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 13:14:18,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 13:14:18,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-13 13:14:18,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-13 13:14:18,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2020-10-13 13:14:18,882 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 148 [2020-10-13 13:14:18,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:14:18,882 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2020-10-13 13:14:18,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 13:14:18,882 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2020-10-13 13:14:18,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-13 13:14:18,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:14:18,883 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 12, 12, 11, 11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:14:18,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 13:14:18,884 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:14:18,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:14:18,884 INFO L82 PathProgramCache]: Analyzing trace with hash 534641108, now seen corresponding path program 29 times [2020-10-13 13:14:18,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:14:18,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312581221] [2020-10-13 13:14:18,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:14:18,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:18,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:18,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:18,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:19,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:23,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:23,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-13 13:14:23,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:14:23,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 13:14:23,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:23,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 13:14:23,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:14:23,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 13:14:23,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:24,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:14:24,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:24,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:24,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:24,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:14:24,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:14:24,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:14:24,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:24,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:24,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:14:24,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:24,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:24,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-13 13:14:24,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:24,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:24,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:24,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:24,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 13:14:24,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:14:24,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-13 13:14:24,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:24,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:24,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 13:14:24,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:24,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:24,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-13 13:14:24,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:24,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:24,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:24,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:24,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 13:14:24,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:14:24,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-13 13:14:24,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:24,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:24,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 13:14:24,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:24,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:24,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-10-13 13:14:24,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:24,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:24,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:24,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:24,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 13:14:24,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:14:24,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-13 13:14:24,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:24,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:24,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 13:14:24,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:24,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:24,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1059 trivial. 0 not checked. [2020-10-13 13:14:24,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312581221] [2020-10-13 13:14:24,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:14:24,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 13:14:24,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400998997] [2020-10-13 13:14:24,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 13:14:24,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:14:24,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 13:14:24,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 13:14:24,468 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand 15 states. [2020-10-13 13:14:24,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:14:24,609 INFO L93 Difference]: Finished difference Result 160 states and 184 transitions. [2020-10-13 13:14:24,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 13:14:24,609 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 150 [2020-10-13 13:14:24,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:14:24,610 INFO L225 Difference]: With dead ends: 160 [2020-10-13 13:14:24,610 INFO L226 Difference]: Without dead ends: 96 [2020-10-13 13:14:24,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 13:14:24,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-13 13:14:24,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-13 13:14:24,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-13 13:14:24,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2020-10-13 13:14:24,616 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 150 [2020-10-13 13:14:24,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:14:24,616 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2020-10-13 13:14:24,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 13:14:24,617 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2020-10-13 13:14:24,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-13 13:14:24,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:14:24,618 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 12, 12, 12, 12, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:14:24,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 13:14:24,618 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:14:24,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:14:24,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1692452874, now seen corresponding path program 30 times [2020-10-13 13:14:24,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:14:24,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917606150] [2020-10-13 13:14:24,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:14:24,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:24,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:24,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:24,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:25,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:29,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:29,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-13 13:14:29,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:14:29,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-13 13:14:29,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:29,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 13:14:29,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-13 13:14:29,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 13:14:29,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:29,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:14:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:29,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:29,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:29,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:14:29,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:14:29,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:14:29,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:29,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:29,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:14:29,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:29,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:29,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 13:14:29,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:29,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:29,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:29,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:29,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 13:14:29,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:14:29,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-13 13:14:29,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:29,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:29,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:14:29,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:29,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:29,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-13 13:14:29,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:29,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:29,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:29,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 13:14:29,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:14:29,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-13 13:14:29,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:29,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 13:14:29,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 13:14:29,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 13:14:29,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:29,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-10-13 13:14:29,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:29,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:29,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:30,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:30,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 13:14:30,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:14:30,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-13 13:14:30,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:30,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:30,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 13:14:30,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:30,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:30,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1203 backedges. 212 proven. 304 refuted. 0 times theorem prover too weak. 687 trivial. 0 not checked. [2020-10-13 13:14:30,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917606150] [2020-10-13 13:14:30,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:14:30,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 13:14:30,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412451062] [2020-10-13 13:14:30,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 13:14:30,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:14:30,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 13:14:30,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 13:14:30,129 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand 12 states. [2020-10-13 13:14:30,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:14:30,368 INFO L93 Difference]: Finished difference Result 163 states and 191 transitions. [2020-10-13 13:14:30,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 13:14:30,368 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 152 [2020-10-13 13:14:30,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:14:30,369 INFO L225 Difference]: With dead ends: 163 [2020-10-13 13:14:30,369 INFO L226 Difference]: Without dead ends: 100 [2020-10-13 13:14:30,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-13 13:14:30,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-13 13:14:30,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2020-10-13 13:14:30,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-13 13:14:30,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 111 transitions. [2020-10-13 13:14:30,375 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 111 transitions. Word has length 152 [2020-10-13 13:14:30,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:14:30,376 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 111 transitions. [2020-10-13 13:14:30,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 13:14:30,376 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 111 transitions. [2020-10-13 13:14:30,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-13 13:14:30,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:14:30,377 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 12, 12, 12, 12, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:14:30,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 13:14:30,377 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:14:30,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:14:30,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1804654049, now seen corresponding path program 31 times [2020-10-13 13:14:30,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:14:30,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878334274] [2020-10-13 13:14:30,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:14:30,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:30,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:30,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:30,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:31,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:35,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:35,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-13 13:14:35,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:14:35,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 13:14:35,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:35,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 13:14:35,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 108 [2020-10-13 13:14:35,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 13:14:35,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:35,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:14:35,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:35,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:35,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:35,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:14:35,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:14:35,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:14:35,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:35,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:35,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:14:35,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:35,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:35,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 13:14:35,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:35,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:35,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:35,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:35,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 13:14:35,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:14:35,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-13 13:14:35,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:35,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:35,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:14:35,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:35,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:35,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-13 13:14:35,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:35,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:35,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:35,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:35,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 13:14:35,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:14:35,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-13 13:14:35,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:35,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:35,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:14:35,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:35,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:35,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-10-13 13:14:35,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:35,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:35,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:35,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:35,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 13:14:35,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:14:35,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-13 13:14:35,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:35,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:35,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 13:14:35,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:35,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:36,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1437 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1293 trivial. 0 not checked. [2020-10-13 13:14:36,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878334274] [2020-10-13 13:14:36,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:14:36,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 13:14:36,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335172590] [2020-10-13 13:14:36,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 13:14:36,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:14:36,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 13:14:36,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 13:14:36,002 INFO L87 Difference]: Start difference. First operand 98 states and 111 transitions. Second operand 16 states. [2020-10-13 13:14:36,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:14:36,127 INFO L93 Difference]: Finished difference Result 139 states and 162 transitions. [2020-10-13 13:14:36,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 13:14:36,128 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 161 [2020-10-13 13:14:36,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:14:36,129 INFO L225 Difference]: With dead ends: 139 [2020-10-13 13:14:36,129 INFO L226 Difference]: Without dead ends: 101 [2020-10-13 13:14:36,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 13:14:36,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-13 13:14:36,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-10-13 13:14:36,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 13:14:36,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 113 transitions. [2020-10-13 13:14:36,135 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 113 transitions. Word has length 161 [2020-10-13 13:14:36,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:14:36,135 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 113 transitions. [2020-10-13 13:14:36,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 13:14:36,136 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 113 transitions. [2020-10-13 13:14:36,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-13 13:14:36,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:14:36,137 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 13, 13, 12, 12, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:14:36,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 13:14:36,137 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:14:36,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:14:36,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1960755233, now seen corresponding path program 32 times [2020-10-13 13:14:36,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:14:36,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237464660] [2020-10-13 13:14:36,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:14:36,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:36,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:36,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:36,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:36,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:41,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:41,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-13 13:14:41,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:14:41,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5070 [2020-10-13 13:14:41,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:41,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 13:14:41,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:14:41,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 13:14:41,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:41,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:14:41,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:41,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:41,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:41,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:14:41,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:14:41,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:14:41,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:41,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:41,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:14:41,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:41,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:41,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 13:14:41,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:41,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:41,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:41,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:41,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 13:14:41,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:14:41,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-13 13:14:41,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:41,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:41,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 13:14:41,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:41,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:41,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-13 13:14:41,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:41,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:41,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:41,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:41,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 13:14:41,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:14:41,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-13 13:14:41,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:41,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:41,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 13:14:41,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:41,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:41,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-10-13 13:14:41,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:41,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:41,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:41,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:41,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 13:14:41,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:14:41,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-13 13:14:41,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:41,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:41,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 13:14:41,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:41,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:41,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1462 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1318 trivial. 0 not checked. [2020-10-13 13:14:41,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237464660] [2020-10-13 13:14:41,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:14:41,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 13:14:41,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333186918] [2020-10-13 13:14:41,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 13:14:41,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:14:41,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 13:14:41,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 13:14:41,737 INFO L87 Difference]: Start difference. First operand 100 states and 113 transitions. Second operand 16 states. [2020-10-13 13:14:41,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:14:41,877 INFO L93 Difference]: Finished difference Result 172 states and 198 transitions. [2020-10-13 13:14:41,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 13:14:41,877 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 163 [2020-10-13 13:14:41,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:14:41,878 INFO L225 Difference]: With dead ends: 172 [2020-10-13 13:14:41,878 INFO L226 Difference]: Without dead ends: 103 [2020-10-13 13:14:41,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 13:14:41,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-13 13:14:41,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-13 13:14:41,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-13 13:14:41,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 115 transitions. [2020-10-13 13:14:41,884 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 115 transitions. Word has length 163 [2020-10-13 13:14:41,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:14:41,885 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 115 transitions. [2020-10-13 13:14:41,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 13:14:41,885 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 115 transitions. [2020-10-13 13:14:41,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-13 13:14:41,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:14:41,886 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 13, 13, 13, 13, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:14:41,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 13:14:41,886 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:14:41,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:14:41,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1048114881, now seen corresponding path program 33 times [2020-10-13 13:14:41,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:14:41,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795089647] [2020-10-13 13:14:41,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:14:41,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:41,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:41,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:41,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:42,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:46,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:46,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-13 13:14:46,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:14:46,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-10-13 13:14:46,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:46,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 13:14:46,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-13 13:14:46,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 13:14:46,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:47,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:14:47,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:47,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:47,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:47,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:14:47,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:14:47,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:14:47,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:47,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:47,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:14:47,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:47,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:47,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-13 13:14:47,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:47,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:47,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:47,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:47,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 13:14:47,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:14:47,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-13 13:14:47,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:47,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:47,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:14:47,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:47,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:47,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-13 13:14:47,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:47,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:47,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:47,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:47,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 13:14:47,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:14:47,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-13 13:14:47,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:47,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:47,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:14:47,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:47,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:47,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-10-13 13:14:47,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:47,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:47,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:47,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:47,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 13:14:47,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:14:47,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-13 13:14:47,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:47,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:47,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 13:14:47,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:47,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:47,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1487 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1318 trivial. 0 not checked. [2020-10-13 13:14:47,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795089647] [2020-10-13 13:14:47,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:14:47,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 13:14:47,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127564514] [2020-10-13 13:14:47,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 13:14:47,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:14:47,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 13:14:47,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 13:14:47,593 INFO L87 Difference]: Start difference. First operand 102 states and 115 transitions. Second operand 17 states. [2020-10-13 13:14:47,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:14:47,753 INFO L93 Difference]: Finished difference Result 143 states and 166 transitions. [2020-10-13 13:14:47,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 13:14:47,754 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 165 [2020-10-13 13:14:47,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:14:47,755 INFO L225 Difference]: With dead ends: 143 [2020-10-13 13:14:47,755 INFO L226 Difference]: Without dead ends: 105 [2020-10-13 13:14:47,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 13:14:47,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-13 13:14:47,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-10-13 13:14:47,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 13:14:47,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 117 transitions. [2020-10-13 13:14:47,764 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 117 transitions. Word has length 165 [2020-10-13 13:14:47,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:14:47,765 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 117 transitions. [2020-10-13 13:14:47,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 13:14:47,765 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 117 transitions. [2020-10-13 13:14:47,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-13 13:14:47,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:14:47,766 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 14, 14, 13, 13, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:14:47,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 13:14:47,767 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:14:47,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:14:47,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1149544639, now seen corresponding path program 34 times [2020-10-13 13:14:47,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:14:47,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461734230] [2020-10-13 13:14:47,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:14:47,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:47,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:47,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:47,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:47,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:52,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:52,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-13 13:14:52,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:14:52,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-13 13:14:52,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:52,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 13:14:52,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:14:52,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 13:14:52,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:52,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:14:52,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:52,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:52,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:52,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:14:52,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:14:52,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:14:52,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:52,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:52,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:14:52,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:52,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:52,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-13 13:14:52,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:52,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:53,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:53,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:53,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 13:14:53,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:14:53,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-13 13:14:53,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:53,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:53,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 13:14:53,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:53,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:53,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-13 13:14:53,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:53,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:53,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:53,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:53,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 13:14:53,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:14:53,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-13 13:14:53,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:53,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:53,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 13:14:53,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:53,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:53,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-10-13 13:14:53,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:53,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:53,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:53,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:53,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 13:14:53,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:14:53,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-13 13:14:53,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:53,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:53,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 13:14:53,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:53,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:53,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1514 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1345 trivial. 0 not checked. [2020-10-13 13:14:53,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461734230] [2020-10-13 13:14:53,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:14:53,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 13:14:53,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555247508] [2020-10-13 13:14:53,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 13:14:53,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:14:53,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 13:14:53,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 13:14:53,392 INFO L87 Difference]: Start difference. First operand 104 states and 117 transitions. Second operand 17 states. [2020-10-13 13:14:53,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:14:53,512 INFO L93 Difference]: Finished difference Result 178 states and 204 transitions. [2020-10-13 13:14:53,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 13:14:53,512 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 167 [2020-10-13 13:14:53,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:14:53,513 INFO L225 Difference]: With dead ends: 178 [2020-10-13 13:14:53,513 INFO L226 Difference]: Without dead ends: 107 [2020-10-13 13:14:53,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 13:14:53,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-13 13:14:53,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-13 13:14:53,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 13:14:53,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 119 transitions. [2020-10-13 13:14:53,519 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 119 transitions. Word has length 167 [2020-10-13 13:14:53,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:14:53,519 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 119 transitions. [2020-10-13 13:14:53,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 13:14:53,519 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 119 transitions. [2020-10-13 13:14:53,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-13 13:14:53,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:14:53,520 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 14, 14, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:14:53,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 13:14:53,521 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:14:53,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:14:53,521 INFO L82 PathProgramCache]: Analyzing trace with hash 2055070047, now seen corresponding path program 35 times [2020-10-13 13:14:53,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:14:53,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083831147] [2020-10-13 13:14:53,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:14:53,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:53,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:53,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:53,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:54,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:58,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:58,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-13 13:14:58,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:14:58,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 13:14:58,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:58,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 13:14:58,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 13:14:58,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 13:14:58,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:58,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:14:58,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:58,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:58,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:58,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:14:58,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:14:58,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:14:58,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:58,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:58,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:14:58,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:58,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:58,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-13 13:14:58,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:58,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:58,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:58,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 13:14:58,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:14:58,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-13 13:14:58,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:58,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 13:14:58,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 13:14:58,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 13:14:58,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:58,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-13 13:14:58,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:58,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:58,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:58,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:58,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 13:14:58,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:14:58,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-13 13:14:58,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:58,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:58,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 13:14:58,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:58,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:58,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-10-13 13:14:58,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:58,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:58,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:59,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:14:59,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 13:14:59,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:14:59,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-13 13:14:59,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:14:59,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:14:59,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 13:14:59,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:14:59,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:14:59,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 0 proven. 647 refuted. 0 times theorem prover too weak. 894 trivial. 0 not checked. [2020-10-13 13:14:59,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083831147] [2020-10-13 13:14:59,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:14:59,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 13:14:59,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694278606] [2020-10-13 13:14:59,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 13:14:59,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:14:59,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 13:14:59,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 13:14:59,055 INFO L87 Difference]: Start difference. First operand 106 states and 119 transitions. Second operand 13 states. [2020-10-13 13:14:59,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:14:59,331 INFO L93 Difference]: Finished difference Result 181 states and 211 transitions. [2020-10-13 13:14:59,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 13:14:59,331 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 169 [2020-10-13 13:14:59,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:14:59,332 INFO L225 Difference]: With dead ends: 181 [2020-10-13 13:14:59,333 INFO L226 Difference]: Without dead ends: 111 [2020-10-13 13:14:59,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-13 13:14:59,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-13 13:14:59,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2020-10-13 13:14:59,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-13 13:14:59,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 123 transitions. [2020-10-13 13:14:59,338 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 123 transitions. Word has length 169 [2020-10-13 13:14:59,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:14:59,339 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 123 transitions. [2020-10-13 13:14:59,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 13:14:59,339 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 123 transitions. [2020-10-13 13:14:59,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-13 13:14:59,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:14:59,340 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 14, 14, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:14:59,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 13:14:59,341 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:14:59,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:14:59,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1620640470, now seen corresponding path program 36 times [2020-10-13 13:14:59,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:14:59,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599211704] [2020-10-13 13:14:59,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:14:59,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:14:59,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:59,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:59,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:14:59,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:04,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:15:04,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 190 [2020-10-13 13:15:04,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:15:04,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 13:15:04,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:15:04,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 13:15:04,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:15:04,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 13:15:04,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:15:04,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:15:04,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:15:04,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:04,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:15:04,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:15:04,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:15:04,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:15:04,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:15:04,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:15:04,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:15:04,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:15:04,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:15:04,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-13 13:15:04,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:15:04,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:04,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:04,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:15:04,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 13:15:04,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:15:04,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 224 [2020-10-13 13:15:04,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:15:04,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:15:04,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 13:15:04,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:15:04,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:15:04,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-10-13 13:15:04,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:15:04,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:04,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:04,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:15:04,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 13:15:04,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:15:04,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-13 13:15:04,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:15:04,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:15:04,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 13:15:04,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:15:04,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:15:04,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-13 13:15:04,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:15:04,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:04,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:05,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:15:05,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 13:15:05,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:15:05,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-13 13:15:05,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:15:05,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:15:05,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 13:15:05,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:15:05,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:15:05,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1802 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1606 trivial. 0 not checked. [2020-10-13 13:15:05,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599211704] [2020-10-13 13:15:05,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:15:05,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 13:15:05,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865905220] [2020-10-13 13:15:05,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 13:15:05,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:15:05,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 13:15:05,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 13:15:05,178 INFO L87 Difference]: Start difference. First operand 109 states and 123 transitions. Second operand 18 states. [2020-10-13 13:15:05,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:15:05,347 INFO L93 Difference]: Finished difference Result 186 states and 214 transitions. [2020-10-13 13:15:05,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 13:15:05,348 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 178 [2020-10-13 13:15:05,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:15:05,349 INFO L225 Difference]: With dead ends: 186 [2020-10-13 13:15:05,349 INFO L226 Difference]: Without dead ends: 112 [2020-10-13 13:15:05,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 13:15:05,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-13 13:15:05,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-13 13:15:05,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-13 13:15:05,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 125 transitions. [2020-10-13 13:15:05,355 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 125 transitions. Word has length 178 [2020-10-13 13:15:05,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:15:05,355 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 125 transitions. [2020-10-13 13:15:05,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 13:15:05,356 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 125 transitions. [2020-10-13 13:15:05,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-13 13:15:05,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:15:05,357 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 15, 15, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:15:05,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 13:15:05,357 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:15:05,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:15:05,357 INFO L82 PathProgramCache]: Analyzing trace with hash 911055352, now seen corresponding path program 37 times [2020-10-13 13:15:05,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:15:05,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227527462] [2020-10-13 13:15:05,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:15:05,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:15:05,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:05,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:05,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:06,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:10,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:15:10,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 192 [2020-10-13 13:15:10,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:15:10,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-13 13:15:10,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:15:10,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 13:15:10,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 120 [2020-10-13 13:15:10,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 13:15:10,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:15:10,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:15:10,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:15:10,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:10,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:15:10,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:15:10,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:15:10,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:15:10,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:15:10,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:15:10,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:15:10,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:15:10,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:15:10,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-13 13:15:10,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:15:10,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:10,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:10,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:15:10,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 13:15:10,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:15:10,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-13 13:15:10,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:15:10,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:15:10,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:15:10,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:15:10,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:15:10,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-13 13:15:10,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:15:10,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:10,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:10,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:15:10,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 13:15:10,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:15:10,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-13 13:15:10,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:15:10,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:15:10,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:15:10,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:15:10,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:15:10,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-10-13 13:15:10,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:15:10,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:10,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:11,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:15:11,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 13:15:11,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:15:11,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-10-13 13:15:11,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:15:11,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:15:11,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 13:15:11,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:15:11,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:15:11,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1831 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1635 trivial. 0 not checked. [2020-10-13 13:15:11,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227527462] [2020-10-13 13:15:11,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:15:11,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 13:15:11,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894626595] [2020-10-13 13:15:11,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 13:15:11,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:15:11,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 13:15:11,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 13:15:11,178 INFO L87 Difference]: Start difference. First operand 111 states and 125 transitions. Second operand 18 states. [2020-10-13 13:15:11,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:15:11,339 INFO L93 Difference]: Finished difference Result 155 states and 180 transitions. [2020-10-13 13:15:11,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 13:15:11,340 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 180 [2020-10-13 13:15:11,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:15:11,341 INFO L225 Difference]: With dead ends: 155 [2020-10-13 13:15:11,341 INFO L226 Difference]: Without dead ends: 114 [2020-10-13 13:15:11,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 13:15:11,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-13 13:15:11,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-10-13 13:15:11,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-13 13:15:11,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 127 transitions. [2020-10-13 13:15:11,346 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 127 transitions. Word has length 180 [2020-10-13 13:15:11,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:15:11,347 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 127 transitions. [2020-10-13 13:15:11,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 13:15:11,347 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 127 transitions. [2020-10-13 13:15:11,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-13 13:15:11,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:15:11,348 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 15, 15, 15, 15, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:15:11,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 13:15:11,348 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:15:11,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:15:11,349 INFO L82 PathProgramCache]: Analyzing trace with hash -123510858, now seen corresponding path program 38 times [2020-10-13 13:15:11,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:15:11,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179974792] [2020-10-13 13:15:11,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:15:11,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:15:11,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:11,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:11,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:12,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:16,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:15:16,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-13 13:15:16,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:15:16,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-13 13:15:16,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:15:16,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 13:15:16,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:15:16,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 13:15:16,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:15:16,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:15:16,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:15:16,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:16,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:15:16,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:15:16,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:15:16,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:15:16,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:15:16,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:15:16,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:15:16,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:15:16,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:15:16,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-13 13:15:16,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:15:16,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:16,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:16,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:15:16,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 13:15:16,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:15:16,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 191 [2020-10-13 13:15:16,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:15:16,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:15:16,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 13:15:16,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:15:16,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:15:16,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-13 13:15:16,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:15:16,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:16,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:16,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:15:16,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 13:15:16,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:15:16,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-13 13:15:16,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:15:16,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:15:16,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 13:15:16,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:15:16,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:15:16,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-10-13 13:15:16,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:15:17,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:17,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:17,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:15:17,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 13:15:17,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:15:17,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-10-13 13:15:17,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:15:17,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:15:17,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 13:15:17,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:15:17,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:15:17,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1635 trivial. 0 not checked. [2020-10-13 13:15:17,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179974792] [2020-10-13 13:15:17,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:15:17,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 13:15:17,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810575837] [2020-10-13 13:15:17,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 13:15:17,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:15:17,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 13:15:17,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 13:15:17,257 INFO L87 Difference]: Start difference. First operand 113 states and 127 transitions. Second operand 19 states. [2020-10-13 13:15:17,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:15:17,389 INFO L93 Difference]: Finished difference Result 192 states and 220 transitions. [2020-10-13 13:15:17,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 13:15:17,390 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 182 [2020-10-13 13:15:17,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:15:17,390 INFO L225 Difference]: With dead ends: 192 [2020-10-13 13:15:17,390 INFO L226 Difference]: Without dead ends: 116 [2020-10-13 13:15:17,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 13:15:17,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-13 13:15:17,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-10-13 13:15:17,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-13 13:15:17,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 129 transitions. [2020-10-13 13:15:17,396 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 129 transitions. Word has length 182 [2020-10-13 13:15:17,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:15:17,396 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 129 transitions. [2020-10-13 13:15:17,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 13:15:17,396 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 129 transitions. [2020-10-13 13:15:17,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-10-13 13:15:17,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:15:17,397 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 16, 16, 15, 15, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:15:17,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 13:15:17,397 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:15:17,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:15:17,398 INFO L82 PathProgramCache]: Analyzing trace with hash 638817752, now seen corresponding path program 39 times [2020-10-13 13:15:17,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:15:17,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664671189] [2020-10-13 13:15:17,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:15:17,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:15:17,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:17,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:17,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:18,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:22,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:15:22,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 196 [2020-10-13 13:15:22,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:15:22,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-13 13:15:22,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:15:22,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 13:15:22,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 122 [2020-10-13 13:15:22,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 13:15:22,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:15:22,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:15:22,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:15:22,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:22,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:15:22,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:15:22,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:15:22,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 13:15:22,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:15:22,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:15:22,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:15:22,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:15:22,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:15:22,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-13 13:15:22,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:15:22,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:22,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:22,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:15:22,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 13:15:22,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:15:22,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-13 13:15:22,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:15:22,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:15:22,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:15:22,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:15:22,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:15:22,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-10-13 13:15:22,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:15:22,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:22,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:23,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:15:23,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 13:15:23,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:15:23,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 203 [2020-10-13 13:15:23,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:15:23,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:15:23,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:15:23,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:15:23,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:15:23,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2020-10-13 13:15:23,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:15:23,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:23,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:23,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:15:23,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 13:15:23,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:15:23,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 191 [2020-10-13 13:15:23,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:15:23,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:15:23,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 13:15:23,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:15:23,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:15:23,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1666 trivial. 0 not checked. [2020-10-13 13:15:23,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664671189] [2020-10-13 13:15:23,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:15:23,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 13:15:23,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20035355] [2020-10-13 13:15:23,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 13:15:23,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:15:23,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 13:15:23,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 13:15:23,246 INFO L87 Difference]: Start difference. First operand 115 states and 129 transitions. Second operand 19 states. [2020-10-13 13:15:23,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:15:23,371 INFO L93 Difference]: Finished difference Result 159 states and 184 transitions. [2020-10-13 13:15:23,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 13:15:23,371 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 184 [2020-10-13 13:15:23,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:15:23,373 INFO L225 Difference]: With dead ends: 159 [2020-10-13 13:15:23,373 INFO L226 Difference]: Without dead ends: 118 [2020-10-13 13:15:23,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 13:15:23,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-13 13:15:23,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-10-13 13:15:23,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-13 13:15:23,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 131 transitions. [2020-10-13 13:15:23,379 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 131 transitions. Word has length 184 [2020-10-13 13:15:23,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:15:23,380 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 131 transitions. [2020-10-13 13:15:23,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 13:15:23,380 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 131 transitions. [2020-10-13 13:15:23,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-13 13:15:23,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:15:23,381 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 16, 16, 16, 16, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:15:23,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 13:15:23,381 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:15:23,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:15:23,382 INFO L82 PathProgramCache]: Analyzing trace with hash 249160598, now seen corresponding path program 40 times [2020-10-13 13:15:23,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:15:23,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328548584] [2020-10-13 13:15:23,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:15:23,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:15:23,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:23,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:23,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:24,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:28,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:15:28,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 198 [2020-10-13 13:15:28,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:15:28,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-13 13:15:28,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:15:28,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 13:15:28,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-13 13:15:28,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 13:15:28,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:15:28,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:15:28,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:15:28,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:28,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:15:28,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:15:28,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:15:28,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 13:15:28,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:15:28,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:15:28,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:15:28,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:15:28,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:15:28,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-13 13:15:28,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:15:28,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:28,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:15:28,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 13:15:28,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:15:28,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-13 13:15:28,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:15:28,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 13:15:28,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 13:15:28,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 13:15:28,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:15:28,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-10-13 13:15:28,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:15:28,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:28,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:28,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:15:28,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 13:15:28,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:15:28,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-13 13:15:28,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:15:28,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:15:28,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 13:15:28,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:15:28,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:15:28,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-10-13 13:15:28,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:15:28,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:28,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:29,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:15:29,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 13:15:29,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 13:15:29,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-10-13 13:15:29,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:15:29,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:15:29,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 13:15:29,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:15:29,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:15:29,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 0 proven. 793 refuted. 0 times theorem prover too weak. 1129 trivial. 0 not checked. [2020-10-13 13:15:29,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328548584] [2020-10-13 13:15:29,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 13:15:29,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 13:15:29,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550440811] [2020-10-13 13:15:29,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 13:15:29,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:15:29,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 13:15:29,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 13:15:29,132 INFO L87 Difference]: Start difference. First operand 117 states and 131 transitions. Second operand 14 states. [2020-10-13 13:15:29,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:15:29,428 INFO L93 Difference]: Finished difference Result 199 states and 231 transitions. [2020-10-13 13:15:29,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 13:15:29,429 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 186 [2020-10-13 13:15:29,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:15:29,430 INFO L225 Difference]: With dead ends: 199 [2020-10-13 13:15:29,430 INFO L226 Difference]: Without dead ends: 122 [2020-10-13 13:15:29,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-10-13 13:15:29,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-13 13:15:29,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2020-10-13 13:15:29,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-13 13:15:29,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 135 transitions. [2020-10-13 13:15:29,436 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 135 transitions. Word has length 186 [2020-10-13 13:15:29,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:15:29,436 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 135 transitions. [2020-10-13 13:15:29,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 13:15:29,436 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 135 transitions. [2020-10-13 13:15:29,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-13 13:15:29,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:15:29,438 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 16, 16, 16, 16, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:15:29,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 13:15:29,438 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:15:29,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:15:29,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1509663873, now seen corresponding path program 41 times [2020-10-13 13:15:29,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:15:29,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033535680] [2020-10-13 13:15:29,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:15:29,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:15:29,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:29,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:29,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:15:30,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking...