/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/loops-crafted-1/theatreSquare.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 11:05:51,339 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 11:05:51,341 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 11:05:51,365 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 11:05:51,365 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 11:05:51,366 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 11:05:51,367 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 11:05:51,369 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 11:05:51,370 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 11:05:51,371 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 11:05:51,372 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 11:05:51,373 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 11:05:51,373 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 11:05:51,374 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 11:05:51,375 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 11:05:51,376 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 11:05:51,377 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 11:05:51,378 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 11:05:51,379 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 11:05:51,381 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 11:05:51,383 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 11:05:51,384 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 11:05:51,385 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 11:05:51,386 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 11:05:51,388 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 11:05:51,388 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 11:05:51,389 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 11:05:51,389 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 11:05:51,390 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 11:05:51,391 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 11:05:51,391 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 11:05:51,392 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 11:05:51,392 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 11:05:51,393 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 11:05:51,394 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 11:05:51,394 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 11:05:51,395 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 11:05:51,395 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 11:05:51,395 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 11:05:51,396 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 11:05:51,397 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 11:05:51,398 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 11:05:51,420 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 11:05:51,421 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 11:05:51,422 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 11:05:51,422 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 11:05:51,423 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 11:05:51,423 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 11:05:51,423 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 11:05:51,423 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 11:05:51,424 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 11:05:51,424 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 11:05:51,424 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 11:05:51,424 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 11:05:51,424 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 11:05:51,425 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 11:05:51,427 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 11:05:51,427 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 11:05:51,427 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 11:05:51,428 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 11:05:51,428 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 11:05:51,428 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 11:05:51,428 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 11:05:51,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 11:05:51,429 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 11:05:51,429 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 11:05:51,429 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 11:05:51,429 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 11:05:51,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 11:05:51,430 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 11:05:51,430 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 11:05:51,430 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 11:05:51,757 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 11:05:51,772 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 11:05:51,779 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 11:05:51,781 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 11:05:51,781 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 11:05:51,782 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/theatreSquare.c [2020-10-13 11:05:51,842 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/558261a3a/931d9516a8a24716ad55488fe3722f58/FLAGf29cbeb7c [2020-10-13 11:05:52,307 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 11:05:52,307 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/theatreSquare.c [2020-10-13 11:05:52,316 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/558261a3a/931d9516a8a24716ad55488fe3722f58/FLAGf29cbeb7c [2020-10-13 11:05:52,685 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/558261a3a/931d9516a8a24716ad55488fe3722f58 [2020-10-13 11:05:52,694 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 11:05:52,696 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 11:05:52,697 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 11:05:52,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 11:05:52,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 11:05:52,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:05:52" (1/1) ... [2020-10-13 11:05:52,704 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32e3ee29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:05:52, skipping insertion in model container [2020-10-13 11:05:52,705 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:05:52" (1/1) ... [2020-10-13 11:05:52,712 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 11:05:52,731 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 11:05:52,896 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 11:05:52,900 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 11:05:52,923 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 11:05:52,937 INFO L208 MainTranslator]: Completed translation [2020-10-13 11:05:52,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:05:52 WrapperNode [2020-10-13 11:05:52,938 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 11:05:52,938 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 11:05:52,939 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 11:05:52,939 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 11:05:53,035 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:05:52" (1/1) ... [2020-10-13 11:05:53,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:05:52" (1/1) ... [2020-10-13 11:05:53,042 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:05:52" (1/1) ... [2020-10-13 11:05:53,042 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:05:52" (1/1) ... [2020-10-13 11:05:53,047 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:05:52" (1/1) ... [2020-10-13 11:05:53,055 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:05:52" (1/1) ... [2020-10-13 11:05:53,057 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:05:52" (1/1) ... [2020-10-13 11:05:53,059 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 11:05:53,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 11:05:53,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 11:05:53,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 11:05:53,060 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:05:52" (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 11:05:53,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 11:05:53,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 11:05:53,122 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 11:05:53,123 INFO L138 BoogieDeclarations]: Found implementation of procedure correct_version [2020-10-13 11:05:53,123 INFO L138 BoogieDeclarations]: Found implementation of procedure student_version [2020-10-13 11:05:53,123 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 11:05:53,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 11:05:53,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 11:05:53,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 11:05:53,124 INFO L130 BoogieDeclarations]: Found specification of procedure correct_version [2020-10-13 11:05:53,125 INFO L130 BoogieDeclarations]: Found specification of procedure student_version [2020-10-13 11:05:53,125 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 11:05:53,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 11:05:53,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 11:05:53,374 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 11:05:53,375 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-13 11:05:53,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:05:53 BoogieIcfgContainer [2020-10-13 11:05:53,380 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 11:05:53,382 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 11:05:53,382 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 11:05:53,385 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 11:05:53,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:05:52" (1/3) ... [2020-10-13 11:05:53,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3817f6a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:05:53, skipping insertion in model container [2020-10-13 11:05:53,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:05:52" (2/3) ... [2020-10-13 11:05:53,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3817f6a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:05:53, skipping insertion in model container [2020-10-13 11:05:53,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:05:53" (3/3) ... [2020-10-13 11:05:53,388 INFO L109 eAbstractionObserver]: Analyzing ICFG theatreSquare.c [2020-10-13 11:05:53,400 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 11:05:53,407 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 11:05:53,423 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 11:05:53,461 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 11:05:53,461 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 11:05:53,461 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 11:05:53,461 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 11:05:53,461 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 11:05:53,461 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 11:05:53,462 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 11:05:53,462 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 11:05:53,502 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-13 11:05:53,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-13 11:05:53,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:05:53,511 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:05:53,511 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:05:53,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:05:53,517 INFO L82 PathProgramCache]: Analyzing trace with hash -962826499, now seen corresponding path program 1 times [2020-10-13 11:05:53,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:05:53,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185313589] [2020-10-13 11:05:53,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:05:53,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:53,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:53,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:53,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 11:05:53,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:53,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-13 11:05:53,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:53,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 11:05:53,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:05:53,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 11:05:53,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 11:05:53,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:05:53,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:53,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:53,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:53,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:05:53,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:53,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 11:05:53,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:53,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:05:53,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:05:53,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:05:53,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:05:53,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:05:53,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185313589] [2020-10-13 11:05:53,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:05:53,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 11:05:53,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749514268] [2020-10-13 11:05:53,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 11:05:53,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:05:53,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 11:05:53,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 11:05:53,906 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 5 states. [2020-10-13 11:05:54,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:05:54,001 INFO L93 Difference]: Finished difference Result 75 states and 102 transitions. [2020-10-13 11:05:54,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 11:05:54,004 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-13 11:05:54,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:05:54,017 INFO L225 Difference]: With dead ends: 75 [2020-10-13 11:05:54,018 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 11:05:54,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 11:05:54,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 11:05:54,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-13 11:05:54,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 11:05:54,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-10-13 11:05:54,096 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 10 [2020-10-13 11:05:54,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:05:54,096 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-10-13 11:05:54,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 11:05:54,097 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-10-13 11:05:54,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 11:05:54,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:05:54,099 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:05:54,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 11:05:54,100 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:05:54,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:05:54,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1083365074, now seen corresponding path program 1 times [2020-10-13 11:05:54,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:05:54,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053126948] [2020-10-13 11:05:54,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:05:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:54,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:54,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:54,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:54,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:54,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:55,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:55,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 11:05:55,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 11:05:55,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1225 [2020-10-13 11:05:55,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:55,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 11:05:55,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 11:05:55,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 11:05:55,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 11:05:55,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:05:55,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:55,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:55,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:55,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:05:55,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:55,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:05:55,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:55,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:05:55,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:05:55,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:05:55,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 11:05:55,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:05:55,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:55,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:55,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:55,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-13 11:05:55,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:55,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-13 11:05:55,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:55,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 11:05:55,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:05:55,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 11:05:55,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 11:05:55,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-13 11:05:55,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:55,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:55,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:55,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-13 11:05:55,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:55,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 11:05:55,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:55,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:05:55,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:05:55,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:05:55,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:55,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:05:55,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053126948] [2020-10-13 11:05:55,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:05:55,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 11:05:55,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240021671] [2020-10-13 11:05:55,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 11:05:55,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:05:55,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 11:05:55,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 11:05:55,550 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 5 states. [2020-10-13 11:05:55,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:05:55,597 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2020-10-13 11:05:55,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 11:05:55,598 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-10-13 11:05:55,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:05:55,599 INFO L225 Difference]: With dead ends: 54 [2020-10-13 11:05:55,599 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 11:05:55,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 11:05:55,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 11:05:55,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-13 11:05:55,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 11:05:55,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-10-13 11:05:55,616 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 30 [2020-10-13 11:05:55,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:05:55,616 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-10-13 11:05:55,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 11:05:55,617 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-10-13 11:05:55,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 11:05:55,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:05:55,619 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:05:55,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 11:05:55,619 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:05:55,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:05:55,620 INFO L82 PathProgramCache]: Analyzing trace with hash -474163511, now seen corresponding path program 1 times [2020-10-13 11:05:55,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:05:55,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1391392309] [2020-10-13 11:05:55,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:05:55,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:55,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:55,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:55,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:55,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:55,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:56,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:57,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:57,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 11:05:57,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 11:05:57,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1812 [2020-10-13 11:05:57,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:57,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 11:05:57,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:05:57,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 11:05:57,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:57,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:05:57,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:57,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:57,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:57,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:05:57,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:57,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:05:57,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:57,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:05:57,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:05:57,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:05:57,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:57,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:05:57,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:57,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:57,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:57,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-13 11:05:57,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:57,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 11:05:57,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:57,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 11:05:57,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:05:57,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 11:05:57,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:57,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 11:05:57,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:57,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:57,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:57,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-13 11:05:57,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:57,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 11:05:57,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:57,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:05:57,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:05:57,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:05:57,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:57,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:05:57,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1391392309] [2020-10-13 11:05:57,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:05:57,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 11:05:57,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149906314] [2020-10-13 11:05:57,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 11:05:57,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:05:57,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 11:05:57,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 11:05:57,520 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 5 states. [2020-10-13 11:05:57,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:05:57,551 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-10-13 11:05:57,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 11:05:57,552 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-10-13 11:05:57,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:05:57,553 INFO L225 Difference]: With dead ends: 52 [2020-10-13 11:05:57,553 INFO L226 Difference]: Without dead ends: 33 [2020-10-13 11:05:57,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 11:05:57,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-13 11:05:57,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-13 11:05:57,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 11:05:57,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-10-13 11:05:57,561 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 31 [2020-10-13 11:05:57,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:05:57,561 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-10-13 11:05:57,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 11:05:57,561 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-10-13 11:05:57,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 11:05:57,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:05:57,563 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:05:57,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 11:05:57,563 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:05:57,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:05:57,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1232400994, now seen corresponding path program 1 times [2020-10-13 11:05:57,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:05:57,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472101415] [2020-10-13 11:05:57,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:05:57,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:57,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:57,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:57,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:57,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:57,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:58,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:58,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 11:05:58,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 11:05:58,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 916 [2020-10-13 11:05:58,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:58,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 11:05:58,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 11:05:58,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 11:05:58,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:58,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:05:58,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:58,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:58,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:58,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:05:58,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:58,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:05:58,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:58,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:05:58,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:05:58,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:05:58,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:58,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:05:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:58,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:58,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:58,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-13 11:05:58,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:58,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 11:05:58,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:58,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 11:05:58,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:05:58,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 11:05:58,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:58,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-13 11:05:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:58,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:58,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:58,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-13 11:05:58,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:58,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 11:05:58,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:58,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:05:58,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:05:58,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:05:58,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:58,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:05:58,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472101415] [2020-10-13 11:05:58,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:05:58,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 11:05:58,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033060549] [2020-10-13 11:05:58,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 11:05:58,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:05:58,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 11:05:58,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 11:05:58,571 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 5 states. [2020-10-13 11:05:58,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:05:58,602 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2020-10-13 11:05:58,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 11:05:58,603 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2020-10-13 11:05:58,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:05:58,604 INFO L225 Difference]: With dead ends: 56 [2020-10-13 11:05:58,604 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 11:05:58,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 11:05:58,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 11:05:58,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-13 11:05:58,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 11:05:58,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-10-13 11:05:58,612 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 32 [2020-10-13 11:05:58,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:05:58,612 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-10-13 11:05:58,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 11:05:58,612 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-10-13 11:05:58,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 11:05:58,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:05:58,613 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:05:58,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 11:05:58,614 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:05:58,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:05:58,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1767867608, now seen corresponding path program 1 times [2020-10-13 11:05:58,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:05:58,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106393662] [2020-10-13 11:05:58,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:05:58,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:58,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:58,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:58,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:58,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:58,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:58,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 11:05:58,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 11:05:58,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 369 [2020-10-13 11:05:58,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:58,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 11:05:58,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:05:58,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 11:05:58,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:59,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:05:59,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:59,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:59,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:59,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:05:59,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:59,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:05:59,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:59,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:05:59,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:05:59,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:05:59,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:59,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:05:59,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:59,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:59,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:59,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 11:05:59,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:59,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-13 11:05:59,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:59,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 11:05:59,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:05:59,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 11:05:59,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:05:59,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-13 11:05:59,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:59,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:59,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:59,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-13 11:05:59,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:59,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 11:05:59,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:59,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 11:05:59,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:05:59,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 11:05:59,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:59,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:05:59,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106393662] [2020-10-13 11:05:59,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:05:59,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 11:05:59,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566796084] [2020-10-13 11:05:59,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 11:05:59,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:05:59,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 11:05:59,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 11:05:59,115 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 7 states. [2020-10-13 11:05:59,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:05:59,183 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2020-10-13 11:05:59,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 11:05:59,184 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-10-13 11:05:59,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:05:59,185 INFO L225 Difference]: With dead ends: 47 [2020-10-13 11:05:59,185 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 11:05:59,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-13 11:05:59,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 11:05:59,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-13 11:05:59,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 11:05:59,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-10-13 11:05:59,192 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 33 [2020-10-13 11:05:59,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:05:59,193 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-10-13 11:05:59,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 11:05:59,193 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-10-13 11:05:59,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 11:05:59,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:05:59,194 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:05:59,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 11:05:59,194 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:05:59,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:05:59,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1022728314, now seen corresponding path program 1 times [2020-10-13 11:05:59,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:05:59,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413278097] [2020-10-13 11:05:59,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:05:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:59,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:59,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:59,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:59,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:59,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 11:05:59,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:05:59,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 322 [2020-10-13 11:05:59,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:59,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 11:05:59,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 11:05:59,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 11:05:59,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:05:59,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:05:59,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:59,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:59,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:59,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:05:59,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:59,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:05:59,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:59,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:05:59,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:05:59,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:05:59,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:05:59,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:05:59,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:59,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:59,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:59,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 11:05:59,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:59,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 11:05:59,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:59,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:05:59,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:05:59,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:05:59,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:59,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-13 11:05:59,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:59,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:59,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:59,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-13 11:05:59,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:59,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 11:05:59,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:59,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 11:05:59,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:05:59,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 11:05:59,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:05:59,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 11:05:59,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413278097] [2020-10-13 11:05:59,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:05:59,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 11:05:59,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517303661] [2020-10-13 11:05:59,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 11:05:59,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:05:59,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 11:05:59,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 11:05:59,617 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 5 states. [2020-10-13 11:05:59,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:05:59,656 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-10-13 11:05:59,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 11:05:59,659 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-10-13 11:05:59,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:05:59,660 INFO L225 Difference]: With dead ends: 45 [2020-10-13 11:05:59,660 INFO L226 Difference]: Without dead ends: 36 [2020-10-13 11:05:59,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 11:05:59,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-13 11:05:59,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-13 11:05:59,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 11:05:59,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-10-13 11:05:59,671 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 34 [2020-10-13 11:05:59,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:05:59,674 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-10-13 11:05:59,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 11:05:59,674 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-10-13 11:05:59,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 11:05:59,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:05:59,675 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:05:59,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 11:05:59,675 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:05:59,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:05:59,676 INFO L82 PathProgramCache]: Analyzing trace with hash -321823208, now seen corresponding path program 1 times [2020-10-13 11:05:59,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:05:59,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357253623] [2020-10-13 11:05:59,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:05:59,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:59,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:59,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:59,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:59,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 11:05:59,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:05:59,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-13 11:05:59,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:59,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 11:05:59,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:05:59,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 11:05:59,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:59,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:05:59,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:59,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:59,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:59,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:05:59,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:59,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:05:59,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:59,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:05:59,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:05:59,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:05:59,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:59,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:05:59,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:59,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:59,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:59,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 11:05:59,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:59,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-13 11:05:59,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:59,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 11:05:59,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:05:59,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 11:05:59,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:59,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-13 11:05:59,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:59,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:59,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:59,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-13 11:05:59,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:59,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 11:05:59,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:59,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 11:05:59,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:05:59,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 11:05:59,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:59,981 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 11:05:59,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357253623] [2020-10-13 11:05:59,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:05:59,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 11:05:59,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885765588] [2020-10-13 11:05:59,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 11:05:59,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:05:59,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 11:05:59,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 11:05:59,984 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 7 states. [2020-10-13 11:06:00,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:00,058 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-10-13 11:06:00,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 11:06:00,061 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-10-13 11:06:00,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:00,062 INFO L225 Difference]: With dead ends: 49 [2020-10-13 11:06:00,062 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 11:06:00,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-13 11:06:00,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 11:06:00,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-13 11:06:00,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 11:06:00,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-13 11:06:00,074 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 35 [2020-10-13 11:06:00,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:00,074 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-13 11:06:00,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 11:06:00,075 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-13 11:06:00,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 11:06:00,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:00,076 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:06:00,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 11:06:00,076 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:00,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:00,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1421856711, now seen corresponding path program 1 times [2020-10-13 11:06:00,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:00,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162207595] [2020-10-13 11:06:00,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:00,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:00,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:00,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:00,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 11:06:00,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:00,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 232 [2020-10-13 11:06:00,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:00,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 11:06:00,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:06:00,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 11:06:00,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:00,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:00,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:00,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:00,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:00,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:00,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:00,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:00,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:00,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:00,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:00,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:00,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:00,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:00,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:00,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:00,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:00,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 11:06:00,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:00,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-13 11:06:00,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:00,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 11:06:00,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:00,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 11:06:00,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:00,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-13 11:06:00,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:00,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:00,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:00,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 11:06:00,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:00,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-13 11:06:00,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:00,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 11:06:00,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:00,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 11:06:00,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:00,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:06:00,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162207595] [2020-10-13 11:06:00,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:00,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 11:06:00,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811624635] [2020-10-13 11:06:00,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 11:06:00,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:00,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 11:06:00,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-13 11:06:00,679 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 18 states. [2020-10-13 11:06:01,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:01,112 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2020-10-13 11:06:01,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 11:06:01,113 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 36 [2020-10-13 11:06:01,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:01,117 INFO L225 Difference]: With dead ends: 69 [2020-10-13 11:06:01,117 INFO L226 Difference]: Without dead ends: 63 [2020-10-13 11:06:01,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2020-10-13 11:06:01,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-13 11:06:01,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2020-10-13 11:06:01,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 11:06:01,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2020-10-13 11:06:01,132 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 36 [2020-10-13 11:06:01,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:01,132 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2020-10-13 11:06:01,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 11:06:01,133 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2020-10-13 11:06:01,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 11:06:01,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:01,135 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:06:01,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 11:06:01,135 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:01,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:01,135 INFO L82 PathProgramCache]: Analyzing trace with hash -473230434, now seen corresponding path program 2 times [2020-10-13 11:06:01,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:01,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768432607] [2020-10-13 11:06:01,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:01,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:01,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:01,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:01,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 11:06:01,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:01,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-13 11:06:01,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:01,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 11:06:01,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:06:01,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 11:06:01,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:01,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:01,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:01,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:01,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:01,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:01,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:01,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:06:01,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:01,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:01,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:01,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:01,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:01,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:01,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:01,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:01,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:01,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-13 11:06:01,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:01,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-13 11:06:01,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:01,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 11:06:01,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:06:01,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 11:06:01,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:01,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-13 11:06:01,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:01,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:01,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:01,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 11:06:01,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:01,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 11:06:01,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:01,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:01,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:06:01,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:01,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:01,303 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 11:06:01,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768432607] [2020-10-13 11:06:01,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:01,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 11:06:01,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780069516] [2020-10-13 11:06:01,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 11:06:01,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:01,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 11:06:01,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 11:06:01,305 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand 6 states. [2020-10-13 11:06:01,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:01,347 INFO L93 Difference]: Finished difference Result 99 states and 119 transitions. [2020-10-13 11:06:01,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 11:06:01,347 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-10-13 11:06:01,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:01,349 INFO L225 Difference]: With dead ends: 99 [2020-10-13 11:06:01,349 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 11:06:01,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-10-13 11:06:01,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 11:06:01,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2020-10-13 11:06:01,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 11:06:01,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-10-13 11:06:01,360 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 37 [2020-10-13 11:06:01,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:01,360 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-10-13 11:06:01,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 11:06:01,360 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-10-13 11:06:01,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 11:06:01,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:01,362 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:06:01,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 11:06:01,362 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:01,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:01,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1205452345, now seen corresponding path program 3 times [2020-10-13 11:06:01,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:01,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480189461] [2020-10-13 11:06:01,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:01,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:01,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:01,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:01,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 11:06:01,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:01,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-13 11:06:01,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:01,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 11:06:01,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 11:06:01,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 11:06:01,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:01,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:01,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:01,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:01,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:01,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:01,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:01,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:01,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:01,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:01,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:01,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:01,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:01,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:01,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:01,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:01,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:01,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 11:06:01,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:01,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 11:06:01,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:01,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:01,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:01,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:01,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:01,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-13 11:06:01,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:01,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:01,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:01,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-13 11:06:01,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:01,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-13 11:06:01,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:01,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 11:06:01,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:06:01,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 11:06:01,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:01,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 11:06:01,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480189461] [2020-10-13 11:06:01,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:01,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 11:06:01,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568769554] [2020-10-13 11:06:01,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 11:06:01,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:01,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 11:06:01,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 11:06:01,527 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 6 states. [2020-10-13 11:06:01,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:01,565 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2020-10-13 11:06:01,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 11:06:01,566 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-10-13 11:06:01,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:01,567 INFO L225 Difference]: With dead ends: 89 [2020-10-13 11:06:01,567 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 11:06:01,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-10-13 11:06:01,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 11:06:01,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 73. [2020-10-13 11:06:01,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 11:06:01,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2020-10-13 11:06:01,578 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 37 [2020-10-13 11:06:01,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:01,578 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2020-10-13 11:06:01,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 11:06:01,579 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2020-10-13 11:06:01,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 11:06:01,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:01,580 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:06:01,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 11:06:01,580 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:01,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:01,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1163156936, now seen corresponding path program 4 times [2020-10-13 11:06:01,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:01,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900032116] [2020-10-13 11:06:01,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:01,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:01,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:01,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:01,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 11:06:01,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:01,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-13 11:06:01,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:01,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 11:06:01,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:06:01,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 11:06:01,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:01,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:01,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:01,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:01,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:01,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:01,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:01,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:01,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:01,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:01,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:01,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:01,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:01,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:01,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:01,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:01,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:01,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 11:06:01,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:01,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-13 11:06:01,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:01,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 11:06:01,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:01,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 11:06:01,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:01,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-13 11:06:01,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:01,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:01,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:01,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-13 11:06:01,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:01,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-13 11:06:01,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:01,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 11:06:01,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:06:01,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 11:06:01,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:06:01,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 11:06:01,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900032116] [2020-10-13 11:06:01,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:01,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 11:06:01,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170680484] [2020-10-13 11:06:01,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 11:06:01,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:01,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 11:06:01,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 11:06:01,860 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand 9 states. [2020-10-13 11:06:01,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:01,979 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2020-10-13 11:06:01,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 11:06:01,980 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-10-13 11:06:01,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:01,981 INFO L225 Difference]: With dead ends: 91 [2020-10-13 11:06:01,981 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 11:06:01,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-13 11:06:01,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 11:06:01,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2020-10-13 11:06:01,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 11:06:01,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 103 transitions. [2020-10-13 11:06:01,993 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 103 transitions. Word has length 37 [2020-10-13 11:06:01,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:01,993 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 103 transitions. [2020-10-13 11:06:01,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 11:06:01,993 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 103 transitions. [2020-10-13 11:06:01,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 11:06:01,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:01,995 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:06:01,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 11:06:01,995 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:01,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:01,996 INFO L82 PathProgramCache]: Analyzing trace with hash -229775873, now seen corresponding path program 5 times [2020-10-13 11:06:01,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:01,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686249728] [2020-10-13 11:06:01,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:02,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:02,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:02,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:02,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 11:06:02,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:02,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-13 11:06:02,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:02,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 11:06:02,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:06:02,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 11:06:02,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:02,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:02,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:02,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:02,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:02,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:02,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:02,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:02,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:02,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:02,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:02,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:02,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:02,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:02,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:02,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:02,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:02,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-13 11:06:02,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:02,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-13 11:06:02,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:02,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 11:06:02,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:02,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 11:06:02,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:02,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-13 11:06:02,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:02,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:02,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:02,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 11:06:02,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:02,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-13 11:06:02,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:02,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 11:06:02,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:06:02,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 11:06:02,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:02,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 11:06:02,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686249728] [2020-10-13 11:06:02,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:02,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 11:06:02,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391897884] [2020-10-13 11:06:02,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 11:06:02,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:02,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 11:06:02,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 11:06:02,287 INFO L87 Difference]: Start difference. First operand 83 states and 103 transitions. Second operand 9 states. [2020-10-13 11:06:02,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:02,389 INFO L93 Difference]: Finished difference Result 91 states and 110 transitions. [2020-10-13 11:06:02,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 11:06:02,390 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-10-13 11:06:02,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:02,391 INFO L225 Difference]: With dead ends: 91 [2020-10-13 11:06:02,391 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 11:06:02,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-13 11:06:02,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 11:06:02,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2020-10-13 11:06:02,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 11:06:02,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2020-10-13 11:06:02,401 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 37 [2020-10-13 11:06:02,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:02,401 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2020-10-13 11:06:02,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 11:06:02,402 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2020-10-13 11:06:02,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 11:06:02,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:02,403 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:06:02,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 11:06:02,403 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:02,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:02,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1490805387, now seen corresponding path program 6 times [2020-10-13 11:06:02,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:02,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362859905] [2020-10-13 11:06:02,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:02,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:02,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:02,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:02,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 11:06:02,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:02,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-13 11:06:02,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:02,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 11:06:02,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:06:02,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 11:06:02,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:02,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:02,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:02,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:02,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:02,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:02,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:02,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:02,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:02,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:02,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:02,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:02,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:02,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:02,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:02,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:02,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:02,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 11:06:02,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:02,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-13 11:06:02,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:02,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 11:06:02,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:02,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 11:06:02,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:02,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-13 11:06:02,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:02,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:02,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:02,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 11:06:02,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:02,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-13 11:06:02,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:02,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 11:06:02,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:06:02,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 11:06:02,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:02,691 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 11:06:02,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362859905] [2020-10-13 11:06:02,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:02,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 11:06:02,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851702439] [2020-10-13 11:06:02,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 11:06:02,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:02,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 11:06:02,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 11:06:02,694 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand 9 states. [2020-10-13 11:06:02,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:02,814 INFO L93 Difference]: Finished difference Result 107 states and 127 transitions. [2020-10-13 11:06:02,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 11:06:02,815 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-10-13 11:06:02,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:02,816 INFO L225 Difference]: With dead ends: 107 [2020-10-13 11:06:02,817 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 11:06:02,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-13 11:06:02,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 11:06:02,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2020-10-13 11:06:02,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 11:06:02,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 106 transitions. [2020-10-13 11:06:02,829 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 106 transitions. Word has length 38 [2020-10-13 11:06:02,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:02,830 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 106 transitions. [2020-10-13 11:06:02,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 11:06:02,830 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 106 transitions. [2020-10-13 11:06:02,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 11:06:02,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:02,832 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:06:02,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 11:06:02,832 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:02,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:02,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1431610674, now seen corresponding path program 7 times [2020-10-13 11:06:02,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:02,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867768300] [2020-10-13 11:06:02,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:02,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:02,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:03,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:03,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 11:06:03,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:03,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 338 [2020-10-13 11:06:03,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:03,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 11:06:03,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:06:03,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 11:06:03,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:03,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:03,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:03,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:03,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:03,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:03,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:03,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:03,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:03,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:03,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:03,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:03,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:03,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:03,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:03,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:03,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:03,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-13 11:06:03,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:03,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-13 11:06:03,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:03,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 11:06:03,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:03,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 11:06:03,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:03,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-13 11:06:03,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:03,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:03,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:03,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-13 11:06:03,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:03,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-13 11:06:03,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:03,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 11:06:03,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:03,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 11:06:03,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:03,609 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:06:03,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867768300] [2020-10-13 11:06:03,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:03,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 11:06:03,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478123986] [2020-10-13 11:06:03,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 11:06:03,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:03,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 11:06:03,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-13 11:06:03,611 INFO L87 Difference]: Start difference. First operand 88 states and 106 transitions. Second operand 20 states. [2020-10-13 11:06:04,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:04,020 INFO L93 Difference]: Finished difference Result 136 states and 169 transitions. [2020-10-13 11:06:04,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 11:06:04,021 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2020-10-13 11:06:04,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:04,022 INFO L225 Difference]: With dead ends: 136 [2020-10-13 11:06:04,022 INFO L226 Difference]: Without dead ends: 130 [2020-10-13 11:06:04,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2020-10-13 11:06:04,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-13 11:06:04,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 120. [2020-10-13 11:06:04,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-13 11:06:04,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 148 transitions. [2020-10-13 11:06:04,036 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 148 transitions. Word has length 38 [2020-10-13 11:06:04,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:04,037 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 148 transitions. [2020-10-13 11:06:04,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 11:06:04,037 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 148 transitions. [2020-10-13 11:06:04,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 11:06:04,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:04,038 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:06:04,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 11:06:04,039 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:04,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:04,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1770618937, now seen corresponding path program 8 times [2020-10-13 11:06:04,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:04,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815228072] [2020-10-13 11:06:04,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:04,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:04,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:04,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:04,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 11:06:04,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:04,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-13 11:06:04,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:04,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 11:06:04,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:06:04,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 11:06:04,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:04,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:04,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:04,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:04,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:04,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:04,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:04,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:04,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:04,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:04,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:04,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:04,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:04,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:04,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:04,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:04,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:04,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 11:06:04,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:04,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-13 11:06:04,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:04,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 11:06:04,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:04,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 11:06:04,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:04,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-13 11:06:04,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:04,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:04,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:04,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 11:06:04,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:04,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-13 11:06:04,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:04,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 11:06:04,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:06:04,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 11:06:04,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:06:04,349 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 11:06:04,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815228072] [2020-10-13 11:06:04,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:04,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 11:06:04,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782802322] [2020-10-13 11:06:04,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 11:06:04,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:04,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 11:06:04,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 11:06:04,352 INFO L87 Difference]: Start difference. First operand 120 states and 148 transitions. Second operand 9 states. [2020-10-13 11:06:04,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:04,444 INFO L93 Difference]: Finished difference Result 131 states and 158 transitions. [2020-10-13 11:06:04,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 11:06:04,445 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-10-13 11:06:04,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:04,447 INFO L225 Difference]: With dead ends: 131 [2020-10-13 11:06:04,447 INFO L226 Difference]: Without dead ends: 119 [2020-10-13 11:06:04,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-13 11:06:04,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-13 11:06:04,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2020-10-13 11:06:04,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-13 11:06:04,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2020-10-13 11:06:04,467 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 38 [2020-10-13 11:06:04,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:04,467 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2020-10-13 11:06:04,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 11:06:04,468 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2020-10-13 11:06:04,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 11:06:04,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:04,471 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:06:04,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 11:06:04,471 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:04,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:04,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1394986079, now seen corresponding path program 9 times [2020-10-13 11:06:04,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:04,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928866404] [2020-10-13 11:06:04,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:04,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:04,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:04,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:04,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 11:06:04,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:04,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-13 11:06:04,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:04,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 11:06:04,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:06:04,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 11:06:04,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:04,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:04,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:04,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:04,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:04,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:04,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:04,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:06:04,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:04,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:04,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:04,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:04,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:04,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:04,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:04,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:04,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:04,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-13 11:06:04,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:04,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-13 11:06:04,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:04,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 11:06:04,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:04,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 11:06:04,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:04,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-13 11:06:04,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:04,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:04,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:04,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 11:06:04,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:04,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-13 11:06:04,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:04,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 11:06:04,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:06:04,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 11:06:04,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:04,885 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 11:06:04,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928866404] [2020-10-13 11:06:04,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:04,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 11:06:04,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491571134] [2020-10-13 11:06:04,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 11:06:04,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:04,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 11:06:04,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-13 11:06:04,889 INFO L87 Difference]: Start difference. First operand 117 states and 141 transitions. Second operand 11 states. [2020-10-13 11:06:05,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:05,062 INFO L93 Difference]: Finished difference Result 135 states and 164 transitions. [2020-10-13 11:06:05,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 11:06:05,062 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-10-13 11:06:05,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:05,064 INFO L225 Difference]: With dead ends: 135 [2020-10-13 11:06:05,064 INFO L226 Difference]: Without dead ends: 121 [2020-10-13 11:06:05,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-13 11:06:05,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-13 11:06:05,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 112. [2020-10-13 11:06:05,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 11:06:05,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 137 transitions. [2020-10-13 11:06:05,078 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 137 transitions. Word has length 39 [2020-10-13 11:06:05,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:05,079 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 137 transitions. [2020-10-13 11:06:05,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 11:06:05,080 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 137 transitions. [2020-10-13 11:06:05,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 11:06:05,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:05,081 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:06:05,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 11:06:05,082 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:05,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:05,082 INFO L82 PathProgramCache]: Analyzing trace with hash 265027960, now seen corresponding path program 10 times [2020-10-13 11:06:05,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:05,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133362571] [2020-10-13 11:06:05,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:05,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:05,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:05,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:05,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 11:06:05,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:05,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-13 11:06:05,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:05,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 11:06:05,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:06:05,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 11:06:05,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:05,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:05,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:05,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:05,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:05,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:05,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:05,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:05,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:05,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:05,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:05,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:05,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:05,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:05,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:05,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:05,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:05,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 11:06:05,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:05,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-13 11:06:05,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:05,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 11:06:05,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:05,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 11:06:05,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:05,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-13 11:06:05,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:05,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:05,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:05,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-13 11:06:05,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:05,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-13 11:06:05,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:05,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 11:06:05,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:06:05,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 11:06:05,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:05,463 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 11:06:05,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133362571] [2020-10-13 11:06:05,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:05,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 11:06:05,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532147266] [2020-10-13 11:06:05,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 11:06:05,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:05,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 11:06:05,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-13 11:06:05,466 INFO L87 Difference]: Start difference. First operand 112 states and 137 transitions. Second operand 11 states. [2020-10-13 11:06:05,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:05,635 INFO L93 Difference]: Finished difference Result 127 states and 152 transitions. [2020-10-13 11:06:05,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 11:06:05,635 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-10-13 11:06:05,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:05,637 INFO L225 Difference]: With dead ends: 127 [2020-10-13 11:06:05,637 INFO L226 Difference]: Without dead ends: 115 [2020-10-13 11:06:05,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-13 11:06:05,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-13 11:06:05,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2020-10-13 11:06:05,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-13 11:06:05,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 136 transitions. [2020-10-13 11:06:05,651 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 136 transitions. Word has length 39 [2020-10-13 11:06:05,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:05,652 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 136 transitions. [2020-10-13 11:06:05,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 11:06:05,652 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 136 transitions. [2020-10-13 11:06:05,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 11:06:05,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:05,654 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:06:05,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 11:06:05,654 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:05,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:05,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1907547097, now seen corresponding path program 11 times [2020-10-13 11:06:05,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:05,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520418419] [2020-10-13 11:06:05,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:05,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:05,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:05,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:05,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 11:06:05,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:05,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-13 11:06:05,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:05,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 11:06:05,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 11:06:05,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 11:06:05,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:05,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:05,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:05,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:05,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:05,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:05,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:05,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:05,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:05,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:05,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:05,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:05,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:05,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:05,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:05,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:05,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:05,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 11:06:05,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:05,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-13 11:06:05,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:05,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:05,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:05,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:05,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:05,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-13 11:06:05,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:05,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:05,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:05,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-13 11:06:05,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:05,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-13 11:06:05,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:05,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 11:06:05,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:06:05,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 11:06:05,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:05,866 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 11:06:05,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520418419] [2020-10-13 11:06:05,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:05,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 11:06:05,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156064820] [2020-10-13 11:06:05,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 11:06:05,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:05,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 11:06:05,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 11:06:05,872 INFO L87 Difference]: Start difference. First operand 113 states and 136 transitions. Second operand 7 states. [2020-10-13 11:06:05,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:05,933 INFO L93 Difference]: Finished difference Result 123 states and 146 transitions. [2020-10-13 11:06:05,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 11:06:05,933 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 39 [2020-10-13 11:06:05,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:05,934 INFO L225 Difference]: With dead ends: 123 [2020-10-13 11:06:05,935 INFO L226 Difference]: Without dead ends: 108 [2020-10-13 11:06:05,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-10-13 11:06:05,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-13 11:06:05,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 96. [2020-10-13 11:06:05,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-13 11:06:05,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 113 transitions. [2020-10-13 11:06:05,950 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 113 transitions. Word has length 39 [2020-10-13 11:06:05,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:05,950 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 113 transitions. [2020-10-13 11:06:05,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 11:06:05,950 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 113 transitions. [2020-10-13 11:06:05,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 11:06:05,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:05,951 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:06:05,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 11:06:05,951 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:05,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:05,952 INFO L82 PathProgramCache]: Analyzing trace with hash -73532542, now seen corresponding path program 12 times [2020-10-13 11:06:05,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:05,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838343834] [2020-10-13 11:06:05,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:05,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:05,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:06,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:06,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 11:06:06,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:06,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-13 11:06:06,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:06,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 11:06:06,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:06:06,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 11:06:06,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:06,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:06,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:06,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:06,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:06,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:06,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:06,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:06,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:06,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:06,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:06,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:06,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:06,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:06,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:06,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:06,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:06,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-13 11:06:06,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:06,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-13 11:06:06,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:06,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 11:06:06,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:06:06,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 11:06:06,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:06,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-13 11:06:06,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:06,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:06,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:06,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 11:06:06,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:06,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 11:06:06,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:06,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:06,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:06:06,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:06,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:06,140 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 11:06:06,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838343834] [2020-10-13 11:06:06,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:06,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 11:06:06,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039645826] [2020-10-13 11:06:06,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 11:06:06,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:06,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 11:06:06,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 11:06:06,144 INFO L87 Difference]: Start difference. First operand 96 states and 113 transitions. Second operand 7 states. [2020-10-13 11:06:06,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:06,201 INFO L93 Difference]: Finished difference Result 159 states and 186 transitions. [2020-10-13 11:06:06,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 11:06:06,202 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 39 [2020-10-13 11:06:06,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:06,203 INFO L225 Difference]: With dead ends: 159 [2020-10-13 11:06:06,204 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 11:06:06,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-10-13 11:06:06,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 11:06:06,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-10-13 11:06:06,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-13 11:06:06,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 116 transitions. [2020-10-13 11:06:06,215 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 116 transitions. Word has length 39 [2020-10-13 11:06:06,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:06,216 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 116 transitions. [2020-10-13 11:06:06,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 11:06:06,216 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 116 transitions. [2020-10-13 11:06:06,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 11:06:06,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:06,217 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:06:06,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 11:06:06,217 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:06,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:06,217 INFO L82 PathProgramCache]: Analyzing trace with hash -409339687, now seen corresponding path program 13 times [2020-10-13 11:06:06,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:06,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493236239] [2020-10-13 11:06:06,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:06,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:06,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:06,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:06,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 11:06:06,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:06,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 301 [2020-10-13 11:06:06,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:06,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 11:06:06,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:06:06,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 11:06:06,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:06,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:06,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:06,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:06,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:06,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:06,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:06,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:06,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:06,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:06,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:06,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:06,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:06,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:06,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:06,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:06,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:06,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 11:06:06,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:06,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-13 11:06:06,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:06,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 11:06:06,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:06,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 11:06:06,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:06,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-13 11:06:06,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:06,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:06,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:06,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 11:06:06,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:06,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-13 11:06:06,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:06,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 11:06:06,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:06,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 11:06:06,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:06,993 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:06:06,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493236239] [2020-10-13 11:06:06,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:06,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 11:06:06,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471505888] [2020-10-13 11:06:06,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 11:06:06,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:06,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 11:06:06,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-13 11:06:06,996 INFO L87 Difference]: Start difference. First operand 99 states and 116 transitions. Second operand 22 states. [2020-10-13 11:06:07,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:07,518 INFO L93 Difference]: Finished difference Result 139 states and 163 transitions. [2020-10-13 11:06:07,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 11:06:07,519 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 40 [2020-10-13 11:06:07,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:07,520 INFO L225 Difference]: With dead ends: 139 [2020-10-13 11:06:07,520 INFO L226 Difference]: Without dead ends: 133 [2020-10-13 11:06:07,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=907, Unknown=0, NotChecked=0, Total=992 [2020-10-13 11:06:07,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-13 11:06:07,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 115. [2020-10-13 11:06:07,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-13 11:06:07,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 135 transitions. [2020-10-13 11:06:07,538 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 135 transitions. Word has length 40 [2020-10-13 11:06:07,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:07,539 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 135 transitions. [2020-10-13 11:06:07,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 11:06:07,539 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 135 transitions. [2020-10-13 11:06:07,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 11:06:07,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:07,540 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:06:07,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 11:06:07,540 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:07,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:07,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1337755289, now seen corresponding path program 14 times [2020-10-13 11:06:07,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:07,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631865188] [2020-10-13 11:06:07,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:07,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:07,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:07,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:07,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 11:06:07,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:07,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 304 [2020-10-13 11:06:07,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:07,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 11:06:07,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:06:07,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 11:06:07,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:06:07,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:07,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:07,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:07,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:07,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:07,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:07,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:07,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:07,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:07,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:07,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:07,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:07,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:07,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:07,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:07,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:07,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 11:06:07,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:07,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-13 11:06:07,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:07,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 11:06:07,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:07,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 11:06:07,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:08,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-13 11:06:08,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:08,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:08,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:08,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 11:06:08,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:08,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-13 11:06:08,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:08,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 11:06:08,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:08,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 11:06:08,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:08,276 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 11:06:08,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631865188] [2020-10-13 11:06:08,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:08,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 11:06:08,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602789615] [2020-10-13 11:06:08,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 11:06:08,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:08,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 11:06:08,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-13 11:06:08,279 INFO L87 Difference]: Start difference. First operand 115 states and 135 transitions. Second operand 20 states. [2020-10-13 11:06:08,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:08,765 INFO L93 Difference]: Finished difference Result 133 states and 156 transitions. [2020-10-13 11:06:08,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 11:06:08,767 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 40 [2020-10-13 11:06:08,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:08,768 INFO L225 Difference]: With dead ends: 133 [2020-10-13 11:06:08,768 INFO L226 Difference]: Without dead ends: 127 [2020-10-13 11:06:08,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2020-10-13 11:06:08,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-13 11:06:08,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2020-10-13 11:06:08,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-13 11:06:08,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 148 transitions. [2020-10-13 11:06:08,783 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 148 transitions. Word has length 40 [2020-10-13 11:06:08,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:08,784 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 148 transitions. [2020-10-13 11:06:08,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 11:06:08,784 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 148 transitions. [2020-10-13 11:06:08,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 11:06:08,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:08,785 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:06:08,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 11:06:08,785 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:08,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:08,786 INFO L82 PathProgramCache]: Analyzing trace with hash 160099736, now seen corresponding path program 15 times [2020-10-13 11:06:08,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:08,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932558506] [2020-10-13 11:06:08,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:08,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:08,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:08,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:08,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 11:06:08,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:08,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-10-13 11:06:08,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:08,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 11:06:08,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:06:08,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 11:06:08,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:08,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:08,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:08,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:08,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:08,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:08,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:08,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:08,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:08,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:08,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:08,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:08,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:08,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:08,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:08,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:09,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:09,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 11:06:09,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:09,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-13 11:06:09,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:09,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 11:06:09,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:09,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 11:06:09,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:09,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-13 11:06:09,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:09,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:09,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:09,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 11:06:09,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:09,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-13 11:06:09,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:09,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 11:06:09,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:06:09,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 11:06:09,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:09,240 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 11:06:09,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932558506] [2020-10-13 11:06:09,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:09,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 11:06:09,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566438413] [2020-10-13 11:06:09,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 11:06:09,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:09,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 11:06:09,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-13 11:06:09,242 INFO L87 Difference]: Start difference. First operand 125 states and 148 transitions. Second operand 13 states. [2020-10-13 11:06:09,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:09,503 INFO L93 Difference]: Finished difference Result 151 states and 179 transitions. [2020-10-13 11:06:09,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 11:06:09,505 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-10-13 11:06:09,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:09,507 INFO L225 Difference]: With dead ends: 151 [2020-10-13 11:06:09,507 INFO L226 Difference]: Without dead ends: 137 [2020-10-13 11:06:09,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-13 11:06:09,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-13 11:06:09,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 128. [2020-10-13 11:06:09,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-13 11:06:09,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 153 transitions. [2020-10-13 11:06:09,533 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 153 transitions. Word has length 41 [2020-10-13 11:06:09,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:09,533 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 153 transitions. [2020-10-13 11:06:09,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 11:06:09,533 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 153 transitions. [2020-10-13 11:06:09,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 11:06:09,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:09,535 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:06:09,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 11:06:09,535 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:09,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:09,535 INFO L82 PathProgramCache]: Analyzing trace with hash -508863585, now seen corresponding path program 16 times [2020-10-13 11:06:09,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:09,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1270575304] [2020-10-13 11:06:09,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:09,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:09,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:09,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:09,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 11:06:09,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:09,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-10-13 11:06:09,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:09,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 11:06:09,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:06:09,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 11:06:09,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:09,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:09,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:09,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:09,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:09,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:09,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:09,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:09,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:09,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:09,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:09,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:09,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:09,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:09,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:09,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:09,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:09,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 11:06:09,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:09,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-13 11:06:09,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:09,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 11:06:09,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:09,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 11:06:09,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:09,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-13 11:06:09,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:09,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:09,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:09,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 11:06:09,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:09,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-13 11:06:09,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:09,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 11:06:09,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:06:09,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 11:06:09,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:09,971 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 11:06:09,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1270575304] [2020-10-13 11:06:09,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:09,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 11:06:09,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706902552] [2020-10-13 11:06:09,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 11:06:09,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:09,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 11:06:09,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-13 11:06:09,978 INFO L87 Difference]: Start difference. First operand 128 states and 153 transitions. Second operand 13 states. [2020-10-13 11:06:10,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:10,220 INFO L93 Difference]: Finished difference Result 143 states and 168 transitions. [2020-10-13 11:06:10,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 11:06:10,220 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-10-13 11:06:10,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:10,221 INFO L225 Difference]: With dead ends: 143 [2020-10-13 11:06:10,222 INFO L226 Difference]: Without dead ends: 131 [2020-10-13 11:06:10,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-13 11:06:10,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-13 11:06:10,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2020-10-13 11:06:10,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-13 11:06:10,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 153 transitions. [2020-10-13 11:06:10,238 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 153 transitions. Word has length 41 [2020-10-13 11:06:10,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:10,238 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 153 transitions. [2020-10-13 11:06:10,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 11:06:10,238 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 153 transitions. [2020-10-13 11:06:10,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 11:06:10,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:10,239 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:06:10,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 11:06:10,240 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:10,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:10,240 INFO L82 PathProgramCache]: Analyzing trace with hash 2138005090, now seen corresponding path program 17 times [2020-10-13 11:06:10,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:10,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [468310775] [2020-10-13 11:06:10,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:10,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:10,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:10,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:10,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 11:06:10,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:10,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-13 11:06:10,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:10,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 11:06:10,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:06:10,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 11:06:10,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:10,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:10,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:10,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:10,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:10,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:10,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:10,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:06:10,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:10,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:10,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:10,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:10,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:10,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:10,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:10,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:10,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:10,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 11:06:10,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:10,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-13 11:06:10,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:10,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 11:06:10,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:06:10,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 11:06:10,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:10,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-13 11:06:10,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:10,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:10,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:10,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 11:06:10,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:10,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 11:06:10,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:10,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:10,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:06:10,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:10,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:10,440 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 11:06:10,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [468310775] [2020-10-13 11:06:10,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:10,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 11:06:10,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328126224] [2020-10-13 11:06:10,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 11:06:10,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:10,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 11:06:10,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 11:06:10,442 INFO L87 Difference]: Start difference. First operand 129 states and 153 transitions. Second operand 8 states. [2020-10-13 11:06:10,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:10,521 INFO L93 Difference]: Finished difference Result 245 states and 292 transitions. [2020-10-13 11:06:10,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 11:06:10,522 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-10-13 11:06:10,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:10,523 INFO L225 Difference]: With dead ends: 245 [2020-10-13 11:06:10,523 INFO L226 Difference]: Without dead ends: 163 [2020-10-13 11:06:10,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-13 11:06:10,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-13 11:06:10,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 151. [2020-10-13 11:06:10,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-13 11:06:10,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 180 transitions. [2020-10-13 11:06:10,546 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 180 transitions. Word has length 41 [2020-10-13 11:06:10,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:10,546 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 180 transitions. [2020-10-13 11:06:10,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 11:06:10,546 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 180 transitions. [2020-10-13 11:06:10,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 11:06:10,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:10,553 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:06:10,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 11:06:10,555 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:10,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:10,555 INFO L82 PathProgramCache]: Analyzing trace with hash 854078425, now seen corresponding path program 18 times [2020-10-13 11:06:10,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:10,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014260737] [2020-10-13 11:06:10,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:10,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:10,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:10,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:10,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 11:06:10,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:10,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-13 11:06:10,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:10,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 11:06:10,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 11:06:10,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 11:06:10,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:06:10,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:10,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:10,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:10,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:10,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:10,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:10,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:10,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:10,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:10,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:10,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:10,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:10,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:10,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:10,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:10,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:10,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 11:06:10,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:10,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 11:06:10,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:10,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:10,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:10,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:10,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:06:10,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-13 11:06:10,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:10,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:10,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:10,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 11:06:10,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:10,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-13 11:06:10,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:10,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 11:06:10,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:06:10,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 11:06:10,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:06:10,831 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 11:06:10,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014260737] [2020-10-13 11:06:10,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:10,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 11:06:10,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904143117] [2020-10-13 11:06:10,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 11:06:10,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:10,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 11:06:10,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 11:06:10,833 INFO L87 Difference]: Start difference. First operand 151 states and 180 transitions. Second operand 8 states. [2020-10-13 11:06:10,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:10,928 INFO L93 Difference]: Finished difference Result 207 states and 249 transitions. [2020-10-13 11:06:10,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 11:06:10,930 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-10-13 11:06:10,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:10,932 INFO L225 Difference]: With dead ends: 207 [2020-10-13 11:06:10,932 INFO L226 Difference]: Without dead ends: 185 [2020-10-13 11:06:10,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-13 11:06:10,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-13 11:06:10,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 173. [2020-10-13 11:06:10,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-13 11:06:10,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 207 transitions. [2020-10-13 11:06:10,960 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 207 transitions. Word has length 41 [2020-10-13 11:06:10,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:10,960 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 207 transitions. [2020-10-13 11:06:10,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 11:06:10,960 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 207 transitions. [2020-10-13 11:06:10,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 11:06:10,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:10,962 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:06:10,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 11:06:10,962 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:10,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:10,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1369826194, now seen corresponding path program 19 times [2020-10-13 11:06:10,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:10,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88746626] [2020-10-13 11:06:10,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:10,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:10,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:11,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:11,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 11:06:11,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:11,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 351 [2020-10-13 11:06:11,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:11,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 11:06:11,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:06:11,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 11:06:11,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:11,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:11,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:11,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:11,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:11,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:11,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:11,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:11,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:11,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:11,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:11,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:11,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:11,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:11,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:11,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:11,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:11,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 11:06:11,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:11,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-13 11:06:11,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:11,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 11:06:11,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:11,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 11:06:11,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:11,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-13 11:06:11,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:11,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:11,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:11,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 11:06:11,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:11,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-13 11:06:11,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:11,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 11:06:11,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:11,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 11:06:11,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:11,851 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:06:11,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88746626] [2020-10-13 11:06:11,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:11,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 11:06:11,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154800142] [2020-10-13 11:06:11,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 11:06:11,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:11,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 11:06:11,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-10-13 11:06:11,854 INFO L87 Difference]: Start difference. First operand 173 states and 207 transitions. Second operand 24 states. [2020-10-13 11:06:12,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:12,454 INFO L93 Difference]: Finished difference Result 223 states and 266 transitions. [2020-10-13 11:06:12,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 11:06:12,455 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 42 [2020-10-13 11:06:12,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:12,457 INFO L225 Difference]: With dead ends: 223 [2020-10-13 11:06:12,457 INFO L226 Difference]: Without dead ends: 217 [2020-10-13 11:06:12,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=1033, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 11:06:12,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-13 11:06:12,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 189. [2020-10-13 11:06:12,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-13 11:06:12,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 226 transitions. [2020-10-13 11:06:12,491 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 226 transitions. Word has length 42 [2020-10-13 11:06:12,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:12,491 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 226 transitions. [2020-10-13 11:06:12,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 11:06:12,491 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 226 transitions. [2020-10-13 11:06:12,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 11:06:12,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:12,493 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:06:12,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 11:06:12,494 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:12,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:12,494 INFO L82 PathProgramCache]: Analyzing trace with hash -402225529, now seen corresponding path program 20 times [2020-10-13 11:06:12,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:12,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612861856] [2020-10-13 11:06:12,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:12,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:12,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:12,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:12,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 11:06:12,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:12,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-13 11:06:12,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:12,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 11:06:12,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:06:12,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 11:06:12,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:12,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:12,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:12,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:12,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:12,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:12,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:12,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:12,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:12,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:12,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:12,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:12,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:12,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:12,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:12,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:12,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:12,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 11:06:12,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:12,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-13 11:06:12,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:12,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 11:06:12,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:12,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 11:06:12,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:12,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-13 11:06:12,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:12,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:12,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:12,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 11:06:12,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:12,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-13 11:06:12,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:12,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 11:06:12,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:06:12,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 11:06:12,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:12,823 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-13 11:06:12,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612861856] [2020-10-13 11:06:12,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:12,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 11:06:12,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702092673] [2020-10-13 11:06:12,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 11:06:12,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:12,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 11:06:12,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-13 11:06:12,825 INFO L87 Difference]: Start difference. First operand 189 states and 226 transitions. Second operand 11 states. [2020-10-13 11:06:13,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:13,022 INFO L93 Difference]: Finished difference Result 229 states and 272 transitions. [2020-10-13 11:06:13,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 11:06:13,023 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2020-10-13 11:06:13,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:13,026 INFO L225 Difference]: With dead ends: 229 [2020-10-13 11:06:13,026 INFO L226 Difference]: Without dead ends: 214 [2020-10-13 11:06:13,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-13 11:06:13,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-13 11:06:13,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 209. [2020-10-13 11:06:13,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-10-13 11:06:13,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 248 transitions. [2020-10-13 11:06:13,062 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 248 transitions. Word has length 42 [2020-10-13 11:06:13,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:13,063 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 248 transitions. [2020-10-13 11:06:13,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 11:06:13,063 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 248 transitions. [2020-10-13 11:06:13,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 11:06:13,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:13,067 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:06:13,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 11:06:13,067 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:13,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:13,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1931193074, now seen corresponding path program 21 times [2020-10-13 11:06:13,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:13,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061069618] [2020-10-13 11:06:13,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:13,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:13,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:13,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:13,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 11:06:13,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:13,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-10-13 11:06:13,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:13,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 11:06:13,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:06:13,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 11:06:13,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:13,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:13,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:13,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:13,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:13,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:13,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:13,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:13,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:13,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:13,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:13,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:13,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:13,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:13,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:13,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:13,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:13,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 11:06:13,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:13,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-13 11:06:13,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:13,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 11:06:13,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:13,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 11:06:13,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:13,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-13 11:06:13,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:13,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:13,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:13,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 11:06:13,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:13,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-13 11:06:13,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:13,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 11:06:13,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:13,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 11:06:13,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:13,819 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 11:06:13,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061069618] [2020-10-13 11:06:13,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:13,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 11:06:13,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274042736] [2020-10-13 11:06:13,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 11:06:13,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:13,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 11:06:13,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-13 11:06:13,822 INFO L87 Difference]: Start difference. First operand 209 states and 248 transitions. Second operand 22 states. [2020-10-13 11:06:14,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:14,343 INFO L93 Difference]: Finished difference Result 227 states and 270 transitions. [2020-10-13 11:06:14,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 11:06:14,344 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2020-10-13 11:06:14,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:14,346 INFO L225 Difference]: With dead ends: 227 [2020-10-13 11:06:14,346 INFO L226 Difference]: Without dead ends: 212 [2020-10-13 11:06:14,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=1029, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 11:06:14,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-13 11:06:14,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 207. [2020-10-13 11:06:14,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-13 11:06:14,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 247 transitions. [2020-10-13 11:06:14,376 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 247 transitions. Word has length 42 [2020-10-13 11:06:14,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:14,376 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 247 transitions. [2020-10-13 11:06:14,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 11:06:14,376 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 247 transitions. [2020-10-13 11:06:14,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 11:06:14,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:14,379 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:06:14,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 11:06:14,379 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:14,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:14,380 INFO L82 PathProgramCache]: Analyzing trace with hash -658076149, now seen corresponding path program 22 times [2020-10-13 11:06:14,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:14,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846917127] [2020-10-13 11:06:14,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:14,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:14,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:14,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:14,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 11:06:14,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:14,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-13 11:06:14,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:14,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 11:06:14,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:06:14,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 11:06:14,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:14,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:14,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:14,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:14,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:14,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:14,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:14,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:14,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:14,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:14,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:14,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:14,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:14,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:14,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:14,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:14,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:14,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 11:06:14,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:14,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-13 11:06:14,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:14,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 11:06:14,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:14,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 11:06:14,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:14,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-13 11:06:14,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:14,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:14,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:14,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 11:06:14,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:14,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-13 11:06:14,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:14,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 11:06:14,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:06:14,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 11:06:14,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:14,721 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-13 11:06:14,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846917127] [2020-10-13 11:06:14,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:14,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 11:06:14,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469432112] [2020-10-13 11:06:14,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 11:06:14,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:14,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 11:06:14,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-13 11:06:14,723 INFO L87 Difference]: Start difference. First operand 207 states and 247 transitions. Second operand 11 states. [2020-10-13 11:06:14,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:14,916 INFO L93 Difference]: Finished difference Result 221 states and 260 transitions. [2020-10-13 11:06:14,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 11:06:14,917 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2020-10-13 11:06:14,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:14,919 INFO L225 Difference]: With dead ends: 221 [2020-10-13 11:06:14,919 INFO L226 Difference]: Without dead ends: 201 [2020-10-13 11:06:14,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-13 11:06:14,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-13 11:06:14,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 199. [2020-10-13 11:06:14,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-13 11:06:14,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 235 transitions. [2020-10-13 11:06:14,944 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 235 transitions. Word has length 42 [2020-10-13 11:06:14,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:14,944 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 235 transitions. [2020-10-13 11:06:14,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 11:06:14,944 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 235 transitions. [2020-10-13 11:06:14,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 11:06:14,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:14,947 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:06:14,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 11:06:14,947 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:14,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:14,948 INFO L82 PathProgramCache]: Analyzing trace with hash -520332801, now seen corresponding path program 23 times [2020-10-13 11:06:14,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:14,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885441985] [2020-10-13 11:06:14,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:14,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:14,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:15,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:15,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 11:06:15,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:15,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-13 11:06:15,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:15,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 11:06:15,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:06:15,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 11:06:15,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:15,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:15,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:15,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:15,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:15,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:15,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:15,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:15,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:15,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:15,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:15,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:15,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:15,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:15,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:15,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:15,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 11:06:15,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:15,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-13 11:06:15,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:15,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 11:06:15,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:15,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 11:06:15,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:15,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-13 11:06:15,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:15,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:15,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:15,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 11:06:15,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:15,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-13 11:06:15,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:15,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 11:06:15,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:06:15,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 11:06:15,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:15,422 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 11:06:15,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885441985] [2020-10-13 11:06:15,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:15,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 11:06:15,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573537750] [2020-10-13 11:06:15,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 11:06:15,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:15,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 11:06:15,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-13 11:06:15,424 INFO L87 Difference]: Start difference. First operand 199 states and 235 transitions. Second operand 15 states. [2020-10-13 11:06:15,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:15,766 INFO L93 Difference]: Finished difference Result 243 states and 288 transitions. [2020-10-13 11:06:15,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 11:06:15,767 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-10-13 11:06:15,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:15,770 INFO L225 Difference]: With dead ends: 243 [2020-10-13 11:06:15,770 INFO L226 Difference]: Without dead ends: 229 [2020-10-13 11:06:15,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-13 11:06:15,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-13 11:06:15,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 220. [2020-10-13 11:06:15,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-13 11:06:15,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 261 transitions. [2020-10-13 11:06:15,798 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 261 transitions. Word has length 43 [2020-10-13 11:06:15,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:15,799 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 261 transitions. [2020-10-13 11:06:15,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 11:06:15,799 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 261 transitions. [2020-10-13 11:06:15,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 11:06:15,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:15,801 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:06:15,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 11:06:15,802 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:15,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:15,802 INFO L82 PathProgramCache]: Analyzing trace with hash 216640728, now seen corresponding path program 24 times [2020-10-13 11:06:15,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:15,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392715838] [2020-10-13 11:06:15,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:15,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:15,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:16,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:16,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 11:06:16,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:16,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-10-13 11:06:16,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:16,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 11:06:16,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:06:16,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 11:06:16,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:06:16,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:16,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:16,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:16,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:16,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:16,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:16,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:16,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:16,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:16,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:16,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:16,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:16,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:16,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:16,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:16,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:16,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 11:06:16,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:16,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-13 11:06:16,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:16,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 11:06:16,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:16,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 11:06:16,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:16,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-13 11:06:16,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:16,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:16,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:16,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 11:06:16,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:16,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-13 11:06:16,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:16,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 11:06:16,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:06:16,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 11:06:16,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:16,340 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 11:06:16,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392715838] [2020-10-13 11:06:16,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:16,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 11:06:16,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202874940] [2020-10-13 11:06:16,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 11:06:16,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:16,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 11:06:16,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-13 11:06:16,341 INFO L87 Difference]: Start difference. First operand 220 states and 261 transitions. Second operand 15 states. [2020-10-13 11:06:16,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:16,654 INFO L93 Difference]: Finished difference Result 235 states and 276 transitions. [2020-10-13 11:06:16,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 11:06:16,655 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-10-13 11:06:16,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:16,657 INFO L225 Difference]: With dead ends: 235 [2020-10-13 11:06:16,657 INFO L226 Difference]: Without dead ends: 223 [2020-10-13 11:06:16,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-13 11:06:16,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-13 11:06:16,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 221. [2020-10-13 11:06:16,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-10-13 11:06:16,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 260 transitions. [2020-10-13 11:06:16,680 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 260 transitions. Word has length 43 [2020-10-13 11:06:16,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:16,680 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 260 transitions. [2020-10-13 11:06:16,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 11:06:16,680 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 260 transitions. [2020-10-13 11:06:16,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 11:06:16,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:16,683 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:06:16,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 11:06:16,683 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:16,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:16,684 INFO L82 PathProgramCache]: Analyzing trace with hash -444003079, now seen corresponding path program 25 times [2020-10-13 11:06:16,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:16,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410644072] [2020-10-13 11:06:16,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:16,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:16,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:16,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:16,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 11:06:16,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:16,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-13 11:06:16,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:16,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 11:06:16,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 11:06:16,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 11:06:16,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:16,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:16,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:16,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:16,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:16,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:16,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:16,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:16,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:16,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:16,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:16,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:16,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:16,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:16,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:16,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:16,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:16,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 11:06:16,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:16,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 11:06:16,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:16,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:16,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:16,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:16,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:16,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-13 11:06:16,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:16,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:16,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:16,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 11:06:16,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:16,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-13 11:06:16,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:16,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 11:06:16,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:06:16,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 11:06:16,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:16,925 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-13 11:06:16,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410644072] [2020-10-13 11:06:16,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:16,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 11:06:16,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645951477] [2020-10-13 11:06:16,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 11:06:16,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:16,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 11:06:16,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-13 11:06:16,927 INFO L87 Difference]: Start difference. First operand 221 states and 260 transitions. Second operand 9 states. [2020-10-13 11:06:17,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:17,025 INFO L93 Difference]: Finished difference Result 239 states and 280 transitions. [2020-10-13 11:06:17,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 11:06:17,025 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-10-13 11:06:17,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:17,027 INFO L225 Difference]: With dead ends: 239 [2020-10-13 11:06:17,027 INFO L226 Difference]: Without dead ends: 218 [2020-10-13 11:06:17,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2020-10-13 11:06:17,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-13 11:06:17,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 206. [2020-10-13 11:06:17,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-10-13 11:06:17,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 239 transitions. [2020-10-13 11:06:17,057 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 239 transitions. Word has length 43 [2020-10-13 11:06:17,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:17,057 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 239 transitions. [2020-10-13 11:06:17,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 11:06:17,057 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 239 transitions. [2020-10-13 11:06:17,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 11:06:17,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:17,060 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:06:17,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 11:06:17,060 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:17,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:17,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1181398018, now seen corresponding path program 26 times [2020-10-13 11:06:17,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:17,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437045558] [2020-10-13 11:06:17,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:17,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:17,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:17,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:17,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 11:06:17,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:17,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-13 11:06:17,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:17,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 11:06:17,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:06:17,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 11:06:17,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:17,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:17,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:17,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:17,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:17,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:17,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:17,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 11:06:17,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:17,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:17,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:17,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:17,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:17,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:17,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:17,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:17,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:17,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 11:06:17,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:17,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-13 11:06:17,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:17,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 11:06:17,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:06:17,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 11:06:17,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:17,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-13 11:06:17,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:17,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:17,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:17,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 11:06:17,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:17,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 11:06:17,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:17,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:17,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 11:06:17,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:17,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:17,330 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-13 11:06:17,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437045558] [2020-10-13 11:06:17,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:17,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 11:06:17,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080343209] [2020-10-13 11:06:17,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 11:06:17,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:17,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 11:06:17,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-13 11:06:17,332 INFO L87 Difference]: Start difference. First operand 206 states and 239 transitions. Second operand 9 states. [2020-10-13 11:06:17,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:17,435 INFO L93 Difference]: Finished difference Result 332 states and 382 transitions. [2020-10-13 11:06:17,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 11:06:17,435 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-10-13 11:06:17,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:17,437 INFO L225 Difference]: With dead ends: 332 [2020-10-13 11:06:17,437 INFO L226 Difference]: Without dead ends: 211 [2020-10-13 11:06:17,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2020-10-13 11:06:17,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-13 11:06:17,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2020-10-13 11:06:17,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-13 11:06:17,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 244 transitions. [2020-10-13 11:06:17,462 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 244 transitions. Word has length 43 [2020-10-13 11:06:17,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:17,462 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 244 transitions. [2020-10-13 11:06:17,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 11:06:17,462 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 244 transitions. [2020-10-13 11:06:17,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 11:06:17,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:17,465 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:06:17,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 11:06:17,465 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:17,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:17,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1909343879, now seen corresponding path program 27 times [2020-10-13 11:06:17,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:17,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427499920] [2020-10-13 11:06:17,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:17,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:17,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:17,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:17,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 11:06:17,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:17,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 343 [2020-10-13 11:06:17,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:17,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 11:06:17,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:06:17,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 11:06:17,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:17,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:17,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:17,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:17,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:17,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:17,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:17,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:17,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:17,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:17,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:17,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:17,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:17,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:17,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:17,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:17,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:17,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 11:06:17,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:17,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-13 11:06:17,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:17,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 11:06:17,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:17,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 11:06:17,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:18,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-13 11:06:18,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:18,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:18,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:18,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 11:06:18,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:18,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-13 11:06:18,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:18,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 11:06:18,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:18,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 11:06:18,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:06:18,518 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:06:18,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427499920] [2020-10-13 11:06:18,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:18,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 11:06:18,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984764645] [2020-10-13 11:06:18,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 11:06:18,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:18,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 11:06:18,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-10-13 11:06:18,521 INFO L87 Difference]: Start difference. First operand 211 states and 244 transitions. Second operand 26 states. [2020-10-13 11:06:19,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:19,552 INFO L93 Difference]: Finished difference Result 269 states and 311 transitions. [2020-10-13 11:06:19,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 11:06:19,552 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 44 [2020-10-13 11:06:19,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:19,554 INFO L225 Difference]: With dead ends: 269 [2020-10-13 11:06:19,554 INFO L226 Difference]: Without dead ends: 263 [2020-10-13 11:06:19,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=93, Invalid=1167, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 11:06:19,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-13 11:06:19,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 227. [2020-10-13 11:06:19,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-13 11:06:19,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 263 transitions. [2020-10-13 11:06:19,590 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 263 transitions. Word has length 44 [2020-10-13 11:06:19,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:19,591 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 263 transitions. [2020-10-13 11:06:19,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 11:06:19,591 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 263 transitions. [2020-10-13 11:06:19,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 11:06:19,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:19,595 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:06:19,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 11:06:19,596 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:19,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:19,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1395186759, now seen corresponding path program 28 times [2020-10-13 11:06:19,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:19,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554213077] [2020-10-13 11:06:19,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:19,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:19,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:19,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:19,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 11:06:19,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:19,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 327 [2020-10-13 11:06:19,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:19,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 11:06:19,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:06:19,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 11:06:19,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:19,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:19,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:20,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:20,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:20,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:20,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:20,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:20,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:20,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:20,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:20,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:20,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:20,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:20,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:20,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:20,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 11:06:20,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:20,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-13 11:06:20,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:20,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 11:06:20,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:20,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 11:06:20,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:20,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-13 11:06:20,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:20,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:20,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:20,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 11:06:20,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:20,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-13 11:06:20,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:20,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 11:06:20,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:20,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 11:06:20,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:20,490 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 11:06:20,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554213077] [2020-10-13 11:06:20,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:20,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 11:06:20,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254177398] [2020-10-13 11:06:20,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 11:06:20,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:20,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 11:06:20,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-10-13 11:06:20,492 INFO L87 Difference]: Start difference. First operand 227 states and 263 transitions. Second operand 24 states. [2020-10-13 11:06:21,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:21,194 INFO L93 Difference]: Finished difference Result 233 states and 268 transitions. [2020-10-13 11:06:21,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 11:06:21,199 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 44 [2020-10-13 11:06:21,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:21,201 INFO L225 Difference]: With dead ends: 233 [2020-10-13 11:06:21,201 INFO L226 Difference]: Without dead ends: 211 [2020-10-13 11:06:21,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 11:06:21,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-13 11:06:21,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2020-10-13 11:06:21,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-13 11:06:21,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 245 transitions. [2020-10-13 11:06:21,229 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 245 transitions. Word has length 44 [2020-10-13 11:06:21,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:21,230 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 245 transitions. [2020-10-13 11:06:21,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 11:06:21,230 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 245 transitions. [2020-10-13 11:06:21,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 11:06:21,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:21,232 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:06:21,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 11:06:21,233 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:21,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:21,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1454143865, now seen corresponding path program 29 times [2020-10-13 11:06:21,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:21,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500816369] [2020-10-13 11:06:21,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:21,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:21,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:21,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:21,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 11:06:21,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:21,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 296 [2020-10-13 11:06:21,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:21,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 11:06:21,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:06:21,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 11:06:21,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:21,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:21,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:21,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:21,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:21,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:21,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:21,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:21,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:21,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:21,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:21,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:21,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:21,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:21,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:21,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:21,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:21,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 11:06:21,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:21,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-13 11:06:21,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:21,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 11:06:21,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:21,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 11:06:21,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:21,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-13 11:06:21,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:21,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:21,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:21,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 11:06:21,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:21,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-13 11:06:21,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:21,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 11:06:21,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:21,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 11:06:21,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:22,007 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 11:06:22,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500816369] [2020-10-13 11:06:22,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:22,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 11:06:22,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590063960] [2020-10-13 11:06:22,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 11:06:22,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:22,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 11:06:22,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-13 11:06:22,010 INFO L87 Difference]: Start difference. First operand 211 states and 245 transitions. Second operand 22 states. [2020-10-13 11:06:22,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:22,608 INFO L93 Difference]: Finished difference Result 229 states and 266 transitions. [2020-10-13 11:06:22,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 11:06:22,609 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 44 [2020-10-13 11:06:22,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:22,611 INFO L225 Difference]: With dead ends: 229 [2020-10-13 11:06:22,611 INFO L226 Difference]: Without dead ends: 223 [2020-10-13 11:06:22,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 11:06:22,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-13 11:06:22,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 221. [2020-10-13 11:06:22,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-10-13 11:06:22,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 258 transitions. [2020-10-13 11:06:22,638 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 258 transitions. Word has length 44 [2020-10-13 11:06:22,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:22,638 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 258 transitions. [2020-10-13 11:06:22,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 11:06:22,638 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 258 transitions. [2020-10-13 11:06:22,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 11:06:22,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:22,641 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:06:22,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 11:06:22,641 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:22,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:22,641 INFO L82 PathProgramCache]: Analyzing trace with hash 904610040, now seen corresponding path program 30 times [2020-10-13 11:06:22,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:22,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1056418738] [2020-10-13 11:06:22,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:22,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:22,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:22,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:22,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 11:06:22,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:22,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 240 [2020-10-13 11:06:22,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:22,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 11:06:22,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:06:22,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 11:06:22,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:22,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:22,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:22,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:22,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:22,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:22,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:22,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:22,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:22,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:22,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:22,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:22,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:22,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:22,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:22,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:22,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:22,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 11:06:22,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:22,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-13 11:06:22,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:22,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 11:06:22,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:22,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 11:06:22,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:23,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-13 11:06:23,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:23,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:23,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:23,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 11:06:23,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:23,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-13 11:06:23,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:23,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 11:06:23,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:06:23,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 11:06:23,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:23,265 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 11:06:23,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1056418738] [2020-10-13 11:06:23,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:23,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 11:06:23,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700353511] [2020-10-13 11:06:23,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 11:06:23,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:23,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 11:06:23,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-13 11:06:23,267 INFO L87 Difference]: Start difference. First operand 221 states and 258 transitions. Second operand 17 states. [2020-10-13 11:06:23,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:23,733 INFO L93 Difference]: Finished difference Result 267 states and 313 transitions. [2020-10-13 11:06:23,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 11:06:23,733 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2020-10-13 11:06:23,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:23,737 INFO L225 Difference]: With dead ends: 267 [2020-10-13 11:06:23,737 INFO L226 Difference]: Without dead ends: 253 [2020-10-13 11:06:23,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-10-13 11:06:23,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-13 11:06:23,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 244. [2020-10-13 11:06:23,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-13 11:06:23,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 286 transitions. [2020-10-13 11:06:23,770 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 286 transitions. Word has length 45 [2020-10-13 11:06:23,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:23,770 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 286 transitions. [2020-10-13 11:06:23,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 11:06:23,770 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 286 transitions. [2020-10-13 11:06:23,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 11:06:23,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:23,773 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:06:23,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 11:06:23,774 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:23,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:23,774 INFO L82 PathProgramCache]: Analyzing trace with hash -2019014337, now seen corresponding path program 31 times [2020-10-13 11:06:23,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:23,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145905558] [2020-10-13 11:06:23,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:23,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:23,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:24,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:24,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 11:06:24,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:24,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-13 11:06:24,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:24,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 11:06:24,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:06:24,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 11:06:24,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:24,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:24,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:24,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:24,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:24,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:24,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:24,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:24,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:24,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:24,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:24,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:24,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:24,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:24,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:24,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:24,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:24,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 11:06:24,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:24,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-13 11:06:24,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:24,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 11:06:24,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:24,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 11:06:24,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:24,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-13 11:06:24,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:24,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:24,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:24,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 11:06:24,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:24,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-13 11:06:24,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:24,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 11:06:24,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:06:24,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 11:06:24,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:24,373 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 11:06:24,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145905558] [2020-10-13 11:06:24,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:24,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 11:06:24,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104195323] [2020-10-13 11:06:24,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 11:06:24,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:24,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 11:06:24,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-13 11:06:24,376 INFO L87 Difference]: Start difference. First operand 244 states and 286 transitions. Second operand 17 states. [2020-10-13 11:06:24,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:24,794 INFO L93 Difference]: Finished difference Result 259 states and 301 transitions. [2020-10-13 11:06:24,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 11:06:24,794 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2020-10-13 11:06:24,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:24,796 INFO L225 Difference]: With dead ends: 259 [2020-10-13 11:06:24,796 INFO L226 Difference]: Without dead ends: 247 [2020-10-13 11:06:24,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-10-13 11:06:24,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-10-13 11:06:24,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 245. [2020-10-13 11:06:24,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-10-13 11:06:24,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 285 transitions. [2020-10-13 11:06:24,836 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 285 transitions. Word has length 45 [2020-10-13 11:06:24,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:24,837 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 285 transitions. [2020-10-13 11:06:24,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 11:06:24,837 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 285 transitions. [2020-10-13 11:06:24,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 11:06:24,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:24,841 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:06:24,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 11:06:24,841 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:24,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:24,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1551563614, now seen corresponding path program 32 times [2020-10-13 11:06:24,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:24,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755890112] [2020-10-13 11:06:24,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:24,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:24,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:24,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:24,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 11:06:24,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:24,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-13 11:06:24,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:24,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 11:06:24,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:06:24,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 11:06:24,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:24,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:24,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:24,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:24,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:24,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:24,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:24,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:06:24,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:24,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:24,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:24,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:24,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:24,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:24,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:24,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:25,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:25,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 11:06:25,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:25,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-13 11:06:25,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:25,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 11:06:25,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:06:25,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 11:06:25,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:25,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-13 11:06:25,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:25,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:25,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:25,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 11:06:25,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:25,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 11:06:25,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:25,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:25,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 11:06:25,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:25,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:06:25,091 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-13 11:06:25,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755890112] [2020-10-13 11:06:25,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:25,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 11:06:25,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994463475] [2020-10-13 11:06:25,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 11:06:25,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:25,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 11:06:25,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-13 11:06:25,094 INFO L87 Difference]: Start difference. First operand 245 states and 285 transitions. Second operand 10 states. [2020-10-13 11:06:25,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:25,298 INFO L93 Difference]: Finished difference Result 448 states and 522 transitions. [2020-10-13 11:06:25,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 11:06:25,299 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-10-13 11:06:25,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:25,301 INFO L225 Difference]: With dead ends: 448 [2020-10-13 11:06:25,302 INFO L226 Difference]: Without dead ends: 301 [2020-10-13 11:06:25,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-10-13 11:06:25,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-10-13 11:06:25,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 283. [2020-10-13 11:06:25,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-10-13 11:06:25,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 330 transitions. [2020-10-13 11:06:25,356 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 330 transitions. Word has length 45 [2020-10-13 11:06:25,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:25,356 INFO L479 AbstractCegarLoop]: Abstraction has 283 states and 330 transitions. [2020-10-13 11:06:25,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 11:06:25,357 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 330 transitions. [2020-10-13 11:06:25,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 11:06:25,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:25,360 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:06:25,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 11:06:25,360 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:25,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:25,361 INFO L82 PathProgramCache]: Analyzing trace with hash 167156985, now seen corresponding path program 33 times [2020-10-13 11:06:25,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:25,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297695390] [2020-10-13 11:06:25,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:25,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:25,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:25,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:25,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 11:06:25,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:25,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-13 11:06:25,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:25,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 11:06:25,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 11:06:25,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 11:06:25,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:25,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:25,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:25,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:25,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:25,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:25,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:25,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:25,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:25,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:25,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:25,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:25,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:25,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:25,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:25,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:25,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:25,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 11:06:25,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:25,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 11:06:25,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:25,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:25,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:25,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:25,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:25,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-13 11:06:25,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:25,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:25,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:25,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 11:06:25,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:25,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-13 11:06:25,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:25,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 11:06:25,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:06:25,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 11:06:25,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:25,651 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-13 11:06:25,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297695390] [2020-10-13 11:06:25,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:25,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 11:06:25,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087869571] [2020-10-13 11:06:25,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 11:06:25,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:25,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 11:06:25,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-13 11:06:25,653 INFO L87 Difference]: Start difference. First operand 283 states and 330 transitions. Second operand 10 states. [2020-10-13 11:06:25,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:25,806 INFO L93 Difference]: Finished difference Result 369 states and 435 transitions. [2020-10-13 11:06:25,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 11:06:25,807 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-10-13 11:06:25,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:25,810 INFO L225 Difference]: With dead ends: 369 [2020-10-13 11:06:25,811 INFO L226 Difference]: Without dead ends: 339 [2020-10-13 11:06:25,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-10-13 11:06:25,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-10-13 11:06:25,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 321. [2020-10-13 11:06:25,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2020-10-13 11:06:25,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 375 transitions. [2020-10-13 11:06:25,867 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 375 transitions. Word has length 45 [2020-10-13 11:06:25,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:25,867 INFO L479 AbstractCegarLoop]: Abstraction has 321 states and 375 transitions. [2020-10-13 11:06:25,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 11:06:25,867 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 375 transitions. [2020-10-13 11:06:25,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 11:06:25,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:25,871 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:06:25,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 11:06:25,872 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:25,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:25,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1799793138, now seen corresponding path program 34 times [2020-10-13 11:06:25,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:25,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576959272] [2020-10-13 11:06:25,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:25,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:25,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:26,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:26,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 11:06:26,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:26,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 325 [2020-10-13 11:06:26,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:26,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 11:06:26,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:06:26,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 11:06:26,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:26,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:26,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:26,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:26,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:26,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:26,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:26,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:06:26,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:26,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:26,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:26,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:26,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:26,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:26,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:26,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:26,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:26,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 11:06:26,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:26,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-13 11:06:26,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:26,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 11:06:26,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:26,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 11:06:26,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:26,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-13 11:06:26,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:26,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:26,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:26,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 11:06:26,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:26,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-13 11:06:26,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:26,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 11:06:26,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:26,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 11:06:26,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:26,827 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:06:26,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576959272] [2020-10-13 11:06:26,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:26,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 11:06:26,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099804163] [2020-10-13 11:06:26,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 11:06:26,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:26,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 11:06:26,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-10-13 11:06:26,830 INFO L87 Difference]: Start difference. First operand 321 states and 375 transitions. Second operand 28 states. [2020-10-13 11:06:27,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:27,721 INFO L93 Difference]: Finished difference Result 391 states and 456 transitions. [2020-10-13 11:06:27,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 11:06:27,723 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 46 [2020-10-13 11:06:27,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:27,726 INFO L225 Difference]: With dead ends: 391 [2020-10-13 11:06:27,726 INFO L226 Difference]: Without dead ends: 385 [2020-10-13 11:06:27,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=97, Invalid=1309, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 11:06:27,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2020-10-13 11:06:27,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 337. [2020-10-13 11:06:27,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-10-13 11:06:27,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 394 transitions. [2020-10-13 11:06:27,771 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 394 transitions. Word has length 46 [2020-10-13 11:06:27,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:27,772 INFO L479 AbstractCegarLoop]: Abstraction has 337 states and 394 transitions. [2020-10-13 11:06:27,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 11:06:27,772 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 394 transitions. [2020-10-13 11:06:27,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 11:06:27,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:27,776 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:06:27,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 11:06:27,777 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:27,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:27,777 INFO L82 PathProgramCache]: Analyzing trace with hash 646206930, now seen corresponding path program 35 times [2020-10-13 11:06:27,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:27,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659423249] [2020-10-13 11:06:27,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:27,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:27,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:28,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:28,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 11:06:28,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:28,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 333 [2020-10-13 11:06:28,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:28,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 11:06:28,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:06:28,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 11:06:28,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:28,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:28,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:28,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:28,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:28,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:28,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:28,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:28,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:28,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:28,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:28,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:28,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:28,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:28,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:28,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:28,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:28,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 11:06:28,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:28,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-13 11:06:28,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:28,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 11:06:28,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:28,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 11:06:28,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:28,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-13 11:06:28,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:28,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:28,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:28,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 11:06:28,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:28,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-13 11:06:28,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:28,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 11:06:28,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:28,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 11:06:28,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:28,726 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 11:06:28,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659423249] [2020-10-13 11:06:28,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:28,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 11:06:28,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722509756] [2020-10-13 11:06:28,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 11:06:28,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:28,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 11:06:28,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-10-13 11:06:28,728 INFO L87 Difference]: Start difference. First operand 337 states and 394 transitions. Second operand 26 states. [2020-10-13 11:06:29,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:29,465 INFO L93 Difference]: Finished difference Result 343 states and 399 transitions. [2020-10-13 11:06:29,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 11:06:29,465 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 46 [2020-10-13 11:06:29,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:29,467 INFO L225 Difference]: With dead ends: 343 [2020-10-13 11:06:29,468 INFO L226 Difference]: Without dead ends: 321 [2020-10-13 11:06:29,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=1305, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 11:06:29,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-10-13 11:06:29,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 321. [2020-10-13 11:06:29,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2020-10-13 11:06:29,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 376 transitions. [2020-10-13 11:06:29,508 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 376 transitions. Word has length 46 [2020-10-13 11:06:29,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:29,508 INFO L479 AbstractCegarLoop]: Abstraction has 321 states and 376 transitions. [2020-10-13 11:06:29,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 11:06:29,509 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 376 transitions. [2020-10-13 11:06:29,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 11:06:29,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:29,512 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:06:29,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 11:06:29,512 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:29,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:29,512 INFO L82 PathProgramCache]: Analyzing trace with hash -408449205, now seen corresponding path program 36 times [2020-10-13 11:06:29,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:29,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982155618] [2020-10-13 11:06:29,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:29,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:29,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:29,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:29,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 11:06:29,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:29,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-13 11:06:29,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:29,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 11:06:29,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:06:29,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 11:06:29,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:29,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:29,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:29,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:29,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:29,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:29,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:29,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:29,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:29,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:29,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:29,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:29,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:29,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:29,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:29,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:29,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:29,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 11:06:29,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:29,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-13 11:06:29,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:29,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 11:06:29,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:29,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 11:06:29,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:29,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-13 11:06:29,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:29,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:29,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:29,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 11:06:29,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:29,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-13 11:06:29,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:29,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 11:06:29,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:06:29,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 11:06:29,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:29,869 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-13 11:06:29,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982155618] [2020-10-13 11:06:29,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:29,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 11:06:29,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849511153] [2020-10-13 11:06:29,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 11:06:29,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:29,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 11:06:29,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-13 11:06:29,870 INFO L87 Difference]: Start difference. First operand 321 states and 376 transitions. Second operand 13 states. [2020-10-13 11:06:30,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:30,173 INFO L93 Difference]: Finished difference Result 377 states and 442 transitions. [2020-10-13 11:06:30,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 11:06:30,173 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-10-13 11:06:30,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:30,178 INFO L225 Difference]: With dead ends: 377 [2020-10-13 11:06:30,178 INFO L226 Difference]: Without dead ends: 361 [2020-10-13 11:06:30,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-13 11:06:30,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-10-13 11:06:30,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 356. [2020-10-13 11:06:30,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2020-10-13 11:06:30,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 415 transitions. [2020-10-13 11:06:30,223 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 415 transitions. Word has length 46 [2020-10-13 11:06:30,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:30,224 INFO L479 AbstractCegarLoop]: Abstraction has 356 states and 415 transitions. [2020-10-13 11:06:30,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 11:06:30,224 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 415 transitions. [2020-10-13 11:06:30,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 11:06:30,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:30,228 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:06:30,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 11:06:30,228 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:30,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:30,229 INFO L82 PathProgramCache]: Analyzing trace with hash -767547790, now seen corresponding path program 37 times [2020-10-13 11:06:30,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:30,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387179155] [2020-10-13 11:06:30,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:30,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:30,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:30,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:30,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 11:06:30,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:30,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 296 [2020-10-13 11:06:30,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:30,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 11:06:30,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:06:30,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 11:06:30,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:30,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:30,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:30,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:30,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:30,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:30,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:30,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:30,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:30,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:30,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:30,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:30,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:30,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:30,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:30,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:30,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 11:06:30,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:30,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-13 11:06:30,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:30,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 11:06:30,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:30,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 11:06:30,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:30,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-13 11:06:30,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:30,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:30,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:30,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 11:06:30,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:30,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-13 11:06:30,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:30,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 11:06:30,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:30,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 11:06:30,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:31,023 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 11:06:31,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387179155] [2020-10-13 11:06:31,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:31,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 11:06:31,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034750128] [2020-10-13 11:06:31,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 11:06:31,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:31,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 11:06:31,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-10-13 11:06:31,024 INFO L87 Difference]: Start difference. First operand 356 states and 415 transitions. Second operand 24 states. [2020-10-13 11:06:31,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:31,683 INFO L93 Difference]: Finished difference Result 374 states and 437 transitions. [2020-10-13 11:06:31,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 11:06:31,684 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2020-10-13 11:06:31,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:31,688 INFO L225 Difference]: With dead ends: 374 [2020-10-13 11:06:31,688 INFO L226 Difference]: Without dead ends: 358 [2020-10-13 11:06:31,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=105, Invalid=1301, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 11:06:31,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-10-13 11:06:31,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 353. [2020-10-13 11:06:31,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2020-10-13 11:06:31,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 413 transitions. [2020-10-13 11:06:31,731 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 413 transitions. Word has length 46 [2020-10-13 11:06:31,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:31,732 INFO L479 AbstractCegarLoop]: Abstraction has 353 states and 413 transitions. [2020-10-13 11:06:31,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 11:06:31,732 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 413 transitions. [2020-10-13 11:06:31,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 11:06:31,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:31,736 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:06:31,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 11:06:31,736 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:31,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:31,737 INFO L82 PathProgramCache]: Analyzing trace with hash -772788601, now seen corresponding path program 38 times [2020-10-13 11:06:31,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:31,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791361402] [2020-10-13 11:06:31,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:31,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:31,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:31,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:31,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 11:06:31,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:31,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-13 11:06:31,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:31,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 11:06:31,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:06:31,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 11:06:31,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:31,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:31,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:31,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:31,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:31,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:31,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:31,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:31,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:31,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:31,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:31,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:31,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:31,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:31,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:31,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:31,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:31,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 11:06:31,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:31,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-13 11:06:31,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:31,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 11:06:31,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:31,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 11:06:31,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:31,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-13 11:06:31,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:31,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:32,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:32,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 11:06:32,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:32,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-13 11:06:32,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:32,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 11:06:32,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:06:32,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 11:06:32,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:32,090 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-13 11:06:32,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791361402] [2020-10-13 11:06:32,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:32,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 11:06:32,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743739910] [2020-10-13 11:06:32,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 11:06:32,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:32,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 11:06:32,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-13 11:06:32,092 INFO L87 Difference]: Start difference. First operand 353 states and 413 transitions. Second operand 13 states. [2020-10-13 11:06:32,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:32,377 INFO L93 Difference]: Finished difference Result 367 states and 426 transitions. [2020-10-13 11:06:32,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 11:06:32,378 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-10-13 11:06:32,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:32,381 INFO L225 Difference]: With dead ends: 367 [2020-10-13 11:06:32,381 INFO L226 Difference]: Without dead ends: 345 [2020-10-13 11:06:32,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-13 11:06:32,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-10-13 11:06:32,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 343. [2020-10-13 11:06:32,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-10-13 11:06:32,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 397 transitions. [2020-10-13 11:06:32,443 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 397 transitions. Word has length 46 [2020-10-13 11:06:32,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:32,443 INFO L479 AbstractCegarLoop]: Abstraction has 343 states and 397 transitions. [2020-10-13 11:06:32,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 11:06:32,443 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 397 transitions. [2020-10-13 11:06:32,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 11:06:32,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:32,447 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:06:32,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 11:06:32,447 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:32,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:32,447 INFO L82 PathProgramCache]: Analyzing trace with hash -76259425, now seen corresponding path program 39 times [2020-10-13 11:06:32,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:32,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325893110] [2020-10-13 11:06:32,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:32,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:32,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:32,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:32,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 11:06:32,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:32,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 218 [2020-10-13 11:06:32,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:32,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 11:06:32,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:06:32,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 11:06:32,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:32,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:32,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:32,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:32,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:32,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:32,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:32,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:32,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:32,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:32,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:32,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:32,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:32,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:32,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:32,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:32,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:32,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 11:06:32,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:32,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-13 11:06:32,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:32,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 11:06:32,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:32,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 11:06:32,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:32,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-13 11:06:32,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:32,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:32,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:32,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 11:06:32,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:32,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-13 11:06:32,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:32,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 11:06:32,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:06:32,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 11:06:32,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:33,064 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 11:06:33,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325893110] [2020-10-13 11:06:33,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:33,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 11:06:33,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722663639] [2020-10-13 11:06:33,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 11:06:33,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:33,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 11:06:33,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-13 11:06:33,065 INFO L87 Difference]: Start difference. First operand 343 states and 397 transitions. Second operand 19 states. [2020-10-13 11:06:33,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:33,672 INFO L93 Difference]: Finished difference Result 409 states and 476 transitions. [2020-10-13 11:06:33,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 11:06:33,673 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2020-10-13 11:06:33,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:33,676 INFO L225 Difference]: With dead ends: 409 [2020-10-13 11:06:33,676 INFO L226 Difference]: Without dead ends: 395 [2020-10-13 11:06:33,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-10-13 11:06:33,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-10-13 11:06:33,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 386. [2020-10-13 11:06:33,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2020-10-13 11:06:33,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 448 transitions. [2020-10-13 11:06:33,726 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 448 transitions. Word has length 47 [2020-10-13 11:06:33,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:33,726 INFO L479 AbstractCegarLoop]: Abstraction has 386 states and 448 transitions. [2020-10-13 11:06:33,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 11:06:33,727 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 448 transitions. [2020-10-13 11:06:33,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 11:06:33,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:33,731 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:06:33,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 11:06:33,731 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:33,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:33,732 INFO L82 PathProgramCache]: Analyzing trace with hash -514301896, now seen corresponding path program 40 times [2020-10-13 11:06:33,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:33,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044658276] [2020-10-13 11:06:33,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:33,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:33,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:33,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:33,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 11:06:33,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:33,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-13 11:06:33,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:33,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 11:06:33,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:06:33,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 11:06:33,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:33,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:33,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:33,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:33,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:33,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:33,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:33,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:33,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:33,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:33,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:33,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:33,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:33,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:33,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:33,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:34,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:34,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 11:06:34,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:34,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-13 11:06:34,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:34,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 11:06:34,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:34,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 11:06:34,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:34,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-13 11:06:34,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:34,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:34,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:34,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 11:06:34,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:34,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-13 11:06:34,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:34,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 11:06:34,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:06:34,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 11:06:34,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:34,323 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 11:06:34,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044658276] [2020-10-13 11:06:34,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:34,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 11:06:34,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421153797] [2020-10-13 11:06:34,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 11:06:34,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:34,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 11:06:34,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-13 11:06:34,325 INFO L87 Difference]: Start difference. First operand 386 states and 448 transitions. Second operand 19 states. [2020-10-13 11:06:34,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:34,954 INFO L93 Difference]: Finished difference Result 401 states and 463 transitions. [2020-10-13 11:06:34,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 11:06:34,956 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2020-10-13 11:06:34,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:34,966 INFO L225 Difference]: With dead ends: 401 [2020-10-13 11:06:34,966 INFO L226 Difference]: Without dead ends: 389 [2020-10-13 11:06:34,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2020-10-13 11:06:34,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-10-13 11:06:35,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 387. [2020-10-13 11:06:35,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2020-10-13 11:06:35,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 446 transitions. [2020-10-13 11:06:35,045 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 446 transitions. Word has length 47 [2020-10-13 11:06:35,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:35,045 INFO L479 AbstractCegarLoop]: Abstraction has 387 states and 446 transitions. [2020-10-13 11:06:35,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 11:06:35,046 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 446 transitions. [2020-10-13 11:06:35,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 11:06:35,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:35,053 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:06:35,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 11:06:35,053 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:35,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:35,054 INFO L82 PathProgramCache]: Analyzing trace with hash 704504217, now seen corresponding path program 41 times [2020-10-13 11:06:35,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:35,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488209889] [2020-10-13 11:06:35,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:35,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:35,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:35,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:35,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 11:06:35,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:35,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 224 [2020-10-13 11:06:35,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:35,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 11:06:35,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 11:06:35,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 11:06:35,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:06:35,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:35,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:35,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:35,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:35,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:35,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:35,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:35,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:35,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:35,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:35,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:35,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:06:35,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:35,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:35,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:35,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:35,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 11:06:35,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:35,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 11:06:35,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:35,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:35,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:35,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:35,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:06:35,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-13 11:06:35,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:35,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:35,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:35,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 11:06:35,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:35,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-13 11:06:35,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:35,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 11:06:35,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:06:35,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 11:06:35,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:06:35,480 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 11:06:35,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488209889] [2020-10-13 11:06:35,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:35,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 11:06:35,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590849255] [2020-10-13 11:06:35,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 11:06:35,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:35,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 11:06:35,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-13 11:06:35,482 INFO L87 Difference]: Start difference. First operand 387 states and 446 transitions. Second operand 11 states. [2020-10-13 11:06:35,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:35,674 INFO L93 Difference]: Finished difference Result 413 states and 476 transitions. [2020-10-13 11:06:35,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 11:06:35,675 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2020-10-13 11:06:35,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:35,678 INFO L225 Difference]: With dead ends: 413 [2020-10-13 11:06:35,678 INFO L226 Difference]: Without dead ends: 386 [2020-10-13 11:06:35,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=265, Unknown=0, NotChecked=0, Total=420 [2020-10-13 11:06:35,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-10-13 11:06:35,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 374. [2020-10-13 11:06:35,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2020-10-13 11:06:35,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 427 transitions. [2020-10-13 11:06:35,732 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 427 transitions. Word has length 47 [2020-10-13 11:06:35,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:35,732 INFO L479 AbstractCegarLoop]: Abstraction has 374 states and 427 transitions. [2020-10-13 11:06:35,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 11:06:35,732 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 427 transitions. [2020-10-13 11:06:35,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 11:06:35,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:35,736 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:06:35,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 11:06:35,737 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:35,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:35,737 INFO L82 PathProgramCache]: Analyzing trace with hash 551076162, now seen corresponding path program 42 times [2020-10-13 11:06:35,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:35,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033207770] [2020-10-13 11:06:35,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:35,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:35,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:35,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:35,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 11:06:35,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:35,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-13 11:06:35,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:35,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 11:06:35,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:06:35,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 11:06:35,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:35,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:35,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:35,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:35,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:35,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:35,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:35,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:35,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:35,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:35,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:35,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:35,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:35,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:35,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:35,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:35,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:35,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 11:06:35,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:35,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-13 11:06:35,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:35,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 11:06:35,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:06:35,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 11:06:35,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:35,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-13 11:06:35,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:35,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:35,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:35,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 11:06:35,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:35,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 11:06:35,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:35,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:35,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 11:06:35,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:35,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:35,970 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 11:06:35,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033207770] [2020-10-13 11:06:35,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:35,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 11:06:35,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376967555] [2020-10-13 11:06:35,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 11:06:35,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:35,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 11:06:35,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-13 11:06:35,971 INFO L87 Difference]: Start difference. First operand 374 states and 427 transitions. Second operand 11 states. [2020-10-13 11:06:36,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:36,159 INFO L93 Difference]: Finished difference Result 590 states and 667 transitions. [2020-10-13 11:06:36,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 11:06:36,160 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2020-10-13 11:06:36,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:36,162 INFO L225 Difference]: With dead ends: 590 [2020-10-13 11:06:36,163 INFO L226 Difference]: Without dead ends: 381 [2020-10-13 11:06:36,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=265, Unknown=0, NotChecked=0, Total=420 [2020-10-13 11:06:36,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2020-10-13 11:06:36,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 381. [2020-10-13 11:06:36,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381 states. [2020-10-13 11:06:36,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 434 transitions. [2020-10-13 11:06:36,213 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 434 transitions. Word has length 47 [2020-10-13 11:06:36,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:36,214 INFO L479 AbstractCegarLoop]: Abstraction has 381 states and 434 transitions. [2020-10-13 11:06:36,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 11:06:36,214 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 434 transitions. [2020-10-13 11:06:36,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 11:06:36,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:36,218 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:06:36,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 11:06:36,218 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:36,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:36,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1201238553, now seen corresponding path program 43 times [2020-10-13 11:06:36,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:36,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016357585] [2020-10-13 11:06:36,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:36,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:36,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:36,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:36,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 11:06:36,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:36,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 470 [2020-10-13 11:06:36,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:36,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 11:06:36,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:06:36,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 11:06:36,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:36,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:36,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:36,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:36,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:36,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:36,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:36,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:06:36,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:36,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:36,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:36,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:36,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:06:36,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:36,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:36,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:36,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:36,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 11:06:36,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:36,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-13 11:06:36,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:36,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 11:06:36,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:36,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 11:06:36,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:37,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-13 11:06:37,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:37,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:37,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:37,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 11:06:37,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:37,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-13 11:06:37,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:37,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 11:06:37,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:37,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 11:06:37,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:37,644 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:06:37,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016357585] [2020-10-13 11:06:37,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:37,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 11:06:37,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352767179] [2020-10-13 11:06:37,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 11:06:37,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:37,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 11:06:37,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-10-13 11:06:37,648 INFO L87 Difference]: Start difference. First operand 381 states and 434 transitions. Second operand 30 states. [2020-10-13 11:06:38,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:38,690 INFO L93 Difference]: Finished difference Result 459 states and 523 transitions. [2020-10-13 11:06:38,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 11:06:38,691 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 48 [2020-10-13 11:06:38,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:38,695 INFO L225 Difference]: With dead ends: 459 [2020-10-13 11:06:38,695 INFO L226 Difference]: Without dead ends: 453 [2020-10-13 11:06:38,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=101, Invalid=1459, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 11:06:38,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2020-10-13 11:06:38,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 397. [2020-10-13 11:06:38,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2020-10-13 11:06:38,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 453 transitions. [2020-10-13 11:06:38,749 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 453 transitions. Word has length 48 [2020-10-13 11:06:38,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:38,749 INFO L479 AbstractCegarLoop]: Abstraction has 397 states and 453 transitions. [2020-10-13 11:06:38,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 11:06:38,749 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 453 transitions. [2020-10-13 11:06:38,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 11:06:38,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:38,753 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:06:38,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 11:06:38,754 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:38,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:38,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1180334297, now seen corresponding path program 44 times [2020-10-13 11:06:38,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:38,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855713549] [2020-10-13 11:06:38,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:38,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:38,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:39,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:39,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 11:06:39,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:39,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 278 [2020-10-13 11:06:39,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:39,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 11:06:39,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:06:39,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 11:06:39,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:39,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:39,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:39,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:39,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:39,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:39,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:39,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:39,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:39,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:39,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:39,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:39,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:39,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:39,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:39,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:39,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 11:06:39,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:39,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-13 11:06:39,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:39,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 11:06:39,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:39,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 11:06:39,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:39,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-13 11:06:39,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:39,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:39,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:39,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 11:06:39,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:39,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-13 11:06:39,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:39,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 11:06:39,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:39,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 11:06:39,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 11:06:39,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855713549] [2020-10-13 11:06:39,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:39,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 11:06:39,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800290556] [2020-10-13 11:06:39,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 11:06:39,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:39,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 11:06:39,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-10-13 11:06:39,729 INFO L87 Difference]: Start difference. First operand 397 states and 453 transitions. Second operand 28 states. [2020-10-13 11:06:40,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:40,663 INFO L93 Difference]: Finished difference Result 403 states and 458 transitions. [2020-10-13 11:06:40,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 11:06:40,664 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 48 [2020-10-13 11:06:40,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:40,666 INFO L225 Difference]: With dead ends: 403 [2020-10-13 11:06:40,667 INFO L226 Difference]: Without dead ends: 381 [2020-10-13 11:06:40,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=105, Invalid=1455, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 11:06:40,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2020-10-13 11:06:40,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 381. [2020-10-13 11:06:40,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381 states. [2020-10-13 11:06:40,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 435 transitions. [2020-10-13 11:06:40,715 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 435 transitions. Word has length 48 [2020-10-13 11:06:40,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:40,716 INFO L479 AbstractCegarLoop]: Abstraction has 381 states and 435 transitions. [2020-10-13 11:06:40,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 11:06:40,716 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 435 transitions. [2020-10-13 11:06:40,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 11:06:40,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:40,719 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-13 11:06:40,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-13 11:06:40,719 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:40,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:40,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1281576423, now seen corresponding path program 45 times [2020-10-13 11:06:40,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:40,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778390635] [2020-10-13 11:06:40,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:40,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:40,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:41,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:41,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 11:06:41,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:41,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279 [2020-10-13 11:06:41,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:41,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 11:06:41,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:06:41,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 11:06:41,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:41,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:41,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:41,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:41,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:41,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:41,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:41,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:41,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:41,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:41,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:41,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:41,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:41,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:41,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:41,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:41,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:41,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 11:06:41,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:41,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-13 11:06:41,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:41,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 11:06:41,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:41,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 11:06:41,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:41,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-13 11:06:41,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:41,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:41,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:41,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 11:06:41,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:41,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-13 11:06:41,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:41,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 11:06:41,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:41,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 11:06:41,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:41,637 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 11:06:41,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778390635] [2020-10-13 11:06:41,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:41,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 11:06:41,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136056330] [2020-10-13 11:06:41,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 11:06:41,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:41,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 11:06:41,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-10-13 11:06:41,639 INFO L87 Difference]: Start difference. First operand 381 states and 435 transitions. Second operand 26 states. [2020-10-13 11:06:42,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:42,468 INFO L93 Difference]: Finished difference Result 387 states and 440 transitions. [2020-10-13 11:06:42,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 11:06:42,469 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 48 [2020-10-13 11:06:42,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:42,471 INFO L225 Difference]: With dead ends: 387 [2020-10-13 11:06:42,472 INFO L226 Difference]: Without dead ends: 363 [2020-10-13 11:06:42,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=109, Invalid=1451, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 11:06:42,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-10-13 11:06:42,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 363. [2020-10-13 11:06:42,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2020-10-13 11:06:42,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 415 transitions. [2020-10-13 11:06:42,509 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 415 transitions. Word has length 48 [2020-10-13 11:06:42,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:42,509 INFO L479 AbstractCegarLoop]: Abstraction has 363 states and 415 transitions. [2020-10-13 11:06:42,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 11:06:42,510 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 415 transitions. [2020-10-13 11:06:42,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 11:06:42,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:42,513 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:06:42,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-13 11:06:42,513 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:42,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:42,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1596835623, now seen corresponding path program 46 times [2020-10-13 11:06:42,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:42,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625579478] [2020-10-13 11:06:42,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:42,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:42,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:42,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:42,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 11:06:42,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:42,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 252 [2020-10-13 11:06:42,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:42,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 11:06:42,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:06:42,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 11:06:42,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:42,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:42,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:42,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:42,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:42,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:42,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:42,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:42,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:42,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:42,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:42,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:42,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:42,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:42,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:42,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:42,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:42,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 11:06:42,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:42,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-13 11:06:42,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:42,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 11:06:42,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:42,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 11:06:42,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:43,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-13 11:06:43,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:43,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:43,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:43,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 11:06:43,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:43,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-13 11:06:43,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:43,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 11:06:43,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:43,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 11:06:43,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:43,326 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-13 11:06:43,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625579478] [2020-10-13 11:06:43,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:43,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 11:06:43,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12391307] [2020-10-13 11:06:43,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 11:06:43,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:43,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 11:06:43,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-10-13 11:06:43,327 INFO L87 Difference]: Start difference. First operand 363 states and 415 transitions. Second operand 24 states. [2020-10-13 11:06:44,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:44,047 INFO L93 Difference]: Finished difference Result 381 states and 436 transitions. [2020-10-13 11:06:44,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 11:06:44,047 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 48 [2020-10-13 11:06:44,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:44,050 INFO L225 Difference]: With dead ends: 381 [2020-10-13 11:06:44,050 INFO L226 Difference]: Without dead ends: 375 [2020-10-13 11:06:44,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 11:06:44,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-10-13 11:06:44,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 373. [2020-10-13 11:06:44,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373 states. [2020-10-13 11:06:44,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 428 transitions. [2020-10-13 11:06:44,093 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 428 transitions. Word has length 48 [2020-10-13 11:06:44,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:44,093 INFO L479 AbstractCegarLoop]: Abstraction has 373 states and 428 transitions. [2020-10-13 11:06:44,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 11:06:44,094 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 428 transitions. [2020-10-13 11:06:44,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 11:06:44,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:44,097 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:06:44,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-13 11:06:44,098 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:44,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:44,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1451582376, now seen corresponding path program 47 times [2020-10-13 11:06:44,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:44,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514982845] [2020-10-13 11:06:44,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:44,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:44,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:44,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:44,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 11:06:44,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:44,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 230 [2020-10-13 11:06:44,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:44,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 11:06:44,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:06:44,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 11:06:44,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:44,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:44,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:44,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:44,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:44,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:44,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:44,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:44,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:44,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:44,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:44,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:44,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:44,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:44,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:44,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:44,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:44,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 11:06:44,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:44,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-13 11:06:44,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:44,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 11:06:44,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:44,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 11:06:44,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:44,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-13 11:06:44,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:44,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:44,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:44,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 11:06:44,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:44,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-13 11:06:44,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:44,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 11:06:44,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:06:44,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 11:06:44,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:44,735 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 11:06:44,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514982845] [2020-10-13 11:06:44,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:44,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 11:06:44,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937685474] [2020-10-13 11:06:44,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 11:06:44,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:44,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 11:06:44,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-13 11:06:44,736 INFO L87 Difference]: Start difference. First operand 373 states and 428 transitions. Second operand 21 states. [2020-10-13 11:06:45,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:45,551 INFO L93 Difference]: Finished difference Result 441 states and 509 transitions. [2020-10-13 11:06:45,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 11:06:45,553 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 49 [2020-10-13 11:06:45,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:45,556 INFO L225 Difference]: With dead ends: 441 [2020-10-13 11:06:45,556 INFO L226 Difference]: Without dead ends: 427 [2020-10-13 11:06:45,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2020-10-13 11:06:45,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2020-10-13 11:06:45,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 418. [2020-10-13 11:06:45,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 418 states. [2020-10-13 11:06:45,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 481 transitions. [2020-10-13 11:06:45,616 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 481 transitions. Word has length 49 [2020-10-13 11:06:45,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:45,617 INFO L479 AbstractCegarLoop]: Abstraction has 418 states and 481 transitions. [2020-10-13 11:06:45,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 11:06:45,617 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 481 transitions. [2020-10-13 11:06:45,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 11:06:45,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:45,622 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:06:45,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-13 11:06:45,623 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:45,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:45,623 INFO L82 PathProgramCache]: Analyzing trace with hash -2145997089, now seen corresponding path program 48 times [2020-10-13 11:06:45,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:45,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415106971] [2020-10-13 11:06:45,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:45,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:45,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:46,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:46,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 11:06:46,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:46,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 362 [2020-10-13 11:06:46,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:46,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 11:06:46,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:06:46,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 11:06:46,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:46,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:46,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:46,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:46,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:46,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:46,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:46,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:46,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:46,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:46,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:46,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:46,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:46,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:46,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:46,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:46,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:46,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 11:06:46,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:46,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-13 11:06:46,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:46,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 11:06:46,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:46,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 11:06:46,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:46,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-13 11:06:46,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:46,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:46,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:46,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 11:06:46,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:46,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-13 11:06:46,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:46,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 11:06:46,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:06:46,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 11:06:46,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:46,412 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 11:06:46,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415106971] [2020-10-13 11:06:46,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:46,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 11:06:46,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558048382] [2020-10-13 11:06:46,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 11:06:46,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:46,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 11:06:46,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-13 11:06:46,414 INFO L87 Difference]: Start difference. First operand 418 states and 481 transitions. Second operand 21 states. [2020-10-13 11:06:47,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:47,182 INFO L93 Difference]: Finished difference Result 433 states and 496 transitions. [2020-10-13 11:06:47,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 11:06:47,183 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 49 [2020-10-13 11:06:47,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:47,186 INFO L225 Difference]: With dead ends: 433 [2020-10-13 11:06:47,187 INFO L226 Difference]: Without dead ends: 421 [2020-10-13 11:06:47,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2020-10-13 11:06:47,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-10-13 11:06:47,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 419. [2020-10-13 11:06:47,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2020-10-13 11:06:47,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 479 transitions. [2020-10-13 11:06:47,256 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 479 transitions. Word has length 49 [2020-10-13 11:06:47,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:47,256 INFO L479 AbstractCegarLoop]: Abstraction has 419 states and 479 transitions. [2020-10-13 11:06:47,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 11:06:47,256 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 479 transitions. [2020-10-13 11:06:47,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 11:06:47,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:47,260 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:06:47,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-13 11:06:47,260 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:47,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:47,260 INFO L82 PathProgramCache]: Analyzing trace with hash 537375778, now seen corresponding path program 49 times [2020-10-13 11:06:47,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:47,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276360836] [2020-10-13 11:06:47,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:47,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:47,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:47,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:47,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 11:06:47,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:47,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-13 11:06:47,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:47,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 11:06:47,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:06:47,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 11:06:47,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:47,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:47,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:47,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:47,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:47,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:47,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:47,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:47,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:47,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:47,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:47,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:47,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:47,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:47,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:47,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:47,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:47,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 11:06:47,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:47,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-13 11:06:47,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:47,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 11:06:47,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:06:47,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 11:06:47,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:47,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-13 11:06:47,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:47,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:47,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:47,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 11:06:47,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:47,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 11:06:47,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:47,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:47,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 11:06:47,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:47,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:47,501 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 11:06:47,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276360836] [2020-10-13 11:06:47,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:47,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 11:06:47,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361272173] [2020-10-13 11:06:47,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 11:06:47,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:47,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 11:06:47,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-13 11:06:47,502 INFO L87 Difference]: Start difference. First operand 419 states and 479 transitions. Second operand 12 states. [2020-10-13 11:06:47,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:47,761 INFO L93 Difference]: Finished difference Result 740 states and 845 transitions. [2020-10-13 11:06:47,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 11:06:47,762 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-10-13 11:06:47,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:47,765 INFO L225 Difference]: With dead ends: 740 [2020-10-13 11:06:47,765 INFO L226 Difference]: Without dead ends: 501 [2020-10-13 11:06:47,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2020-10-13 11:06:47,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2020-10-13 11:06:47,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 477. [2020-10-13 11:06:47,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2020-10-13 11:06:47,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 546 transitions. [2020-10-13 11:06:47,847 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 546 transitions. Word has length 49 [2020-10-13 11:06:47,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:47,847 INFO L479 AbstractCegarLoop]: Abstraction has 477 states and 546 transitions. [2020-10-13 11:06:47,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 11:06:47,847 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 546 transitions. [2020-10-13 11:06:47,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 11:06:47,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:47,851 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:06:47,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-13 11:06:47,851 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:47,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:47,851 INFO L82 PathProgramCache]: Analyzing trace with hash 76073369, now seen corresponding path program 50 times [2020-10-13 11:06:47,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:47,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322798558] [2020-10-13 11:06:47,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:47,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:47,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:48,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:48,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 11:06:48,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:48,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 183 [2020-10-13 11:06:48,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:48,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 11:06:48,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 11:06:48,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 11:06:48,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:48,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:48,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:48,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:48,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:48,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:48,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:48,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:48,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:48,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:48,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:48,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:48,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:48,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:48,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:48,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:48,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:48,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 11:06:48,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:48,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 11:06:48,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:48,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:48,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:48,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:48,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:48,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-13 11:06:48,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:48,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:48,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:48,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 11:06:48,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:48,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-13 11:06:48,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:48,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 11:06:48,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:06:48,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 11:06:48,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:48,177 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 11:06:48,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322798558] [2020-10-13 11:06:48,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:48,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 11:06:48,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241873188] [2020-10-13 11:06:48,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 11:06:48,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:48,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 11:06:48,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-13 11:06:48,178 INFO L87 Difference]: Start difference. First operand 477 states and 546 transitions. Second operand 12 states. [2020-10-13 11:06:48,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:48,455 INFO L93 Difference]: Finished difference Result 597 states and 691 transitions. [2020-10-13 11:06:48,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 11:06:48,456 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-10-13 11:06:48,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:48,459 INFO L225 Difference]: With dead ends: 597 [2020-10-13 11:06:48,459 INFO L226 Difference]: Without dead ends: 559 [2020-10-13 11:06:48,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2020-10-13 11:06:48,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2020-10-13 11:06:48,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 535. [2020-10-13 11:06:48,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 535 states. [2020-10-13 11:06:48,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 613 transitions. [2020-10-13 11:06:48,537 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 613 transitions. Word has length 49 [2020-10-13 11:06:48,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:48,537 INFO L479 AbstractCegarLoop]: Abstraction has 535 states and 613 transitions. [2020-10-13 11:06:48,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 11:06:48,537 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 613 transitions. [2020-10-13 11:06:48,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 11:06:48,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:48,541 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:06:48,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-13 11:06:48,542 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:48,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:48,542 INFO L82 PathProgramCache]: Analyzing trace with hash -2136672174, now seen corresponding path program 51 times [2020-10-13 11:06:48,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:48,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072797839] [2020-10-13 11:06:48,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:48,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:48,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:48,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:48,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 11:06:48,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:48,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 368 [2020-10-13 11:06:48,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:48,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 11:06:48,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:06:48,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 11:06:48,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:48,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:48,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:48,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:48,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:48,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:48,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:48,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:48,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:48,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:48,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:48,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:48,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:48,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:48,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:48,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:49,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:49,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 11:06:49,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:49,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-13 11:06:49,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:49,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 11:06:49,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:49,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 11:06:49,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:49,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-13 11:06:49,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:49,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:49,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:49,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 11:06:49,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:49,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-13 11:06:49,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:49,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 11:06:49,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:49,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 11:06:49,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:49,721 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:06:49,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072797839] [2020-10-13 11:06:49,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:49,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 11:06:49,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284491690] [2020-10-13 11:06:49,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 11:06:49,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:49,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 11:06:49,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2020-10-13 11:06:49,722 INFO L87 Difference]: Start difference. First operand 535 states and 613 transitions. Second operand 32 states. [2020-10-13 11:06:50,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:50,934 INFO L93 Difference]: Finished difference Result 627 states and 718 transitions. [2020-10-13 11:06:50,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 11:06:50,935 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 50 [2020-10-13 11:06:50,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:50,939 INFO L225 Difference]: With dead ends: 627 [2020-10-13 11:06:50,939 INFO L226 Difference]: Without dead ends: 621 [2020-10-13 11:06:50,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=105, Invalid=1617, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 11:06:50,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2020-10-13 11:06:51,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 551. [2020-10-13 11:06:51,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 551 states. [2020-10-13 11:06:51,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 632 transitions. [2020-10-13 11:06:51,012 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 632 transitions. Word has length 50 [2020-10-13 11:06:51,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:51,013 INFO L479 AbstractCegarLoop]: Abstraction has 551 states and 632 transitions. [2020-10-13 11:06:51,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 11:06:51,013 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 632 transitions. [2020-10-13 11:06:51,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 11:06:51,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:51,015 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:06:51,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-13 11:06:51,015 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:51,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:51,015 INFO L82 PathProgramCache]: Analyzing trace with hash 36260018, now seen corresponding path program 52 times [2020-10-13 11:06:51,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:51,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367180846] [2020-10-13 11:06:51,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:51,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:51,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:51,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:51,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 11:06:51,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:51,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 308 [2020-10-13 11:06:51,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:51,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 11:06:51,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:06:51,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 11:06:51,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:51,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:51,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:51,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:51,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:51,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:51,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:51,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:51,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:51,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:51,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:51,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:51,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:06:51,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:51,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:51,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:51,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:51,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 11:06:51,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:51,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-13 11:06:51,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:51,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 11:06:51,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:51,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 11:06:51,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:51,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-13 11:06:51,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:51,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:51,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:51,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 11:06:51,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:51,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-13 11:06:51,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:51,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 11:06:51,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:51,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 11:06:51,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:52,121 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 11:06:52,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367180846] [2020-10-13 11:06:52,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:52,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 11:06:52,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866255316] [2020-10-13 11:06:52,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 11:06:52,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:52,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 11:06:52,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-10-13 11:06:52,123 INFO L87 Difference]: Start difference. First operand 551 states and 632 transitions. Second operand 30 states. [2020-10-13 11:06:53,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:53,189 INFO L93 Difference]: Finished difference Result 557 states and 637 transitions. [2020-10-13 11:06:53,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 11:06:53,189 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 50 [2020-10-13 11:06:53,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:53,193 INFO L225 Difference]: With dead ends: 557 [2020-10-13 11:06:53,193 INFO L226 Difference]: Without dead ends: 535 [2020-10-13 11:06:53,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=109, Invalid=1613, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 11:06:53,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2020-10-13 11:06:53,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 535. [2020-10-13 11:06:53,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 535 states. [2020-10-13 11:06:53,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 614 transitions. [2020-10-13 11:06:53,262 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 614 transitions. Word has length 50 [2020-10-13 11:06:53,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:53,262 INFO L479 AbstractCegarLoop]: Abstraction has 535 states and 614 transitions. [2020-10-13 11:06:53,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 11:06:53,263 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 614 transitions. [2020-10-13 11:06:53,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 11:06:53,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:53,265 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:06:53,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-13 11:06:53,265 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:53,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:53,265 INFO L82 PathProgramCache]: Analyzing trace with hash 873190610, now seen corresponding path program 53 times [2020-10-13 11:06:53,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:53,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332302799] [2020-10-13 11:06:53,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:53,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:53,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:53,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:53,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 11:06:53,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:53,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 333 [2020-10-13 11:06:53,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:53,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 11:06:53,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:06:53,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 11:06:53,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:53,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:53,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:53,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:53,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:53,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:53,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:53,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:53,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:53,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:53,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:53,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:53,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:53,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:53,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:53,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:53,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:53,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 11:06:53,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:53,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-13 11:06:53,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:53,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 11:06:53,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:53,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 11:06:53,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:53,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-13 11:06:53,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:53,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:53,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:53,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 11:06:53,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:53,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-13 11:06:53,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:53,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 11:06:53,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:53,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 11:06:53,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:54,321 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 11:06:54,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332302799] [2020-10-13 11:06:54,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:54,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 11:06:54,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684474719] [2020-10-13 11:06:54,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 11:06:54,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:54,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 11:06:54,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-10-13 11:06:54,322 INFO L87 Difference]: Start difference. First operand 535 states and 614 transitions. Second operand 28 states. [2020-10-13 11:06:55,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:55,297 INFO L93 Difference]: Finished difference Result 541 states and 619 transitions. [2020-10-13 11:06:55,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 11:06:55,298 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 50 [2020-10-13 11:06:55,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:55,301 INFO L225 Difference]: With dead ends: 541 [2020-10-13 11:06:55,301 INFO L226 Difference]: Without dead ends: 517 [2020-10-13 11:06:55,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=113, Invalid=1609, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 11:06:55,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2020-10-13 11:06:55,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 517. [2020-10-13 11:06:55,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 517 states. [2020-10-13 11:06:55,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 594 transitions. [2020-10-13 11:06:55,366 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 594 transitions. Word has length 50 [2020-10-13 11:06:55,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:55,366 INFO L479 AbstractCegarLoop]: Abstraction has 517 states and 594 transitions. [2020-10-13 11:06:55,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 11:06:55,367 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 594 transitions. [2020-10-13 11:06:55,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 11:06:55,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:55,368 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:06:55,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-13 11:06:55,369 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:55,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:55,369 INFO L82 PathProgramCache]: Analyzing trace with hash -423467705, now seen corresponding path program 54 times [2020-10-13 11:06:55,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:55,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628056246] [2020-10-13 11:06:55,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:55,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:55,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:55,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:55,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 11:06:55,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:55,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-13 11:06:55,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:55,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 11:06:55,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:06:55,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 11:06:55,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:55,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:55,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:55,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:55,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:55,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:55,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:55,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:55,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:55,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:55,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:55,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:55,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:55,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:55,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:55,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:55,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 11:06:55,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:55,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-13 11:06:55,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:55,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 11:06:55,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:55,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 11:06:55,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:55,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-13 11:06:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:55,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:55,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:55,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 11:06:55,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:55,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-13 11:06:55,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:55,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 11:06:55,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:06:55,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 11:06:55,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:55,793 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-13 11:06:55,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628056246] [2020-10-13 11:06:55,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:55,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 11:06:55,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436241591] [2020-10-13 11:06:55,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 11:06:55,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:55,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 11:06:55,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-13 11:06:55,795 INFO L87 Difference]: Start difference. First operand 517 states and 594 transitions. Second operand 15 states. [2020-10-13 11:06:56,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:56,260 INFO L93 Difference]: Finished difference Result 589 states and 680 transitions. [2020-10-13 11:06:56,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 11:06:56,261 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2020-10-13 11:06:56,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:56,266 INFO L225 Difference]: With dead ends: 589 [2020-10-13 11:06:56,266 INFO L226 Difference]: Without dead ends: 572 [2020-10-13 11:06:56,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-10-13 11:06:56,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2020-10-13 11:06:56,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 567. [2020-10-13 11:06:56,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 567 states. [2020-10-13 11:06:56,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 650 transitions. [2020-10-13 11:06:56,330 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 650 transitions. Word has length 50 [2020-10-13 11:06:56,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:56,330 INFO L479 AbstractCegarLoop]: Abstraction has 567 states and 650 transitions. [2020-10-13 11:06:56,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 11:06:56,330 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 650 transitions. [2020-10-13 11:06:56,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 11:06:56,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:56,333 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:06:56,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-13 11:06:56,333 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:56,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:56,333 INFO L82 PathProgramCache]: Analyzing trace with hash 2088889394, now seen corresponding path program 55 times [2020-10-13 11:06:56,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:56,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949568363] [2020-10-13 11:06:56,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:56,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:56,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:56,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:56,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 11:06:56,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:56,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 296 [2020-10-13 11:06:56,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:56,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 11:06:56,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:06:56,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 11:06:56,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:56,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:56,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:56,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:56,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:56,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:56,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:56,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:56,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:56,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:56,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:56,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:56,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:56,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:56,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:56,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:56,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 11:06:56,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:56,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-13 11:06:56,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:56,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 11:06:56,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:56,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 11:06:56,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:56,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-13 11:06:56,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:56,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:56,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:56,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 11:06:56,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:56,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-13 11:06:56,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:56,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 11:06:56,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:56,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 11:06:56,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:57,268 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-13 11:06:57,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949568363] [2020-10-13 11:06:57,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:57,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 11:06:57,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475129245] [2020-10-13 11:06:57,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 11:06:57,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:57,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 11:06:57,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-10-13 11:06:57,270 INFO L87 Difference]: Start difference. First operand 567 states and 650 transitions. Second operand 26 states. [2020-10-13 11:06:58,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:58,124 INFO L93 Difference]: Finished difference Result 585 states and 672 transitions. [2020-10-13 11:06:58,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 11:06:58,124 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2020-10-13 11:06:58,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:58,128 INFO L225 Difference]: With dead ends: 585 [2020-10-13 11:06:58,128 INFO L226 Difference]: Without dead ends: 568 [2020-10-13 11:06:58,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=117, Invalid=1605, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 11:06:58,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2020-10-13 11:06:58,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 563. [2020-10-13 11:06:58,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 563 states. [2020-10-13 11:06:58,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 647 transitions. [2020-10-13 11:06:58,194 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 647 transitions. Word has length 50 [2020-10-13 11:06:58,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:58,194 INFO L479 AbstractCegarLoop]: Abstraction has 563 states and 647 transitions. [2020-10-13 11:06:58,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 11:06:58,194 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 647 transitions. [2020-10-13 11:06:58,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 11:06:58,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:58,198 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:06:58,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-13 11:06:58,199 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:58,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:58,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1544738101, now seen corresponding path program 56 times [2020-10-13 11:06:58,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:58,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247930473] [2020-10-13 11:06:58,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:58,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:58,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:58,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:58,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 11:06:58,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:58,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-13 11:06:58,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:58,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 11:06:58,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:06:58,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 11:06:58,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:58,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:58,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:58,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:58,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:58,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:58,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:58,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:58,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:58,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:58,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:58,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:58,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:58,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:58,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:58,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:58,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:58,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 11:06:58,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:58,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-13 11:06:58,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:58,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 11:06:58,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:58,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 11:06:58,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:58,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-13 11:06:58,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:58,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:58,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:58,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 11:06:58,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:58,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-13 11:06:58,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:58,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 11:06:58,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:06:58,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 11:06:58,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:58,676 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-13 11:06:58,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247930473] [2020-10-13 11:06:58,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:58,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 11:06:58,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038444194] [2020-10-13 11:06:58,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 11:06:58,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:58,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 11:06:58,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-13 11:06:58,678 INFO L87 Difference]: Start difference. First operand 563 states and 647 transitions. Second operand 15 states. [2020-10-13 11:06:59,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:59,110 INFO L93 Difference]: Finished difference Result 577 states and 660 transitions. [2020-10-13 11:06:59,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 11:06:59,111 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2020-10-13 11:06:59,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:59,115 INFO L225 Difference]: With dead ends: 577 [2020-10-13 11:06:59,115 INFO L226 Difference]: Without dead ends: 553 [2020-10-13 11:06:59,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-13 11:06:59,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2020-10-13 11:06:59,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 551. [2020-10-13 11:06:59,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 551 states. [2020-10-13 11:06:59,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 627 transitions. [2020-10-13 11:06:59,178 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 627 transitions. Word has length 50 [2020-10-13 11:06:59,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:59,178 INFO L479 AbstractCegarLoop]: Abstraction has 551 states and 627 transitions. [2020-10-13 11:06:59,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 11:06:59,178 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 627 transitions. [2020-10-13 11:06:59,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 11:06:59,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:59,181 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:06:59,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-13 11:06:59,181 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:59,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:59,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1847599809, now seen corresponding path program 57 times [2020-10-13 11:06:59,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:59,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824956744] [2020-10-13 11:06:59,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:59,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:59,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:59,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:59,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 11:06:59,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:59,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 230 [2020-10-13 11:06:59,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:59,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 11:06:59,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:06:59,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 11:06:59,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:59,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:59,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:59,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:59,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:59,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:59,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:59,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:59,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:59,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:59,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:59,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:59,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:59,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:06:59,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:59,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:59,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:59,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 11:06:59,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:59,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-13 11:06:59,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:59,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 11:06:59,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:59,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 11:06:59,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:59,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-13 11:06:59,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:59,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:59,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:59,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 11:06:59,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:59,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-13 11:06:59,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:59,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 11:06:59,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:06:59,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 11:06:59,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:59,996 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 11:06:59,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824956744] [2020-10-13 11:06:59,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:59,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 11:06:59,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722872282] [2020-10-13 11:06:59,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 11:06:59,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:59,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 11:06:59,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-13 11:06:59,998 INFO L87 Difference]: Start difference. First operand 551 states and 627 transitions. Second operand 23 states. [2020-10-13 11:07:00,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:00,999 INFO L93 Difference]: Finished difference Result 641 states and 734 transitions. [2020-10-13 11:07:01,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 11:07:01,002 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 51 [2020-10-13 11:07:01,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:01,006 INFO L225 Difference]: With dead ends: 641 [2020-10-13 11:07:01,006 INFO L226 Difference]: Without dead ends: 627 [2020-10-13 11:07:01,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2020-10-13 11:07:01,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2020-10-13 11:07:01,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 618. [2020-10-13 11:07:01,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 618 states. [2020-10-13 11:07:01,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 705 transitions. [2020-10-13 11:07:01,084 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 705 transitions. Word has length 51 [2020-10-13 11:07:01,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:01,084 INFO L479 AbstractCegarLoop]: Abstraction has 618 states and 705 transitions. [2020-10-13 11:07:01,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 11:07:01,085 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 705 transitions. [2020-10-13 11:07:01,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 11:07:01,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:01,089 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:07:01,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-13 11:07:01,090 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:01,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:01,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1899619432, now seen corresponding path program 58 times [2020-10-13 11:07:01,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:01,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138682582] [2020-10-13 11:07:01,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:01,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:01,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:01,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:01,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 11:07:01,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:01,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 245 [2020-10-13 11:07:01,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:01,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 11:07:01,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:07:01,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 11:07:01,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:01,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:01,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:01,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:01,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:01,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:07:01,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:01,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:07:01,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:01,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:01,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:01,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:01,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:01,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:07:01,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:01,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:01,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:01,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 11:07:01,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:01,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-13 11:07:01,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:01,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 11:07:01,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:01,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 11:07:01,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:01,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-13 11:07:01,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:01,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:01,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:01,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 11:07:01,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:01,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-13 11:07:01,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:01,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 11:07:01,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:07:01,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 11:07:01,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:01,941 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 11:07:01,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138682582] [2020-10-13 11:07:01,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:01,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 11:07:01,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588280145] [2020-10-13 11:07:01,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 11:07:01,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:01,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 11:07:01,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-13 11:07:01,942 INFO L87 Difference]: Start difference. First operand 618 states and 705 transitions. Second operand 23 states. [2020-10-13 11:07:02,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:02,960 INFO L93 Difference]: Finished difference Result 633 states and 720 transitions. [2020-10-13 11:07:02,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 11:07:02,961 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 51 [2020-10-13 11:07:02,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:02,965 INFO L225 Difference]: With dead ends: 633 [2020-10-13 11:07:02,965 INFO L226 Difference]: Without dead ends: 621 [2020-10-13 11:07:02,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2020-10-13 11:07:02,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2020-10-13 11:07:03,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 619. [2020-10-13 11:07:03,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 619 states. [2020-10-13 11:07:03,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 702 transitions. [2020-10-13 11:07:03,039 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 702 transitions. Word has length 51 [2020-10-13 11:07:03,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:03,039 INFO L479 AbstractCegarLoop]: Abstraction has 619 states and 702 transitions. [2020-10-13 11:07:03,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 11:07:03,039 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 702 transitions. [2020-10-13 11:07:03,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 11:07:03,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:03,043 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:07:03,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-13 11:07:03,043 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:03,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:03,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1937589319, now seen corresponding path program 59 times [2020-10-13 11:07:03,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:03,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274139797] [2020-10-13 11:07:03,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:03,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:03,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:03,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:03,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 11:07:03,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:03,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-13 11:07:03,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:03,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 11:07:03,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-13 11:07:03,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 11:07:03,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:03,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:03,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:03,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:03,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:03,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:07:03,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:03,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:07:03,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:03,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:03,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:03,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:03,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:03,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:07:03,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:03,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:03,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:03,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 11:07:03,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:03,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 11:07:03,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:03,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:03,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:03,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:03,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:03,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-13 11:07:03,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:03,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:03,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:03,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 11:07:03,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:03,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-13 11:07:03,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:03,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 11:07:03,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:07:03,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 11:07:03,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:03,335 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-13 11:07:03,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274139797] [2020-10-13 11:07:03,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:03,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 11:07:03,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616090746] [2020-10-13 11:07:03,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 11:07:03,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:03,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 11:07:03,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-13 11:07:03,337 INFO L87 Difference]: Start difference. First operand 619 states and 702 transitions. Second operand 13 states. [2020-10-13 11:07:03,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:03,664 INFO L93 Difference]: Finished difference Result 653 states and 742 transitions. [2020-10-13 11:07:03,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 11:07:03,664 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-10-13 11:07:03,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:03,667 INFO L225 Difference]: With dead ends: 653 [2020-10-13 11:07:03,667 INFO L226 Difference]: Without dead ends: 620 [2020-10-13 11:07:03,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=483, Unknown=0, NotChecked=0, Total=756 [2020-10-13 11:07:03,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2020-10-13 11:07:03,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 608. [2020-10-13 11:07:03,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 608 states. [2020-10-13 11:07:03,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 685 transitions. [2020-10-13 11:07:03,737 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 685 transitions. Word has length 51 [2020-10-13 11:07:03,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:03,737 INFO L479 AbstractCegarLoop]: Abstraction has 608 states and 685 transitions. [2020-10-13 11:07:03,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 11:07:03,737 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 685 transitions. [2020-10-13 11:07:03,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 11:07:03,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:03,740 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:07:03,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-13 11:07:03,740 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:03,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:03,740 INFO L82 PathProgramCache]: Analyzing trace with hash -544488514, now seen corresponding path program 60 times [2020-10-13 11:07:03,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:03,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917744404] [2020-10-13 11:07:03,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:03,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:03,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:03,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:03,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 11:07:03,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:03,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-13 11:07:03,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:03,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 11:07:03,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:07:03,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 11:07:03,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:03,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:03,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:03,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:03,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:03,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:07:03,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:03,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:07:03,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:03,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:03,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:03,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:03,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:03,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:07:03,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:03,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:03,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:03,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 11:07:03,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:03,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-13 11:07:03,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:03,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 11:07:03,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:07:03,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 11:07:03,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:04,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-13 11:07:04,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:04,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:04,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:04,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 11:07:04,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:04,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 11:07:04,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:04,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:04,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 11:07:04,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:04,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:04,036 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-13 11:07:04,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917744404] [2020-10-13 11:07:04,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:04,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 11:07:04,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128948942] [2020-10-13 11:07:04,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 11:07:04,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:04,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 11:07:04,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-13 11:07:04,038 INFO L87 Difference]: Start difference. First operand 608 states and 685 transitions. Second operand 13 states. [2020-10-13 11:07:04,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:04,341 INFO L93 Difference]: Finished difference Result 945 states and 1053 transitions. [2020-10-13 11:07:04,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 11:07:04,342 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-10-13 11:07:04,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:04,346 INFO L225 Difference]: With dead ends: 945 [2020-10-13 11:07:04,346 INFO L226 Difference]: Without dead ends: 617 [2020-10-13 11:07:04,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=483, Unknown=0, NotChecked=0, Total=756 [2020-10-13 11:07:04,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2020-10-13 11:07:04,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 617. [2020-10-13 11:07:04,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2020-10-13 11:07:04,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 694 transitions. [2020-10-13 11:07:04,421 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 694 transitions. Word has length 51 [2020-10-13 11:07:04,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:04,421 INFO L479 AbstractCegarLoop]: Abstraction has 617 states and 694 transitions. [2020-10-13 11:07:04,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 11:07:04,421 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 694 transitions. [2020-10-13 11:07:04,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 11:07:04,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:04,424 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:07:04,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-13 11:07:04,424 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:04,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:04,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1206067897, now seen corresponding path program 61 times [2020-10-13 11:07:04,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:04,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414991014] [2020-10-13 11:07:04,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:04,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:04,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:04,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:04,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 11:07:04,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:04,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 350 [2020-10-13 11:07:04,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:04,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 11:07:04,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:07:04,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 11:07:04,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:04,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:04,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:04,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:04,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:07:04,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:04,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:07:04,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:04,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:04,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:04,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:04,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:04,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:07:04,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:04,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:04,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:04,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 11:07:04,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:04,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-13 11:07:04,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:04,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 11:07:04,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:04,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 11:07:04,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:05,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-13 11:07:05,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:05,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:05,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:05,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 11:07:05,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:05,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-13 11:07:05,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:05,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 11:07:05,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:05,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 11:07:05,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:05,748 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:07:05,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414991014] [2020-10-13 11:07:05,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:05,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 11:07:05,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609683949] [2020-10-13 11:07:05,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 11:07:05,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:05,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 11:07:05,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 11:07:05,749 INFO L87 Difference]: Start difference. First operand 617 states and 694 transitions. Second operand 34 states. [2020-10-13 11:07:07,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:07,132 INFO L93 Difference]: Finished difference Result 717 states and 807 transitions. [2020-10-13 11:07:07,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 11:07:07,132 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 52 [2020-10-13 11:07:07,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:07,137 INFO L225 Difference]: With dead ends: 717 [2020-10-13 11:07:07,137 INFO L226 Difference]: Without dead ends: 711 [2020-10-13 11:07:07,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=109, Invalid=1783, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 11:07:07,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2020-10-13 11:07:07,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 633. [2020-10-13 11:07:07,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 633 states. [2020-10-13 11:07:07,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 713 transitions. [2020-10-13 11:07:07,212 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 713 transitions. Word has length 52 [2020-10-13 11:07:07,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:07,212 INFO L479 AbstractCegarLoop]: Abstraction has 633 states and 713 transitions. [2020-10-13 11:07:07,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 11:07:07,212 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 713 transitions. [2020-10-13 11:07:07,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 11:07:07,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:07,215 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:07,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-13 11:07:07,215 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:07,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:07,215 INFO L82 PathProgramCache]: Analyzing trace with hash -348617223, now seen corresponding path program 62 times [2020-10-13 11:07:07,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:07,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1310242538] [2020-10-13 11:07:07,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:07,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:07,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:07,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:07,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 11:07:07,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:07,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 333 [2020-10-13 11:07:07,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:07,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 11:07:07,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:07:07,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 11:07:07,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:07,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:07,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:07,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:07,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:07,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:07:07,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:07,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:07:07,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:07,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:07,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:07,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:07,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:07,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:07:07,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:07,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:07,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:07,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 11:07:07,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:07,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-13 11:07:07,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:07,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 11:07:07,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:07,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 11:07:07,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:07:07,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-13 11:07:08,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:08,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:08,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:08,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 11:07:08,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:08,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-13 11:07:08,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:08,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 11:07:08,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:08,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 11:07:08,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:08,492 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 11:07:08,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1310242538] [2020-10-13 11:07:08,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:08,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 11:07:08,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057796945] [2020-10-13 11:07:08,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 11:07:08,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:08,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 11:07:08,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2020-10-13 11:07:08,494 INFO L87 Difference]: Start difference. First operand 633 states and 713 transitions. Second operand 32 states. [2020-10-13 11:07:09,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:09,738 INFO L93 Difference]: Finished difference Result 639 states and 718 transitions. [2020-10-13 11:07:09,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 11:07:09,739 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 52 [2020-10-13 11:07:09,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:09,743 INFO L225 Difference]: With dead ends: 639 [2020-10-13 11:07:09,743 INFO L226 Difference]: Without dead ends: 617 [2020-10-13 11:07:09,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=113, Invalid=1779, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 11:07:09,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2020-10-13 11:07:09,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 617. [2020-10-13 11:07:09,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2020-10-13 11:07:09,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 695 transitions. [2020-10-13 11:07:09,814 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 695 transitions. Word has length 52 [2020-10-13 11:07:09,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:09,814 INFO L479 AbstractCegarLoop]: Abstraction has 617 states and 695 transitions. [2020-10-13 11:07:09,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 11:07:09,815 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 695 transitions. [2020-10-13 11:07:09,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 11:07:09,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:09,817 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:09,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-13 11:07:09,817 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:09,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:09,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1376969401, now seen corresponding path program 63 times [2020-10-13 11:07:09,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:09,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283476253] [2020-10-13 11:07:09,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:09,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:10,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:10,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 11:07:10,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:10,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 413 [2020-10-13 11:07:10,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:10,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 11:07:10,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:07:10,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 11:07:10,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:10,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:10,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:10,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:10,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:10,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:07:10,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:10,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:07:10,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:10,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:10,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:10,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:10,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:10,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:07:10,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:10,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:10,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:10,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 11:07:10,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:10,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-13 11:07:10,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:10,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 11:07:10,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:10,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 11:07:10,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:10,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-13 11:07:10,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:10,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:10,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:10,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 11:07:10,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:10,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-13 11:07:10,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:10,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 11:07:10,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:10,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 11:07:10,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:11,046 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 11:07:11,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283476253] [2020-10-13 11:07:11,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:11,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 11:07:11,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686903893] [2020-10-13 11:07:11,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 11:07:11,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:11,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 11:07:11,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-10-13 11:07:11,047 INFO L87 Difference]: Start difference. First operand 617 states and 695 transitions. Second operand 30 states. [2020-10-13 11:07:12,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:12,169 INFO L93 Difference]: Finished difference Result 623 states and 700 transitions. [2020-10-13 11:07:12,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 11:07:12,169 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 52 [2020-10-13 11:07:12,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:12,172 INFO L225 Difference]: With dead ends: 623 [2020-10-13 11:07:12,172 INFO L226 Difference]: Without dead ends: 599 [2020-10-13 11:07:12,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=117, Invalid=1775, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 11:07:12,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2020-10-13 11:07:12,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 599. [2020-10-13 11:07:12,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 599 states. [2020-10-13 11:07:12,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 675 transitions. [2020-10-13 11:07:12,251 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 675 transitions. Word has length 52 [2020-10-13 11:07:12,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:12,252 INFO L479 AbstractCegarLoop]: Abstraction has 599 states and 675 transitions. [2020-10-13 11:07:12,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 11:07:12,252 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 675 transitions. [2020-10-13 11:07:12,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 11:07:12,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:12,254 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:12,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-13 11:07:12,254 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:12,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:12,254 INFO L82 PathProgramCache]: Analyzing trace with hash -46807559, now seen corresponding path program 64 times [2020-10-13 11:07:12,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:12,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141604624] [2020-10-13 11:07:12,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:12,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:12,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:12,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:12,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 11:07:12,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:12,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 415 [2020-10-13 11:07:12,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:12,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 11:07:12,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:07:12,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 11:07:12,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:12,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:12,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:12,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:12,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:12,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:07:12,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:12,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:07:12,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:12,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:12,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:12,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:12,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:12,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:07:12,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:12,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:12,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:12,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 11:07:12,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:12,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-13 11:07:12,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:12,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 11:07:12,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:12,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 11:07:12,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:12,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-13 11:07:13,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:13,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:13,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:13,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 11:07:13,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:13,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-13 11:07:13,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:13,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 11:07:13,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:13,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 11:07:13,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:13,416 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-13 11:07:13,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141604624] [2020-10-13 11:07:13,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:13,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 11:07:13,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905909533] [2020-10-13 11:07:13,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 11:07:13,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:13,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 11:07:13,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-10-13 11:07:13,418 INFO L87 Difference]: Start difference. First operand 599 states and 675 transitions. Second operand 28 states. [2020-10-13 11:07:14,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:14,416 INFO L93 Difference]: Finished difference Result 605 states and 680 transitions. [2020-10-13 11:07:14,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 11:07:14,417 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 52 [2020-10-13 11:07:14,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:14,419 INFO L225 Difference]: With dead ends: 605 [2020-10-13 11:07:14,419 INFO L226 Difference]: Without dead ends: 579 [2020-10-13 11:07:14,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=121, Invalid=1771, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 11:07:14,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2020-10-13 11:07:14,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 579. [2020-10-13 11:07:14,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 579 states. [2020-10-13 11:07:14,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 653 transitions. [2020-10-13 11:07:14,484 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 653 transitions. Word has length 52 [2020-10-13 11:07:14,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:14,485 INFO L479 AbstractCegarLoop]: Abstraction has 579 states and 653 transitions. [2020-10-13 11:07:14,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 11:07:14,485 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 653 transitions. [2020-10-13 11:07:14,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 11:07:14,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:14,487 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:07:14,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-13 11:07:14,487 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:14,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:14,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1897356615, now seen corresponding path program 65 times [2020-10-13 11:07:14,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:14,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181514791] [2020-10-13 11:07:14,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:14,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:14,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:14,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:14,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 11:07:14,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:14,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 294 [2020-10-13 11:07:14,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:14,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 11:07:14,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:07:14,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 11:07:14,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:14,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:14,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:14,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:14,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:14,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:07:14,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:14,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:07:14,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:14,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:14,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:14,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:14,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:14,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:07:14,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:14,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:14,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:14,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 11:07:14,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:14,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-13 11:07:14,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:14,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 11:07:14,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:14,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 11:07:14,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:15,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-13 11:07:15,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:15,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:15,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:15,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 11:07:15,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:15,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-13 11:07:15,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:15,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 11:07:15,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:15,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 11:07:15,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:07:15,755 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-13 11:07:15,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181514791] [2020-10-13 11:07:15,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:15,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 11:07:15,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981693234] [2020-10-13 11:07:15,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 11:07:15,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:15,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 11:07:15,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-10-13 11:07:15,758 INFO L87 Difference]: Start difference. First operand 579 states and 653 transitions. Second operand 26 states. [2020-10-13 11:07:16,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:16,927 INFO L93 Difference]: Finished difference Result 597 states and 674 transitions. [2020-10-13 11:07:16,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 11:07:16,928 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 52 [2020-10-13 11:07:16,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:16,932 INFO L225 Difference]: With dead ends: 597 [2020-10-13 11:07:16,933 INFO L226 Difference]: Without dead ends: 591 [2020-10-13 11:07:16,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 11:07:16,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2020-10-13 11:07:16,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 589. [2020-10-13 11:07:16,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 589 states. [2020-10-13 11:07:16,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 666 transitions. [2020-10-13 11:07:16,995 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 666 transitions. Word has length 52 [2020-10-13 11:07:16,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:16,995 INFO L479 AbstractCegarLoop]: Abstraction has 589 states and 666 transitions. [2020-10-13 11:07:16,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 11:07:16,995 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 666 transitions. [2020-10-13 11:07:16,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 11:07:16,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:16,998 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:07:16,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-13 11:07:16,999 INFO L427 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:16,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:16,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1301872712, now seen corresponding path program 66 times [2020-10-13 11:07:16,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:16,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935440930] [2020-10-13 11:07:16,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:17,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:17,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:17,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:17,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 11:07:17,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:17,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 322 [2020-10-13 11:07:17,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:17,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 11:07:17,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:07:17,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 11:07:17,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:17,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:17,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:17,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:17,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:17,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:07:17,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:17,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:07:17,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:17,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:17,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:17,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:17,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:17,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:07:17,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:17,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:17,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:17,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 11:07:17,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:17,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-13 11:07:17,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:17,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 11:07:17,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:17,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 11:07:17,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:17,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-13 11:07:17,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:17,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:17,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:17,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 11:07:17,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:17,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-13 11:07:17,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:17,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 11:07:17,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:07:17,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 11:07:17,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:17,998 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 11:07:18,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935440930] [2020-10-13 11:07:18,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:18,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 11:07:18,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240660616] [2020-10-13 11:07:18,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 11:07:18,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:18,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 11:07:18,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-10-13 11:07:18,008 INFO L87 Difference]: Start difference. First operand 589 states and 666 transitions. Second operand 25 states. [2020-10-13 11:07:19,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:19,241 INFO L93 Difference]: Finished difference Result 681 states and 775 transitions. [2020-10-13 11:07:19,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 11:07:19,242 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 53 [2020-10-13 11:07:19,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:19,248 INFO L225 Difference]: With dead ends: 681 [2020-10-13 11:07:19,248 INFO L226 Difference]: Without dead ends: 667 [2020-10-13 11:07:19,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=647, Unknown=0, NotChecked=0, Total=702 [2020-10-13 11:07:19,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2020-10-13 11:07:19,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 658. [2020-10-13 11:07:19,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 658 states. [2020-10-13 11:07:19,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 746 transitions. [2020-10-13 11:07:19,326 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 746 transitions. Word has length 53 [2020-10-13 11:07:19,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:19,326 INFO L479 AbstractCegarLoop]: Abstraction has 658 states and 746 transitions. [2020-10-13 11:07:19,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 11:07:19,326 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 746 transitions. [2020-10-13 11:07:19,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 11:07:19,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:19,329 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:07:19,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-13 11:07:19,329 INFO L427 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:19,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:19,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1380486271, now seen corresponding path program 67 times [2020-10-13 11:07:19,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:19,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638776453] [2020-10-13 11:07:19,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:19,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:19,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:19,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:19,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 11:07:19,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:19,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 295 [2020-10-13 11:07:19,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:19,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 11:07:19,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:07:19,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 11:07:19,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:19,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:19,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:19,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:19,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:07:19,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:19,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:07:19,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:19,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:19,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:19,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:19,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:19,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:07:19,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:19,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:19,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:19,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 11:07:19,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:19,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-13 11:07:19,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:19,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 11:07:19,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:19,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 11:07:19,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:19,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 11:07:19,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:19,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:20,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:20,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 11:07:20,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:20,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-13 11:07:20,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:20,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 11:07:20,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:07:20,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 11:07:20,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:20,343 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 11:07:20,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638776453] [2020-10-13 11:07:20,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:20,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 11:07:20,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902566267] [2020-10-13 11:07:20,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 11:07:20,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:20,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 11:07:20,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-10-13 11:07:20,345 INFO L87 Difference]: Start difference. First operand 658 states and 746 transitions. Second operand 25 states. [2020-10-13 11:07:21,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:21,578 INFO L93 Difference]: Finished difference Result 673 states and 761 transitions. [2020-10-13 11:07:21,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 11:07:21,579 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 53 [2020-10-13 11:07:21,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:21,582 INFO L225 Difference]: With dead ends: 673 [2020-10-13 11:07:21,582 INFO L226 Difference]: Without dead ends: 661 [2020-10-13 11:07:21,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2020-10-13 11:07:21,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2020-10-13 11:07:21,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 659. [2020-10-13 11:07:21,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 659 states. [2020-10-13 11:07:21,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 743 transitions. [2020-10-13 11:07:21,663 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 743 transitions. Word has length 53 [2020-10-13 11:07:21,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:21,663 INFO L479 AbstractCegarLoop]: Abstraction has 659 states and 743 transitions. [2020-10-13 11:07:21,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 11:07:21,663 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 743 transitions. [2020-10-13 11:07:21,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 11:07:21,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:21,666 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:07:21,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-13 11:07:21,667 INFO L427 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:21,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:21,667 INFO L82 PathProgramCache]: Analyzing trace with hash -886594786, now seen corresponding path program 68 times [2020-10-13 11:07:21,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:21,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [966368812] [2020-10-13 11:07:21,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:21,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:21,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:21,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:21,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 11:07:21,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:21,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-13 11:07:21,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:21,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 11:07:21,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:07:21,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 11:07:21,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:21,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:21,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:21,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:21,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:21,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:07:21,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:21,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:07:21,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:21,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:21,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:21,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:21,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:21,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:07:21,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:21,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:21,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:21,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 11:07:21,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:21,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-13 11:07:21,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:21,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 11:07:21,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:07:21,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 11:07:21,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:21,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 11:07:21,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:21,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:21,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:21,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 11:07:21,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:21,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 11:07:21,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:21,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:21,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 11:07:21,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:21,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:21,979 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-13 11:07:21,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [966368812] [2020-10-13 11:07:21,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:21,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 11:07:21,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726790105] [2020-10-13 11:07:21,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 11:07:21,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:21,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 11:07:21,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-10-13 11:07:21,980 INFO L87 Difference]: Start difference. First operand 659 states and 743 transitions. Second operand 14 states. [2020-10-13 11:07:22,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:22,391 INFO L93 Difference]: Finished difference Result 1133 states and 1273 transitions. [2020-10-13 11:07:22,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 11:07:22,392 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-10-13 11:07:22,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:22,398 INFO L225 Difference]: With dead ends: 1133 [2020-10-13 11:07:22,399 INFO L226 Difference]: Without dead ends: 771 [2020-10-13 11:07:22,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=385, Invalid=737, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 11:07:22,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2020-10-13 11:07:22,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 741. [2020-10-13 11:07:22,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 741 states. [2020-10-13 11:07:22,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 836 transitions. [2020-10-13 11:07:22,560 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 836 transitions. Word has length 53 [2020-10-13 11:07:22,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:22,561 INFO L479 AbstractCegarLoop]: Abstraction has 741 states and 836 transitions. [2020-10-13 11:07:22,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 11:07:22,561 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 836 transitions. [2020-10-13 11:07:22,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 11:07:22,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:22,565 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:07:22,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-13 11:07:22,565 INFO L427 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:22,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:22,566 INFO L82 PathProgramCache]: Analyzing trace with hash -650142791, now seen corresponding path program 69 times [2020-10-13 11:07:22,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:22,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825382099] [2020-10-13 11:07:22,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:22,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:22,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:22,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:22,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 11:07:22,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:22,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-13 11:07:22,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:22,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 11:07:22,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-13 11:07:22,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 11:07:22,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:22,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:22,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:22,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:22,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:22,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:07:22,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:22,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:07:22,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:22,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:22,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:22,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:22,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:22,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:07:22,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:22,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:22,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:22,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 11:07:22,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:22,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 11:07:22,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:22,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:22,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:22,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:22,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:22,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-13 11:07:22,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:22,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:22,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:22,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 11:07:22,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:22,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-13 11:07:22,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:22,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 11:07:22,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:07:22,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 11:07:22,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:22,930 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-13 11:07:22,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825382099] [2020-10-13 11:07:22,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:22,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 11:07:22,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100263244] [2020-10-13 11:07:22,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 11:07:22,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:22,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 11:07:22,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-10-13 11:07:22,931 INFO L87 Difference]: Start difference. First operand 741 states and 836 transitions. Second operand 14 states. [2020-10-13 11:07:23,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:23,415 INFO L93 Difference]: Finished difference Result 899 states and 1025 transitions. [2020-10-13 11:07:23,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 11:07:23,416 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-10-13 11:07:23,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:23,423 INFO L225 Difference]: With dead ends: 899 [2020-10-13 11:07:23,423 INFO L226 Difference]: Without dead ends: 853 [2020-10-13 11:07:23,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=385, Invalid=737, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 11:07:23,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2020-10-13 11:07:23,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 823. [2020-10-13 11:07:23,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 823 states. [2020-10-13 11:07:23,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 929 transitions. [2020-10-13 11:07:23,564 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 929 transitions. Word has length 53 [2020-10-13 11:07:23,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:23,564 INFO L479 AbstractCegarLoop]: Abstraction has 823 states and 929 transitions. [2020-10-13 11:07:23,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 11:07:23,564 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 929 transitions. [2020-10-13 11:07:23,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 11:07:23,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:23,568 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:07:23,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-10-13 11:07:23,568 INFO L427 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:23,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:23,568 INFO L82 PathProgramCache]: Analyzing trace with hash -189870414, now seen corresponding path program 70 times [2020-10-13 11:07:23,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:23,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554377938] [2020-10-13 11:07:23,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:23,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:23,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:23,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:23,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 11:07:23,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:23,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 406 [2020-10-13 11:07:23,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:23,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 11:07:23,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:07:23,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 11:07:23,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:24,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:24,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:24,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:24,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:24,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:07:24,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:24,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:07:24,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:24,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:24,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:24,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:24,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:24,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:07:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:24,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:24,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:24,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 11:07:24,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:24,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-13 11:07:24,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:24,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 11:07:24,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:24,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 11:07:24,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:24,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 11:07:24,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:24,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:24,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:24,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 11:07:24,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:24,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-13 11:07:24,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:24,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 11:07:24,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:24,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 11:07:24,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:25,146 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:07:25,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554377938] [2020-10-13 11:07:25,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:25,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 11:07:25,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733122087] [2020-10-13 11:07:25,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 11:07:25,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:25,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 11:07:25,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 11:07:25,147 INFO L87 Difference]: Start difference. First operand 823 states and 929 transitions. Second operand 36 states. [2020-10-13 11:07:26,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:26,773 INFO L93 Difference]: Finished difference Result 939 states and 1060 transitions. [2020-10-13 11:07:26,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 11:07:26,774 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 54 [2020-10-13 11:07:26,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:26,780 INFO L225 Difference]: With dead ends: 939 [2020-10-13 11:07:26,780 INFO L226 Difference]: Without dead ends: 933 [2020-10-13 11:07:26,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=113, Invalid=1957, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 11:07:26,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2020-10-13 11:07:26,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 839. [2020-10-13 11:07:26,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 839 states. [2020-10-13 11:07:26,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 948 transitions. [2020-10-13 11:07:26,927 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 948 transitions. Word has length 54 [2020-10-13 11:07:26,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:26,928 INFO L479 AbstractCegarLoop]: Abstraction has 839 states and 948 transitions. [2020-10-13 11:07:26,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 11:07:26,928 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 948 transitions. [2020-10-13 11:07:26,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 11:07:26,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:26,932 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:26,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-10-13 11:07:26,932 INFO L427 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:26,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:26,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1638366318, now seen corresponding path program 71 times [2020-10-13 11:07:26,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:26,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931694374] [2020-10-13 11:07:26,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:26,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:26,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:27,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:27,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 11:07:27,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:27,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 433 [2020-10-13 11:07:27,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:27,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 11:07:27,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:07:27,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 11:07:27,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:27,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:27,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:27,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:27,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:27,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:07:27,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:27,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:07:27,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:27,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:27,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:27,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:27,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:27,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:07:27,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:27,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:27,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:27,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 11:07:27,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:27,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-13 11:07:27,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:27,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 11:07:27,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:27,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 11:07:27,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:07:27,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 11:07:27,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:27,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:28,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:28,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 11:07:28,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:28,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-13 11:07:28,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:28,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 11:07:28,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:28,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 11:07:28,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:07:28,752 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 11:07:28,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931694374] [2020-10-13 11:07:28,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:28,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 11:07:28,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529753912] [2020-10-13 11:07:28,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 11:07:28,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:28,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 11:07:28,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 11:07:28,754 INFO L87 Difference]: Start difference. First operand 839 states and 948 transitions. Second operand 34 states. [2020-10-13 11:07:30,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:30,250 INFO L93 Difference]: Finished difference Result 845 states and 953 transitions. [2020-10-13 11:07:30,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 11:07:30,250 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 54 [2020-10-13 11:07:30,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:30,255 INFO L225 Difference]: With dead ends: 845 [2020-10-13 11:07:30,255 INFO L226 Difference]: Without dead ends: 823 [2020-10-13 11:07:30,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=117, Invalid=1953, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 11:07:30,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2020-10-13 11:07:30,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 823. [2020-10-13 11:07:30,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 823 states. [2020-10-13 11:07:30,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 930 transitions. [2020-10-13 11:07:30,359 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 930 transitions. Word has length 54 [2020-10-13 11:07:30,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:30,359 INFO L479 AbstractCegarLoop]: Abstraction has 823 states and 930 transitions. [2020-10-13 11:07:30,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 11:07:30,359 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 930 transitions. [2020-10-13 11:07:30,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 11:07:30,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:30,363 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:30,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-10-13 11:07:30,363 INFO L427 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:30,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:30,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1469117646, now seen corresponding path program 72 times [2020-10-13 11:07:30,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:30,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409241927] [2020-10-13 11:07:30,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:30,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:30,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:30,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:30,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 11:07:30,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:30,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 408 [2020-10-13 11:07:30,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:30,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 11:07:30,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:07:30,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 11:07:30,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:30,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:30,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:30,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:30,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:30,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:07:30,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:30,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:07:30,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:30,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:30,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:30,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:30,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:30,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:07:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:30,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:30,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:30,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 11:07:30,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:30,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-13 11:07:30,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:30,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 11:07:30,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:30,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 11:07:30,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:31,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 11:07:31,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:31,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:31,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:31,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 11:07:31,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:31,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-13 11:07:31,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:31,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 11:07:31,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:31,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 11:07:31,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:31,756 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 11:07:31,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409241927] [2020-10-13 11:07:31,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:31,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 11:07:31,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811269768] [2020-10-13 11:07:31,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 11:07:31,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:31,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 11:07:31,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2020-10-13 11:07:31,758 INFO L87 Difference]: Start difference. First operand 823 states and 930 transitions. Second operand 32 states. [2020-10-13 11:07:33,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:33,116 INFO L93 Difference]: Finished difference Result 829 states and 935 transitions. [2020-10-13 11:07:33,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 11:07:33,117 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 54 [2020-10-13 11:07:33,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:33,120 INFO L225 Difference]: With dead ends: 829 [2020-10-13 11:07:33,121 INFO L226 Difference]: Without dead ends: 805 [2020-10-13 11:07:33,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=121, Invalid=1949, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 11:07:33,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2020-10-13 11:07:33,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 805. [2020-10-13 11:07:33,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 805 states. [2020-10-13 11:07:33,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 910 transitions. [2020-10-13 11:07:33,285 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 910 transitions. Word has length 54 [2020-10-13 11:07:33,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:33,286 INFO L479 AbstractCegarLoop]: Abstraction has 805 states and 910 transitions. [2020-10-13 11:07:33,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 11:07:33,286 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 910 transitions. [2020-10-13 11:07:33,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 11:07:33,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:33,289 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 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 11:07:33,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-10-13 11:07:33,290 INFO L427 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:33,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:33,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1834367214, now seen corresponding path program 73 times [2020-10-13 11:07:33,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:33,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791488064] [2020-10-13 11:07:33,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:33,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:33,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:33,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:33,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 11:07:33,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:33,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 365 [2020-10-13 11:07:33,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:33,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 11:07:33,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:07:33,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 11:07:33,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:33,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:33,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:33,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:33,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:33,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:07:33,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:33,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:07:33,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:33,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:33,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:33,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:33,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:33,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:07:33,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:33,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:33,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:33,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 11:07:33,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:33,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-13 11:07:33,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:33,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 11:07:33,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:33,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 11:07:33,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:34,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 11:07:34,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:34,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:34,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:34,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 11:07:34,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:34,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-13 11:07:34,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:34,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 11:07:34,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:34,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 11:07:34,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:34,566 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-13 11:07:34,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791488064] [2020-10-13 11:07:34,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:34,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 11:07:34,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256686402] [2020-10-13 11:07:34,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 11:07:34,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:34,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 11:07:34,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-10-13 11:07:34,568 INFO L87 Difference]: Start difference. First operand 805 states and 910 transitions. Second operand 30 states. [2020-10-13 11:07:35,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:35,827 INFO L93 Difference]: Finished difference Result 811 states and 915 transitions. [2020-10-13 11:07:35,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 11:07:35,828 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 54 [2020-10-13 11:07:35,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:35,832 INFO L225 Difference]: With dead ends: 811 [2020-10-13 11:07:35,832 INFO L226 Difference]: Without dead ends: 785 [2020-10-13 11:07:35,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=125, Invalid=1945, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 11:07:35,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2020-10-13 11:07:35,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 785. [2020-10-13 11:07:35,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 785 states. [2020-10-13 11:07:35,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 888 transitions. [2020-10-13 11:07:35,964 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 888 transitions. Word has length 54 [2020-10-13 11:07:35,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:35,964 INFO L479 AbstractCegarLoop]: Abstraction has 785 states and 888 transitions. [2020-10-13 11:07:35,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 11:07:35,964 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 888 transitions. [2020-10-13 11:07:35,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 11:07:35,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:35,967 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:07:35,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2020-10-13 11:07:35,967 INFO L427 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:35,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:35,968 INFO L82 PathProgramCache]: Analyzing trace with hash -294896629, now seen corresponding path program 74 times [2020-10-13 11:07:35,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:35,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304924938] [2020-10-13 11:07:35,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:35,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:35,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:36,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:36,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 11:07:36,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:36,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-13 11:07:36,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:36,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 11:07:36,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:07:36,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 11:07:36,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:36,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:36,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:36,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:36,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:36,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:07:36,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:36,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:07:36,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:36,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:36,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:36,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:36,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:36,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:07:36,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:36,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:36,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:36,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 11:07:36,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:36,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-13 11:07:36,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:36,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 11:07:36,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:36,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 11:07:36,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:36,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-13 11:07:36,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:36,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:36,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:36,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 11:07:36,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:36,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-13 11:07:36,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:36,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 11:07:36,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:07:36,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 11:07:36,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:36,490 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-13 11:07:36,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304924938] [2020-10-13 11:07:36,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:36,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 11:07:36,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486912567] [2020-10-13 11:07:36,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 11:07:36,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:36,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 11:07:36,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-13 11:07:36,492 INFO L87 Difference]: Start difference. First operand 785 states and 888 transitions. Second operand 17 states. [2020-10-13 11:07:37,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:37,186 INFO L93 Difference]: Finished difference Result 873 states and 994 transitions. [2020-10-13 11:07:37,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 11:07:37,187 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 54 [2020-10-13 11:07:37,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:37,196 INFO L225 Difference]: With dead ends: 873 [2020-10-13 11:07:37,197 INFO L226 Difference]: Without dead ends: 855 [2020-10-13 11:07:37,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2020-10-13 11:07:37,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2020-10-13 11:07:37,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 850. [2020-10-13 11:07:37,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 850 states. [2020-10-13 11:07:37,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 961 transitions. [2020-10-13 11:07:37,310 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 961 transitions. Word has length 54 [2020-10-13 11:07:37,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:37,310 INFO L479 AbstractCegarLoop]: Abstraction has 850 states and 961 transitions. [2020-10-13 11:07:37,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 11:07:37,311 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 961 transitions. [2020-10-13 11:07:37,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 11:07:37,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:37,315 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:37,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2020-10-13 11:07:37,315 INFO L427 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:37,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:37,315 INFO L82 PathProgramCache]: Analyzing trace with hash -314685518, now seen corresponding path program 75 times [2020-10-13 11:07:37,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:37,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758476352] [2020-10-13 11:07:37,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:37,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:37,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:37,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:37,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 11:07:37,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:37,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 381 [2020-10-13 11:07:37,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:37,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 11:07:37,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:07:37,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 11:07:37,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:37,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:37,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:37,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:37,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:37,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:07:37,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:37,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:07:37,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:37,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:37,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:37,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:37,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:37,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:07:37,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:37,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:37,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:37,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 11:07:37,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:37,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-13 11:07:37,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:37,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 11:07:37,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:37,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 11:07:37,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:38,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 11:07:38,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:38,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:38,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:38,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 11:07:38,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:38,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-13 11:07:38,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:38,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 11:07:38,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:38,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 11:07:38,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:38,530 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-13 11:07:38,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758476352] [2020-10-13 11:07:38,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:38,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 11:07:38,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824839869] [2020-10-13 11:07:38,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 11:07:38,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:38,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 11:07:38,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-10-13 11:07:38,532 INFO L87 Difference]: Start difference. First operand 850 states and 961 transitions. Second operand 28 states. [2020-10-13 11:07:39,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:39,697 INFO L93 Difference]: Finished difference Result 868 states and 983 transitions. [2020-10-13 11:07:39,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 11:07:39,697 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2020-10-13 11:07:39,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:39,704 INFO L225 Difference]: With dead ends: 868 [2020-10-13 11:07:39,704 INFO L226 Difference]: Without dead ends: 850 [2020-10-13 11:07:39,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=129, Invalid=1941, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 11:07:39,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2020-10-13 11:07:39,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 845. [2020-10-13 11:07:39,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 845 states. [2020-10-13 11:07:39,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 957 transitions. [2020-10-13 11:07:39,815 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 957 transitions. Word has length 54 [2020-10-13 11:07:39,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:39,815 INFO L479 AbstractCegarLoop]: Abstraction has 845 states and 957 transitions. [2020-10-13 11:07:39,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 11:07:39,815 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 957 transitions. [2020-10-13 11:07:39,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 11:07:39,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:39,820 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:07:39,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2020-10-13 11:07:39,820 INFO L427 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:39,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:39,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1555012935, now seen corresponding path program 76 times [2020-10-13 11:07:39,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:39,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292517819] [2020-10-13 11:07:39,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:39,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:39,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:40,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:40,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 11:07:40,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:40,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-13 11:07:40,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:40,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 11:07:40,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:07:40,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 11:07:40,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:40,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:40,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:40,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:40,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:40,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:07:40,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:40,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:07:40,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:40,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:40,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:40,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:40,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:40,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:07:40,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:40,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:40,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:40,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 11:07:40,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:40,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-13 11:07:40,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:40,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 11:07:40,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:40,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 11:07:40,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:40,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-13 11:07:40,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:40,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:40,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:40,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 11:07:40,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:40,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-13 11:07:40,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:40,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 11:07:40,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:07:40,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 11:07:40,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:40,368 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-13 11:07:40,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292517819] [2020-10-13 11:07:40,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:40,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 11:07:40,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904991319] [2020-10-13 11:07:40,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 11:07:40,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:40,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 11:07:40,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-13 11:07:40,370 INFO L87 Difference]: Start difference. First operand 845 states and 957 transitions. Second operand 17 states. [2020-10-13 11:07:41,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:41,095 INFO L93 Difference]: Finished difference Result 859 states and 970 transitions. [2020-10-13 11:07:41,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 11:07:41,096 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 54 [2020-10-13 11:07:41,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:41,109 INFO L225 Difference]: With dead ends: 859 [2020-10-13 11:07:41,109 INFO L226 Difference]: Without dead ends: 833 [2020-10-13 11:07:41,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-10-13 11:07:41,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2020-10-13 11:07:41,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 831. [2020-10-13 11:07:41,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 831 states. [2020-10-13 11:07:41,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 933 transitions. [2020-10-13 11:07:41,245 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 933 transitions. Word has length 54 [2020-10-13 11:07:41,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:41,245 INFO L479 AbstractCegarLoop]: Abstraction has 831 states and 933 transitions. [2020-10-13 11:07:41,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 11:07:41,246 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 933 transitions. [2020-10-13 11:07:41,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 11:07:41,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:41,250 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:07:41,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2020-10-13 11:07:41,250 INFO L427 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:41,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:41,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1626287393, now seen corresponding path program 77 times [2020-10-13 11:07:41,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:41,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531261218] [2020-10-13 11:07:41,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:41,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:41,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:41,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:41,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 11:07:41,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:41,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 351 [2020-10-13 11:07:41,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:41,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 11:07:41,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:07:41,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 11:07:41,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:41,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:41,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:41,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:41,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:41,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:07:41,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:41,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:07:41,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:41,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:41,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:41,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:41,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:41,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:07:41,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:41,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:41,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:41,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 11:07:41,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:41,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-13 11:07:41,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:41,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 11:07:41,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:41,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 11:07:41,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:41,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 11:07:41,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:41,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:41,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:41,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 11:07:41,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:41,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-13 11:07:41,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:41,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 11:07:41,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:07:41,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 11:07:41,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:42,355 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 11:07:42,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531261218] [2020-10-13 11:07:42,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:42,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 11:07:42,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333324801] [2020-10-13 11:07:42,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 11:07:42,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:42,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 11:07:42,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-10-13 11:07:42,357 INFO L87 Difference]: Start difference. First operand 831 states and 933 transitions. Second operand 27 states. [2020-10-13 11:07:43,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:43,931 INFO L93 Difference]: Finished difference Result 947 states and 1070 transitions. [2020-10-13 11:07:43,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 11:07:43,937 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 55 [2020-10-13 11:07:43,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:43,946 INFO L225 Difference]: With dead ends: 947 [2020-10-13 11:07:43,946 INFO L226 Difference]: Without dead ends: 933 [2020-10-13 11:07:43,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=753, Unknown=0, NotChecked=0, Total=812 [2020-10-13 11:07:43,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2020-10-13 11:07:44,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 924. [2020-10-13 11:07:44,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 924 states. [2020-10-13 11:07:44,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1040 transitions. [2020-10-13 11:07:44,079 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1040 transitions. Word has length 55 [2020-10-13 11:07:44,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:44,079 INFO L479 AbstractCegarLoop]: Abstraction has 924 states and 1040 transitions. [2020-10-13 11:07:44,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 11:07:44,079 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1040 transitions. [2020-10-13 11:07:44,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 11:07:44,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:44,084 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:07:44,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2020-10-13 11:07:44,085 INFO L427 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:44,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:44,085 INFO L82 PathProgramCache]: Analyzing trace with hash -77537544, now seen corresponding path program 78 times [2020-10-13 11:07:44,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:44,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260705302] [2020-10-13 11:07:44,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:44,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:44,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:44,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:44,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 11:07:44,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:44,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 335 [2020-10-13 11:07:44,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:44,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 11:07:44,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:07:44,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 11:07:44,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:44,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:44,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:44,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:44,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:44,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:07:44,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:44,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:07:44,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:44,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:44,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:44,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:44,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:44,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:07:44,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:44,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:44,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:44,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 11:07:44,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:44,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-13 11:07:44,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:44,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 11:07:44,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:44,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 11:07:44,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:44,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-13 11:07:44,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:44,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:44,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:44,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 11:07:44,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:44,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-13 11:07:44,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:44,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 11:07:44,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:07:44,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 11:07:44,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:45,190 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 11:07:45,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260705302] [2020-10-13 11:07:45,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:45,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 11:07:45,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372333561] [2020-10-13 11:07:45,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 11:07:45,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:45,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 11:07:45,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-10-13 11:07:45,192 INFO L87 Difference]: Start difference. First operand 924 states and 1040 transitions. Second operand 27 states. [2020-10-13 11:07:46,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:46,745 INFO L93 Difference]: Finished difference Result 939 states and 1055 transitions. [2020-10-13 11:07:46,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 11:07:46,746 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 55 [2020-10-13 11:07:46,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:46,751 INFO L225 Difference]: With dead ends: 939 [2020-10-13 11:07:46,751 INFO L226 Difference]: Without dead ends: 927 [2020-10-13 11:07:46,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2020-10-13 11:07:46,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2020-10-13 11:07:46,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 925. [2020-10-13 11:07:46,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 925 states. [2020-10-13 11:07:46,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 1036 transitions. [2020-10-13 11:07:46,954 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 1036 transitions. Word has length 55 [2020-10-13 11:07:46,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:46,954 INFO L479 AbstractCegarLoop]: Abstraction has 925 states and 1036 transitions. [2020-10-13 11:07:46,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 11:07:46,955 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 1036 transitions. [2020-10-13 11:07:46,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 11:07:46,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:46,965 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:07:46,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2020-10-13 11:07:46,967 INFO L427 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:46,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:46,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1820981415, now seen corresponding path program 79 times [2020-10-13 11:07:46,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:46,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669616321] [2020-10-13 11:07:46,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:46,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:46,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:47,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:47,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 11:07:47,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:47,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 226 [2020-10-13 11:07:47,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:47,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 11:07:47,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-13 11:07:47,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 11:07:47,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:47,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:47,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:47,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:47,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:47,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:07:47,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:47,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:07:47,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:47,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:47,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:47,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:47,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:47,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:07:47,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:47,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:47,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:47,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 11:07:47,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:47,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 11:07:47,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:47,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:47,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:47,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:47,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:47,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-13 11:07:47,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:47,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:47,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:47,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 11:07:47,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:47,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-13 11:07:47,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:47,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 11:07:47,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:07:47,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 11:07:47,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:47,406 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-10-13 11:07:47,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669616321] [2020-10-13 11:07:47,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:47,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 11:07:47,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769263218] [2020-10-13 11:07:47,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 11:07:47,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:47,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 11:07:47,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-13 11:07:47,408 INFO L87 Difference]: Start difference. First operand 925 states and 1036 transitions. Second operand 15 states. [2020-10-13 11:07:47,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:47,975 INFO L93 Difference]: Finished difference Result 967 states and 1086 transitions. [2020-10-13 11:07:47,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 11:07:47,976 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2020-10-13 11:07:47,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:47,980 INFO L225 Difference]: With dead ends: 967 [2020-10-13 11:07:47,980 INFO L226 Difference]: Without dead ends: 928 [2020-10-13 11:07:47,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=448, Invalid=812, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 11:07:47,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2020-10-13 11:07:48,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 916. [2020-10-13 11:07:48,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 916 states. [2020-10-13 11:07:48,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1021 transitions. [2020-10-13 11:07:48,104 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1021 transitions. Word has length 55 [2020-10-13 11:07:48,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:48,105 INFO L479 AbstractCegarLoop]: Abstraction has 916 states and 1021 transitions. [2020-10-13 11:07:48,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 11:07:48,105 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1021 transitions. [2020-10-13 11:07:48,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 11:07:48,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:48,110 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:07:48,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2020-10-13 11:07:48,110 INFO L427 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:48,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:48,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1914468606, now seen corresponding path program 80 times [2020-10-13 11:07:48,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:48,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589609576] [2020-10-13 11:07:48,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:48,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:48,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:48,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:48,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 11:07:48,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:48,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-13 11:07:48,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:48,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 11:07:48,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:07:48,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 11:07:48,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:48,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:48,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:48,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:48,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:48,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:07:48,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:48,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:07:48,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:48,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:48,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:48,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:48,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:48,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:07:48,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:48,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:48,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:48,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 11:07:48,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:48,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-13 11:07:48,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:48,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 11:07:48,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:07:48,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 11:07:48,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:48,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 11:07:48,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:48,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:48,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:48,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 11:07:48,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:48,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 11:07:48,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:48,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:48,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 11:07:48,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:48,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:48,521 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-10-13 11:07:48,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589609576] [2020-10-13 11:07:48,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:48,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 11:07:48,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495897868] [2020-10-13 11:07:48,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 11:07:48,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:48,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 11:07:48,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-13 11:07:48,522 INFO L87 Difference]: Start difference. First operand 916 states and 1021 transitions. Second operand 15 states. [2020-10-13 11:07:49,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:49,018 INFO L93 Difference]: Finished difference Result 1409 states and 1552 transitions. [2020-10-13 11:07:49,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 11:07:49,018 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2020-10-13 11:07:49,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:49,026 INFO L225 Difference]: With dead ends: 1409 [2020-10-13 11:07:49,026 INFO L226 Difference]: Without dead ends: 927 [2020-10-13 11:07:49,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=448, Invalid=812, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 11:07:49,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2020-10-13 11:07:49,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 927. [2020-10-13 11:07:49,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 927 states. [2020-10-13 11:07:49,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 1032 transitions. [2020-10-13 11:07:49,154 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 1032 transitions. Word has length 55 [2020-10-13 11:07:49,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:49,154 INFO L479 AbstractCegarLoop]: Abstraction has 927 states and 1032 transitions. [2020-10-13 11:07:49,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 11:07:49,154 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 1032 transitions. [2020-10-13 11:07:49,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 11:07:49,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:49,159 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:07:49,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2020-10-13 11:07:49,159 INFO L427 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:49,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:49,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1856031577, now seen corresponding path program 81 times [2020-10-13 11:07:49,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:49,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670373861] [2020-10-13 11:07:49,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:49,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:49,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:49,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:49,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 11:07:49,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:49,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 572 [2020-10-13 11:07:49,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:49,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 11:07:49,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:07:49,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 11:07:49,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:49,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:49,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:49,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:49,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:49,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:07:49,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:49,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:07:49,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:49,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:49,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:49,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:49,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:49,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:07:49,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:49,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:49,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:49,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 11:07:49,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:49,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-13 11:07:49,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:49,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 11:07:49,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:49,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 11:07:49,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:50,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-13 11:07:50,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:50,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:50,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:50,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 11:07:50,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:50,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-13 11:07:50,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:50,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 11:07:50,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:50,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 11:07:50,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:51,111 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:07:51,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670373861] [2020-10-13 11:07:51,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:51,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 11:07:51,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477019275] [2020-10-13 11:07:51,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 11:07:51,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:51,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 11:07:51,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 11:07:51,113 INFO L87 Difference]: Start difference. First operand 927 states and 1032 transitions. Second operand 38 states. [2020-10-13 11:07:52,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:52,980 INFO L93 Difference]: Finished difference Result 1051 states and 1171 transitions. [2020-10-13 11:07:52,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 11:07:52,981 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 56 [2020-10-13 11:07:52,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:52,987 INFO L225 Difference]: With dead ends: 1051 [2020-10-13 11:07:52,988 INFO L226 Difference]: Without dead ends: 1045 [2020-10-13 11:07:52,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=117, Invalid=2139, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 11:07:52,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2020-10-13 11:07:53,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 943. [2020-10-13 11:07:53,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 943 states. [2020-10-13 11:07:53,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1051 transitions. [2020-10-13 11:07:53,116 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1051 transitions. Word has length 56 [2020-10-13 11:07:53,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:53,116 INFO L479 AbstractCegarLoop]: Abstraction has 943 states and 1051 transitions. [2020-10-13 11:07:53,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 11:07:53,117 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1051 transitions. [2020-10-13 11:07:53,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 11:07:53,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:53,121 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:53,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2020-10-13 11:07:53,122 INFO L427 AbstractCegarLoop]: === Iteration 89 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:53,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:53,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1440959257, now seen corresponding path program 82 times [2020-10-13 11:07:53,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:53,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075416347] [2020-10-13 11:07:53,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:53,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:53,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:53,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:53,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 11:07:53,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:53,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 478 [2020-10-13 11:07:53,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:53,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 11:07:53,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:07:53,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 11:07:53,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:53,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:53,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:53,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:53,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:53,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:07:53,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:53,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:07:53,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:53,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:53,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:53,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:53,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:53,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:07:53,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:53,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:53,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:53,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 11:07:53,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:53,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-13 11:07:53,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:53,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 11:07:53,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:53,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 11:07:53,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:54,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-13 11:07:54,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:54,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:54,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:54,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 11:07:54,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:54,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-13 11:07:54,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:54,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 11:07:54,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:54,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 11:07:54,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:54,904 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 11:07:54,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075416347] [2020-10-13 11:07:54,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:54,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 11:07:54,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781559561] [2020-10-13 11:07:54,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 11:07:54,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:54,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 11:07:54,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 11:07:54,906 INFO L87 Difference]: Start difference. First operand 943 states and 1051 transitions. Second operand 36 states. [2020-10-13 11:07:56,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:56,597 INFO L93 Difference]: Finished difference Result 949 states and 1056 transitions. [2020-10-13 11:07:56,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 11:07:56,597 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 56 [2020-10-13 11:07:56,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:56,601 INFO L225 Difference]: With dead ends: 949 [2020-10-13 11:07:56,601 INFO L226 Difference]: Without dead ends: 927 [2020-10-13 11:07:56,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=121, Invalid=2135, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 11:07:56,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2020-10-13 11:07:56,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 927. [2020-10-13 11:07:56,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 927 states. [2020-10-13 11:07:56,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 1033 transitions. [2020-10-13 11:07:56,729 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 1033 transitions. Word has length 56 [2020-10-13 11:07:56,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:56,729 INFO L479 AbstractCegarLoop]: Abstraction has 927 states and 1033 transitions. [2020-10-13 11:07:56,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 11:07:56,729 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 1033 transitions. [2020-10-13 11:07:56,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 11:07:56,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:56,734 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:56,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2020-10-13 11:07:56,734 INFO L427 AbstractCegarLoop]: === Iteration 90 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:56,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:56,735 INFO L82 PathProgramCache]: Analyzing trace with hash -157217959, now seen corresponding path program 83 times [2020-10-13 11:07:56,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:56,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665896617] [2020-10-13 11:07:56,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:56,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:56,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:57,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:57,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 11:07:57,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:57,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 559 [2020-10-13 11:07:57,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:57,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 11:07:57,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:07:57,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 11:07:57,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:57,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:57,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:57,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:57,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:57,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:07:57,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:57,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:07:57,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:57,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:57,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:57,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:57,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:57,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:07:57,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:57,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:57,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:57,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 11:07:57,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:57,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-13 11:07:57,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:57,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 11:07:57,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:57,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 11:07:57,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:57,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-13 11:07:57,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:57,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:57,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:57,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 11:07:57,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:57,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-13 11:07:57,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:57,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 11:07:57,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:57,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 11:07:57,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:58,472 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 11:07:58,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665896617] [2020-10-13 11:07:58,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:58,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 11:07:58,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099826910] [2020-10-13 11:07:58,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 11:07:58,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:58,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 11:07:58,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 11:07:58,474 INFO L87 Difference]: Start difference. First operand 927 states and 1033 transitions. Second operand 34 states. [2020-10-13 11:08:00,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:00,037 INFO L93 Difference]: Finished difference Result 933 states and 1038 transitions. [2020-10-13 11:08:00,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 11:08:00,037 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 56 [2020-10-13 11:08:00,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:00,042 INFO L225 Difference]: With dead ends: 933 [2020-10-13 11:08:00,042 INFO L226 Difference]: Without dead ends: 909 [2020-10-13 11:08:00,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=125, Invalid=2131, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 11:08:00,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2020-10-13 11:08:00,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 909. [2020-10-13 11:08:00,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 909 states. [2020-10-13 11:08:00,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 1013 transitions. [2020-10-13 11:08:00,164 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 1013 transitions. Word has length 56 [2020-10-13 11:08:00,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:00,164 INFO L479 AbstractCegarLoop]: Abstraction has 909 states and 1013 transitions. [2020-10-13 11:08:00,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 11:08:00,164 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 1013 transitions. [2020-10-13 11:08:00,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 11:08:00,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:00,169 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 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 11:08:00,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2020-10-13 11:08:00,169 INFO L427 AbstractCegarLoop]: === Iteration 91 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:00,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:00,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1925319449, now seen corresponding path program 84 times [2020-10-13 11:08:00,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:00,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017792617] [2020-10-13 11:08:00,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:00,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:00,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:00,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:00,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 11:08:00,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:00,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 526 [2020-10-13 11:08:00,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:00,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 11:08:00,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:08:00,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 11:08:00,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:00,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:00,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:00,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:00,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:00,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:08:00,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:00,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:08:00,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:00,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:00,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:00,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:00,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:00,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:08:00,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:00,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:00,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:00,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 11:08:00,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:00,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-13 11:08:00,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:00,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 11:08:00,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:00,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 11:08:00,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:01,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-13 11:08:01,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:01,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:01,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:01,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 11:08:01,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:01,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-13 11:08:01,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:01,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 11:08:01,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:01,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 11:08:01,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:01,758 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-13 11:08:01,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017792617] [2020-10-13 11:08:01,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:01,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 11:08:01,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542763324] [2020-10-13 11:08:01,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 11:08:01,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:01,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 11:08:01,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2020-10-13 11:08:01,760 INFO L87 Difference]: Start difference. First operand 909 states and 1013 transitions. Second operand 32 states. [2020-10-13 11:08:03,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:03,221 INFO L93 Difference]: Finished difference Result 915 states and 1018 transitions. [2020-10-13 11:08:03,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 11:08:03,221 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 56 [2020-10-13 11:08:03,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:03,227 INFO L225 Difference]: With dead ends: 915 [2020-10-13 11:08:03,227 INFO L226 Difference]: Without dead ends: 889 [2020-10-13 11:08:03,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=129, Invalid=2127, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 11:08:03,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2020-10-13 11:08:03,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 889. [2020-10-13 11:08:03,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 889 states. [2020-10-13 11:08:03,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 991 transitions. [2020-10-13 11:08:03,439 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 991 transitions. Word has length 56 [2020-10-13 11:08:03,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:03,439 INFO L479 AbstractCegarLoop]: Abstraction has 889 states and 991 transitions. [2020-10-13 11:08:03,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 11:08:03,439 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 991 transitions. [2020-10-13 11:08:03,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 11:08:03,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:03,446 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1] [2020-10-13 11:08:03,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2020-10-13 11:08:03,447 INFO L427 AbstractCegarLoop]: === Iteration 92 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:03,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:03,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1508068185, now seen corresponding path program 85 times [2020-10-13 11:08:03,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:03,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334444931] [2020-10-13 11:08:03,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:03,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:03,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:03,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:03,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 11:08:03,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:03,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 459 [2020-10-13 11:08:03,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:03,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 11:08:03,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:08:03,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 11:08:03,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:03,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:03,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:03,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:03,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:03,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:08:03,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:03,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:08:03,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:03,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:03,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:03,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:03,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:03,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:08:03,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:04,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:04,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:04,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 11:08:04,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:04,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-13 11:08:04,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:04,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 11:08:04,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:04,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 11:08:04,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:04,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-13 11:08:04,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:04,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:04,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:04,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 11:08:04,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:04,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-13 11:08:04,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:04,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 11:08:04,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:04,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 11:08:04,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:04,886 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-13 11:08:04,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334444931] [2020-10-13 11:08:04,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:04,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 11:08:04,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760257316] [2020-10-13 11:08:04,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 11:08:04,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:04,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 11:08:04,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-10-13 11:08:04,888 INFO L87 Difference]: Start difference. First operand 889 states and 991 transitions. Second operand 30 states. [2020-10-13 11:08:06,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:06,205 INFO L93 Difference]: Finished difference Result 895 states and 996 transitions. [2020-10-13 11:08:06,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 11:08:06,206 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 56 [2020-10-13 11:08:06,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:06,210 INFO L225 Difference]: With dead ends: 895 [2020-10-13 11:08:06,210 INFO L226 Difference]: Without dead ends: 867 [2020-10-13 11:08:06,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=133, Invalid=2123, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 11:08:06,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2020-10-13 11:08:06,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 867. [2020-10-13 11:08:06,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 867 states. [2020-10-13 11:08:06,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 967 transitions. [2020-10-13 11:08:06,406 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 967 transitions. Word has length 56 [2020-10-13 11:08:06,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:06,406 INFO L479 AbstractCegarLoop]: Abstraction has 867 states and 967 transitions. [2020-10-13 11:08:06,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 11:08:06,406 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 967 transitions. [2020-10-13 11:08:06,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 11:08:06,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:06,413 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:08:06,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2020-10-13 11:08:06,413 INFO L427 AbstractCegarLoop]: === Iteration 93 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:06,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:06,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1717488409, now seen corresponding path program 86 times [2020-10-13 11:08:06,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:06,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662217301] [2020-10-13 11:08:06,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:06,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:06,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:06,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:06,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 11:08:06,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:06,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 380 [2020-10-13 11:08:06,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:06,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 11:08:06,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:08:06,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 11:08:06,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:06,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:06,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:06,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:06,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:06,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:08:06,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:06,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:08:06,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:06,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:06,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:06,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:06,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:06,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:08:06,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:06,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:06,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:06,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 11:08:06,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:06,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-13 11:08:06,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:06,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 11:08:06,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:06,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 11:08:06,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:07,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-13 11:08:07,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:07,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:07,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:07,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 11:08:07,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:07,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-13 11:08:07,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:07,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 11:08:07,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:07,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 11:08:07,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:07,696 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-13 11:08:07,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662217301] [2020-10-13 11:08:07,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:07,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 11:08:07,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957283014] [2020-10-13 11:08:07,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 11:08:07,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:07,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 11:08:07,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-10-13 11:08:07,698 INFO L87 Difference]: Start difference. First operand 867 states and 967 transitions. Second operand 28 states. [2020-10-13 11:08:08,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:08,905 INFO L93 Difference]: Finished difference Result 885 states and 988 transitions. [2020-10-13 11:08:08,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 11:08:08,905 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 56 [2020-10-13 11:08:08,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:08,911 INFO L225 Difference]: With dead ends: 885 [2020-10-13 11:08:08,911 INFO L226 Difference]: Without dead ends: 879 [2020-10-13 11:08:08,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=137, Invalid=2119, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 11:08:08,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2020-10-13 11:08:09,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 877. [2020-10-13 11:08:09,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 877 states. [2020-10-13 11:08:09,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 980 transitions. [2020-10-13 11:08:09,029 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 980 transitions. Word has length 56 [2020-10-13 11:08:09,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:09,029 INFO L479 AbstractCegarLoop]: Abstraction has 877 states and 980 transitions. [2020-10-13 11:08:09,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 11:08:09,029 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 980 transitions. [2020-10-13 11:08:09,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 11:08:09,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:09,033 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:08:09,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2020-10-13 11:08:09,034 INFO L427 AbstractCegarLoop]: === Iteration 94 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:09,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:09,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1667132184, now seen corresponding path program 87 times [2020-10-13 11:08:09,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:09,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480606614] [2020-10-13 11:08:09,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:09,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:09,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:09,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:09,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 11:08:09,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:09,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 398 [2020-10-13 11:08:09,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:09,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 11:08:09,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:08:09,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 11:08:09,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:09,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:09,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:09,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:09,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:09,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:08:09,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:09,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:08:09,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:09,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:09,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:09,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:09,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:09,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:08:09,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:09,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:09,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:09,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 11:08:09,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:09,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-13 11:08:09,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:09,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 11:08:09,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:09,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 11:08:09,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:09,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-13 11:08:09,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:09,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:09,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:09,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 11:08:09,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:09,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-13 11:08:09,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:09,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 11:08:09,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:08:09,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 11:08:09,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:10,342 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 11:08:10,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480606614] [2020-10-13 11:08:10,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:10,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 11:08:10,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199719311] [2020-10-13 11:08:10,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 11:08:10,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:10,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 11:08:10,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-10-13 11:08:10,344 INFO L87 Difference]: Start difference. First operand 877 states and 980 transitions. Second operand 29 states. [2020-10-13 11:08:12,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:12,161 INFO L93 Difference]: Finished difference Result 995 states and 1119 transitions. [2020-10-13 11:08:12,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 11:08:12,162 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 57 [2020-10-13 11:08:12,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:12,170 INFO L225 Difference]: With dead ends: 995 [2020-10-13 11:08:12,171 INFO L226 Difference]: Without dead ends: 981 [2020-10-13 11:08:12,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2020-10-13 11:08:12,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2020-10-13 11:08:12,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 972. [2020-10-13 11:08:12,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 972 states. [2020-10-13 11:08:12,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1089 transitions. [2020-10-13 11:08:12,408 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1089 transitions. Word has length 57 [2020-10-13 11:08:12,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:12,409 INFO L479 AbstractCegarLoop]: Abstraction has 972 states and 1089 transitions. [2020-10-13 11:08:12,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 11:08:12,409 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1089 transitions. [2020-10-13 11:08:12,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 11:08:12,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:12,417 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:08:12,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2020-10-13 11:08:12,417 INFO L427 AbstractCegarLoop]: === Iteration 95 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:12,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:12,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1861230049, now seen corresponding path program 88 times [2020-10-13 11:08:12,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:12,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784597377] [2020-10-13 11:08:12,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:12,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:12,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:12,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:12,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 11:08:12,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:12,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 420 [2020-10-13 11:08:12,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:12,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 11:08:12,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:08:12,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 11:08:12,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:12,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:12,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:12,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:12,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:12,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:08:12,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:12,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:08:12,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:12,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:12,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:12,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:12,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:12,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:08:12,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:12,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:12,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:12,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 11:08:12,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:12,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-13 11:08:12,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:12,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 11:08:12,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:12,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 11:08:12,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:13,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-13 11:08:13,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:13,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:13,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:13,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 11:08:13,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:13,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-13 11:08:13,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:13,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 11:08:13,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:08:13,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 11:08:13,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:13,751 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 11:08:13,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784597377] [2020-10-13 11:08:13,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:13,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 11:08:13,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811124516] [2020-10-13 11:08:13,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 11:08:13,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:13,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 11:08:13,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-10-13 11:08:13,752 INFO L87 Difference]: Start difference. First operand 972 states and 1089 transitions. Second operand 29 states. [2020-10-13 11:08:15,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:15,725 INFO L93 Difference]: Finished difference Result 987 states and 1104 transitions. [2020-10-13 11:08:15,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 11:08:15,727 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 57 [2020-10-13 11:08:15,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:15,732 INFO L225 Difference]: With dead ends: 987 [2020-10-13 11:08:15,732 INFO L226 Difference]: Without dead ends: 975 [2020-10-13 11:08:15,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=867, Unknown=0, NotChecked=0, Total=930 [2020-10-13 11:08:15,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2020-10-13 11:08:15,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 973. [2020-10-13 11:08:15,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 973 states. [2020-10-13 11:08:15,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1085 transitions. [2020-10-13 11:08:15,871 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1085 transitions. Word has length 57 [2020-10-13 11:08:15,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:15,872 INFO L479 AbstractCegarLoop]: Abstraction has 973 states and 1085 transitions. [2020-10-13 11:08:15,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 11:08:15,872 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1085 transitions. [2020-10-13 11:08:15,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 11:08:15,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:15,877 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:08:15,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2020-10-13 11:08:15,878 INFO L427 AbstractCegarLoop]: === Iteration 96 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:15,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:15,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1655961118, now seen corresponding path program 89 times [2020-10-13 11:08:15,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:15,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672469683] [2020-10-13 11:08:15,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:15,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:15,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:16,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:16,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 11:08:16,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:16,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-13 11:08:16,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:16,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 11:08:16,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:08:16,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 11:08:16,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:16,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:16,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:16,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:16,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:16,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:08:16,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:16,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:08:16,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:16,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:16,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:16,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:16,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:16,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:08:16,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:16,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:16,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:16,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 11:08:16,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:16,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-13 11:08:16,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:16,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 11:08:16,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:08:16,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 11:08:16,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:16,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-13 11:08:16,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:16,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:16,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:16,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 11:08:16,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:16,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 11:08:16,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:16,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:16,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 11:08:16,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:16,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:16,330 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-10-13 11:08:16,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672469683] [2020-10-13 11:08:16,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:16,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 11:08:16,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294847467] [2020-10-13 11:08:16,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 11:08:16,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:16,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 11:08:16,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-13 11:08:16,331 INFO L87 Difference]: Start difference. First operand 973 states and 1085 transitions. Second operand 16 states. [2020-10-13 11:08:17,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:17,039 INFO L93 Difference]: Finished difference Result 1639 states and 1818 transitions. [2020-10-13 11:08:17,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 11:08:17,040 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2020-10-13 11:08:17,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:17,056 INFO L225 Difference]: With dead ends: 1639 [2020-10-13 11:08:17,056 INFO L226 Difference]: Without dead ends: 1119 [2020-10-13 11:08:17,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=616, Invalid=1190, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 11:08:17,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2020-10-13 11:08:17,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1083. [2020-10-13 11:08:17,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1083 states. [2020-10-13 11:08:17,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 1208 transitions. [2020-10-13 11:08:17,298 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 1208 transitions. Word has length 57 [2020-10-13 11:08:17,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:17,298 INFO L479 AbstractCegarLoop]: Abstraction has 1083 states and 1208 transitions. [2020-10-13 11:08:17,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 11:08:17,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 1208 transitions. [2020-10-13 11:08:17,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 11:08:17,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:17,303 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:08:17,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2020-10-13 11:08:17,303 INFO L427 AbstractCegarLoop]: === Iteration 97 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:17,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:17,304 INFO L82 PathProgramCache]: Analyzing trace with hash -259096743, now seen corresponding path program 90 times [2020-10-13 11:08:17,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:17,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848454807] [2020-10-13 11:08:17,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:17,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:17,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:17,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:17,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 11:08:17,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:17,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 264 [2020-10-13 11:08:17,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:17,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 11:08:17,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-13 11:08:17,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 11:08:17,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:17,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:17,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:17,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:17,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:17,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:08:17,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:17,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:08:17,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:17,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:17,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:17,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:17,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:17,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:08:17,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:17,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:17,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:17,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 11:08:17,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:17,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 11:08:17,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:17,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:17,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:17,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:17,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:17,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-13 11:08:17,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:17,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:17,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:17,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 11:08:17,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:17,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-13 11:08:17,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:17,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 11:08:17,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:08:17,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 11:08:17,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:17,803 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-10-13 11:08:17,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848454807] [2020-10-13 11:08:17,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:17,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 11:08:17,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071091594] [2020-10-13 11:08:17,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 11:08:17,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:17,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 11:08:17,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-13 11:08:17,805 INFO L87 Difference]: Start difference. First operand 1083 states and 1208 transitions. Second operand 16 states. [2020-10-13 11:08:18,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:18,567 INFO L93 Difference]: Finished difference Result 1283 states and 1445 transitions. [2020-10-13 11:08:18,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 11:08:18,568 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2020-10-13 11:08:18,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:18,575 INFO L225 Difference]: With dead ends: 1283 [2020-10-13 11:08:18,575 INFO L226 Difference]: Without dead ends: 1229 [2020-10-13 11:08:18,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=616, Invalid=1190, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 11:08:18,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2020-10-13 11:08:18,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1193. [2020-10-13 11:08:18,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1193 states. [2020-10-13 11:08:18,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 1331 transitions. [2020-10-13 11:08:18,771 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 1331 transitions. Word has length 57 [2020-10-13 11:08:18,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:18,771 INFO L479 AbstractCegarLoop]: Abstraction has 1193 states and 1331 transitions. [2020-10-13 11:08:18,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 11:08:18,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 1331 transitions. [2020-10-13 11:08:18,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 11:08:18,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:18,778 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:08:18,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2020-10-13 11:08:18,778 INFO L427 AbstractCegarLoop]: === Iteration 98 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:18,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:18,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1898828526, now seen corresponding path program 91 times [2020-10-13 11:08:18,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:18,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443713592] [2020-10-13 11:08:18,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:18,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:18,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:19,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:19,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 11:08:19,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:19,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 519 [2020-10-13 11:08:19,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:19,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 11:08:19,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:08:19,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 11:08:19,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:19,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:19,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:19,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:19,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:08:19,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:19,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:08:19,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:19,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:19,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:19,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:19,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:19,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:08:19,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:19,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:19,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:19,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 11:08:19,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:19,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-13 11:08:19,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:19,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 11:08:19,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:19,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 11:08:19,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:19,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-13 11:08:19,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:19,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:20,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:20,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 11:08:20,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:20,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-13 11:08:20,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:20,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 11:08:20,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:20,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 11:08:20,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:20,906 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:08:20,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443713592] [2020-10-13 11:08:20,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:20,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 11:08:20,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591499653] [2020-10-13 11:08:20,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 11:08:20,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:20,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 11:08:20,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 11:08:20,908 INFO L87 Difference]: Start difference. First operand 1193 states and 1331 transitions. Second operand 40 states. [2020-10-13 11:08:23,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:23,193 INFO L93 Difference]: Finished difference Result 1335 states and 1490 transitions. [2020-10-13 11:08:23,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 11:08:23,194 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 58 [2020-10-13 11:08:23,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:23,202 INFO L225 Difference]: With dead ends: 1335 [2020-10-13 11:08:23,202 INFO L226 Difference]: Without dead ends: 1329 [2020-10-13 11:08:23,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=121, Invalid=2329, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 11:08:23,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2020-10-13 11:08:23,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 1209. [2020-10-13 11:08:23,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1209 states. [2020-10-13 11:08:23,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 1350 transitions. [2020-10-13 11:08:23,398 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 1350 transitions. Word has length 58 [2020-10-13 11:08:23,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:23,399 INFO L479 AbstractCegarLoop]: Abstraction has 1209 states and 1350 transitions. [2020-10-13 11:08:23,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 11:08:23,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 1350 transitions. [2020-10-13 11:08:23,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 11:08:23,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:23,405 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:08:23,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2020-10-13 11:08:23,406 INFO L427 AbstractCegarLoop]: === Iteration 99 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:23,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:23,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1746925966, now seen corresponding path program 92 times [2020-10-13 11:08:23,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:23,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691689003] [2020-10-13 11:08:23,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:23,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:23,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:23,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:23,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 11:08:23,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:23,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 582 [2020-10-13 11:08:24,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:24,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 11:08:24,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:08:24,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 11:08:24,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:24,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:24,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:24,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:24,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:24,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:08:24,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:24,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:08:24,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:24,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:24,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:24,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:24,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:24,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:08:24,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:24,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:24,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:24,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 11:08:24,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:24,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-13 11:08:24,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:24,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 11:08:24,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:24,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 11:08:24,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:24,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-13 11:08:24,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:24,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:24,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:24,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 11:08:24,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:24,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-13 11:08:24,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:24,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 11:08:24,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:24,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 11:08:24,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:25,480 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 11:08:25,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691689003] [2020-10-13 11:08:25,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:25,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 11:08:25,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297539517] [2020-10-13 11:08:25,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 11:08:25,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:25,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 11:08:25,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 11:08:25,481 INFO L87 Difference]: Start difference. First operand 1209 states and 1350 transitions. Second operand 38 states. [2020-10-13 11:08:27,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:27,468 INFO L93 Difference]: Finished difference Result 1215 states and 1355 transitions. [2020-10-13 11:08:27,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 11:08:27,469 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 58 [2020-10-13 11:08:27,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:27,475 INFO L225 Difference]: With dead ends: 1215 [2020-10-13 11:08:27,475 INFO L226 Difference]: Without dead ends: 1193 [2020-10-13 11:08:27,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=125, Invalid=2325, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 11:08:27,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2020-10-13 11:08:27,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 1193. [2020-10-13 11:08:27,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1193 states. [2020-10-13 11:08:27,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 1332 transitions. [2020-10-13 11:08:27,682 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 1332 transitions. Word has length 58 [2020-10-13 11:08:27,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:27,683 INFO L479 AbstractCegarLoop]: Abstraction has 1193 states and 1332 transitions. [2020-10-13 11:08:27,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 11:08:27,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 1332 transitions. [2020-10-13 11:08:27,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 11:08:27,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:27,689 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:08:27,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2020-10-13 11:08:27,690 INFO L427 AbstractCegarLoop]: === Iteration 100 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:27,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:27,690 INFO L82 PathProgramCache]: Analyzing trace with hash 702007698, now seen corresponding path program 93 times [2020-10-13 11:08:27,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:27,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514815001] [2020-10-13 11:08:27,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:27,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:27,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:28,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:28,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 11:08:28,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:28,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 565 [2020-10-13 11:08:28,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:28,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 11:08:28,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:08:28,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 11:08:28,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:28,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:28,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:28,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:28,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:28,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:08:28,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:28,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:08:28,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:28,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:28,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:28,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:28,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:28,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:08:28,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:28,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:28,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:28,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 11:08:28,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:28,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-13 11:08:28,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:28,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 11:08:28,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:28,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 11:08:28,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:28,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-13 11:08:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:28,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:28,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:28,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 11:08:28,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:28,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-13 11:08:28,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:28,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 11:08:28,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:28,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 11:08:28,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:29,590 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 11:08:29,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514815001] [2020-10-13 11:08:29,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:29,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 11:08:29,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324397659] [2020-10-13 11:08:29,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 11:08:29,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:29,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 11:08:29,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 11:08:29,591 INFO L87 Difference]: Start difference. First operand 1193 states and 1332 transitions. Second operand 36 states. [2020-10-13 11:08:31,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:31,496 INFO L93 Difference]: Finished difference Result 1199 states and 1337 transitions. [2020-10-13 11:08:31,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 11:08:31,497 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 58 [2020-10-13 11:08:31,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:31,503 INFO L225 Difference]: With dead ends: 1199 [2020-10-13 11:08:31,503 INFO L226 Difference]: Without dead ends: 1175 [2020-10-13 11:08:31,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=129, Invalid=2321, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 11:08:31,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2020-10-13 11:08:31,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 1175. [2020-10-13 11:08:31,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1175 states. [2020-10-13 11:08:31,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 1312 transitions. [2020-10-13 11:08:31,747 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 1312 transitions. Word has length 58 [2020-10-13 11:08:31,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:31,747 INFO L479 AbstractCegarLoop]: Abstraction has 1175 states and 1312 transitions. [2020-10-13 11:08:31,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 11:08:31,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 1312 transitions. [2020-10-13 11:08:31,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 11:08:31,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:31,754 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 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 11:08:31,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2020-10-13 11:08:31,754 INFO L427 AbstractCegarLoop]: === Iteration 101 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:31,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:31,754 INFO L82 PathProgramCache]: Analyzing trace with hash -901912078, now seen corresponding path program 94 times [2020-10-13 11:08:31,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:31,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281362292] [2020-10-13 11:08:31,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:31,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:31,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:32,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:32,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 11:08:32,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:32,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 550 [2020-10-13 11:08:32,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:32,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 11:08:32,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:08:32,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 11:08:32,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:32,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:32,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:32,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:32,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:32,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:08:32,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:32,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:08:32,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:32,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:32,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:32,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:32,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:32,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:08:32,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:32,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:32,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:32,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 11:08:32,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:32,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-13 11:08:32,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:32,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 11:08:32,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:32,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 11:08:32,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:32,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-13 11:08:32,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:32,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:32,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:32,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 11:08:32,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:32,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-13 11:08:32,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:32,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 11:08:32,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:32,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 11:08:32,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:33,539 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-13 11:08:33,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281362292] [2020-10-13 11:08:33,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:33,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 11:08:33,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385162654] [2020-10-13 11:08:33,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 11:08:33,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:33,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 11:08:33,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 11:08:33,541 INFO L87 Difference]: Start difference. First operand 1175 states and 1312 transitions. Second operand 34 states. [2020-10-13 11:08:35,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:35,220 INFO L93 Difference]: Finished difference Result 1181 states and 1317 transitions. [2020-10-13 11:08:35,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 11:08:35,221 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 58 [2020-10-13 11:08:35,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:35,226 INFO L225 Difference]: With dead ends: 1181 [2020-10-13 11:08:35,226 INFO L226 Difference]: Without dead ends: 1155 [2020-10-13 11:08:35,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=133, Invalid=2317, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 11:08:35,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2020-10-13 11:08:35,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 1155. [2020-10-13 11:08:35,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1155 states. [2020-10-13 11:08:35,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 1290 transitions. [2020-10-13 11:08:35,407 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 1290 transitions. Word has length 58 [2020-10-13 11:08:35,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:35,407 INFO L479 AbstractCegarLoop]: Abstraction has 1155 states and 1290 transitions. [2020-10-13 11:08:35,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 11:08:35,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 1290 transitions. [2020-10-13 11:08:35,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 11:08:35,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:35,413 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 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 11:08:35,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2020-10-13 11:08:35,413 INFO L427 AbstractCegarLoop]: === Iteration 102 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:35,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:35,413 INFO L82 PathProgramCache]: Analyzing trace with hash -2000132590, now seen corresponding path program 95 times [2020-10-13 11:08:35,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:35,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341686109] [2020-10-13 11:08:35,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:35,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:35,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:35,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:35,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 11:08:35,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:35,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 500 [2020-10-13 11:08:35,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:35,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 11:08:35,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:08:35,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 11:08:35,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:35,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:35,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:35,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:36,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:36,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:08:36,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:36,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:08:36,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:36,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:36,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:36,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:36,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:36,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:08:36,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:36,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:36,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:36,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 11:08:36,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:36,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-13 11:08:36,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:36,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 11:08:36,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:36,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 11:08:36,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:36,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-13 11:08:36,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:36,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:36,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:36,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 11:08:36,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:36,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-13 11:08:36,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:36,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 11:08:36,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:36,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 11:08:36,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:37,044 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-13 11:08:37,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341686109] [2020-10-13 11:08:37,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:37,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 11:08:37,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097731840] [2020-10-13 11:08:37,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 11:08:37,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:37,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 11:08:37,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2020-10-13 11:08:37,045 INFO L87 Difference]: Start difference. First operand 1155 states and 1290 transitions. Second operand 32 states. [2020-10-13 11:08:38,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:38,633 INFO L93 Difference]: Finished difference Result 1161 states and 1295 transitions. [2020-10-13 11:08:38,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 11:08:38,633 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 58 [2020-10-13 11:08:38,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:38,638 INFO L225 Difference]: With dead ends: 1161 [2020-10-13 11:08:38,638 INFO L226 Difference]: Without dead ends: 1133 [2020-10-13 11:08:38,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=137, Invalid=2313, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 11:08:38,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2020-10-13 11:08:38,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 1133. [2020-10-13 11:08:38,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1133 states. [2020-10-13 11:08:38,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 1266 transitions. [2020-10-13 11:08:38,812 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 1266 transitions. Word has length 58 [2020-10-13 11:08:38,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:38,812 INFO L479 AbstractCegarLoop]: Abstraction has 1133 states and 1266 transitions. [2020-10-13 11:08:38,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 11:08:38,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 1266 transitions. [2020-10-13 11:08:38,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 11:08:38,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:38,817 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:08:38,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2020-10-13 11:08:38,818 INFO L427 AbstractCegarLoop]: === Iteration 103 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:38,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:38,818 INFO L82 PathProgramCache]: Analyzing trace with hash 742392839, now seen corresponding path program 96 times [2020-10-13 11:08:38,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:38,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462685558] [2020-10-13 11:08:38,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:38,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:38,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:39,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:39,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 11:08:39,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:39,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 288 [2020-10-13 11:08:39,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:39,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 11:08:39,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:08:39,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 11:08:39,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:39,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:39,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:39,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:39,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:39,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:08:39,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:39,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:08:39,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:39,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:39,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:39,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:39,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:39,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:08:39,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:39,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:39,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:39,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 11:08:39,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:39,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-13 11:08:39,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:39,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 11:08:39,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:39,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 11:08:39,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:39,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-13 11:08:39,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:39,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:39,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:39,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 11:08:39,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:39,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-13 11:08:39,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:39,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 11:08:39,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:08:39,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 11:08:39,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:39,586 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-13 11:08:39,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462685558] [2020-10-13 11:08:39,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:39,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 11:08:39,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252601347] [2020-10-13 11:08:39,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 11:08:39,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:39,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 11:08:39,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-13 11:08:39,587 INFO L87 Difference]: Start difference. First operand 1133 states and 1266 transitions. Second operand 19 states. [2020-10-13 11:08:40,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:40,542 INFO L93 Difference]: Finished difference Result 1237 states and 1392 transitions. [2020-10-13 11:08:40,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 11:08:40,544 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 58 [2020-10-13 11:08:40,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:40,557 INFO L225 Difference]: With dead ends: 1237 [2020-10-13 11:08:40,557 INFO L226 Difference]: Without dead ends: 1218 [2020-10-13 11:08:40,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-10-13 11:08:40,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2020-10-13 11:08:40,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 1213. [2020-10-13 11:08:40,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1213 states. [2020-10-13 11:08:40,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 1356 transitions. [2020-10-13 11:08:40,743 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 1356 transitions. Word has length 58 [2020-10-13 11:08:40,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:40,743 INFO L479 AbstractCegarLoop]: Abstraction has 1213 states and 1356 transitions. [2020-10-13 11:08:40,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 11:08:40,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 1356 transitions. [2020-10-13 11:08:40,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 11:08:40,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:40,750 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:08:40,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2020-10-13 11:08:40,750 INFO L427 AbstractCegarLoop]: === Iteration 104 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:40,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:40,750 INFO L82 PathProgramCache]: Analyzing trace with hash 21810546, now seen corresponding path program 97 times [2020-10-13 11:08:40,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:40,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415490279] [2020-10-13 11:08:40,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:40,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:40,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:41,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:41,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 11:08:41,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:41,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 433 [2020-10-13 11:08:41,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:41,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 11:08:41,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:08:41,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 11:08:41,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:41,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:41,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:41,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:41,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:41,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:08:41,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:41,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:08:41,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:41,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:41,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:41,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:41,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:41,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:08:41,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:41,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:41,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:41,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 11:08:41,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:41,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-13 11:08:41,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:41,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 11:08:41,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:41,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 11:08:41,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:41,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-13 11:08:41,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:41,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:41,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:41,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 11:08:41,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:41,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-13 11:08:41,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:41,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 11:08:41,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:41,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 11:08:41,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:42,215 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-13 11:08:42,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415490279] [2020-10-13 11:08:42,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:42,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 11:08:42,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130827807] [2020-10-13 11:08:42,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 11:08:42,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:42,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 11:08:42,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-10-13 11:08:42,216 INFO L87 Difference]: Start difference. First operand 1213 states and 1356 transitions. Second operand 30 states. [2020-10-13 11:08:43,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:43,737 INFO L93 Difference]: Finished difference Result 1231 states and 1378 transitions. [2020-10-13 11:08:43,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 11:08:43,739 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2020-10-13 11:08:43,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:43,746 INFO L225 Difference]: With dead ends: 1231 [2020-10-13 11:08:43,746 INFO L226 Difference]: Without dead ends: 1212 [2020-10-13 11:08:43,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=141, Invalid=2309, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 11:08:43,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2020-10-13 11:08:43,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 1207. [2020-10-13 11:08:43,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1207 states. [2020-10-13 11:08:43,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 1351 transitions. [2020-10-13 11:08:43,933 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 1351 transitions. Word has length 58 [2020-10-13 11:08:43,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:43,933 INFO L479 AbstractCegarLoop]: Abstraction has 1207 states and 1351 transitions. [2020-10-13 11:08:43,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 11:08:43,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 1351 transitions. [2020-10-13 11:08:43,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 11:08:43,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:43,940 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:08:43,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2020-10-13 11:08:43,940 INFO L427 AbstractCegarLoop]: === Iteration 105 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:43,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:43,940 INFO L82 PathProgramCache]: Analyzing trace with hash -662124661, now seen corresponding path program 98 times [2020-10-13 11:08:43,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:43,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317948982] [2020-10-13 11:08:43,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:43,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:43,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:44,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:44,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 11:08:44,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:44,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-13 11:08:44,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:44,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 11:08:44,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:08:44,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 11:08:44,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:44,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:44,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:44,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:44,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:44,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:08:44,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:44,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:08:44,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:44,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:44,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:44,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:44,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:44,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:08:44,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:44,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:44,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:44,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 11:08:44,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:44,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-13 11:08:44,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:44,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 11:08:44,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:44,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 11:08:44,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:44,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 11:08:44,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:44,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:44,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:44,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 11:08:44,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:44,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-13 11:08:44,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:44,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 11:08:44,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:08:44,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 11:08:44,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:44,692 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-13 11:08:44,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317948982] [2020-10-13 11:08:44,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:44,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 11:08:44,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727844431] [2020-10-13 11:08:44,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 11:08:44,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:44,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 11:08:44,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-13 11:08:44,693 INFO L87 Difference]: Start difference. First operand 1207 states and 1351 transitions. Second operand 19 states. [2020-10-13 11:08:45,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:45,637 INFO L93 Difference]: Finished difference Result 1221 states and 1364 transitions. [2020-10-13 11:08:45,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 11:08:45,638 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 58 [2020-10-13 11:08:45,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:45,644 INFO L225 Difference]: With dead ends: 1221 [2020-10-13 11:08:45,644 INFO L226 Difference]: Without dead ends: 1193 [2020-10-13 11:08:45,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-10-13 11:08:45,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2020-10-13 11:08:45,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 1191. [2020-10-13 11:08:45,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1191 states. [2020-10-13 11:08:45,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 1323 transitions. [2020-10-13 11:08:45,824 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 1323 transitions. Word has length 58 [2020-10-13 11:08:45,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:45,824 INFO L479 AbstractCegarLoop]: Abstraction has 1191 states and 1323 transitions. [2020-10-13 11:08:45,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 11:08:45,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 1323 transitions. [2020-10-13 11:08:45,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 11:08:45,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:45,836 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:08:45,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2020-10-13 11:08:45,836 INFO L427 AbstractCegarLoop]: === Iteration 106 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:45,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:45,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1230585983, now seen corresponding path program 99 times [2020-10-13 11:08:45,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:45,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421047675] [2020-10-13 11:08:45,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:45,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:45,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:46,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:46,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 11:08:46,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:46,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 562 [2020-10-13 11:08:46,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:46,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 11:08:46,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:08:46,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 11:08:46,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:46,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:46,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:46,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:46,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:46,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:08:46,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:46,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:08:46,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:46,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:46,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:46,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:46,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:46,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:08:46,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:46,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:46,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:46,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 11:08:46,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:46,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-13 11:08:46,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:46,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 11:08:46,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:46,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 11:08:46,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:46,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-13 11:08:46,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:46,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:46,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:46,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 11:08:46,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:46,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-13 11:08:46,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:46,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 11:08:46,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:08:46,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 11:08:46,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:47,383 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 11:08:47,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421047675] [2020-10-13 11:08:47,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:47,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 11:08:47,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816936992] [2020-10-13 11:08:47,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 11:08:47,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:47,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 11:08:47,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-10-13 11:08:47,385 INFO L87 Difference]: Start difference. First operand 1191 states and 1323 transitions. Second operand 31 states. [2020-10-13 11:08:49,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:49,549 INFO L93 Difference]: Finished difference Result 1335 states and 1492 transitions. [2020-10-13 11:08:49,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 11:08:49,550 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 59 [2020-10-13 11:08:49,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:49,561 INFO L225 Difference]: With dead ends: 1335 [2020-10-13 11:08:49,561 INFO L226 Difference]: Without dead ends: 1321 [2020-10-13 11:08:49,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=67, Invalid=989, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 11:08:49,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2020-10-13 11:08:49,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 1312. [2020-10-13 11:08:49,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1312 states. [2020-10-13 11:08:49,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 1461 transitions. [2020-10-13 11:08:49,770 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 1461 transitions. Word has length 59 [2020-10-13 11:08:49,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:49,771 INFO L479 AbstractCegarLoop]: Abstraction has 1312 states and 1461 transitions. [2020-10-13 11:08:49,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 11:08:49,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 1461 transitions. [2020-10-13 11:08:49,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 11:08:49,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:49,779 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:08:49,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2020-10-13 11:08:49,779 INFO L427 AbstractCegarLoop]: === Iteration 107 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:49,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:49,779 INFO L82 PathProgramCache]: Analyzing trace with hash -774460840, now seen corresponding path program 100 times [2020-10-13 11:08:49,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:49,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828437705] [2020-10-13 11:08:49,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:49,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:49,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:50,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:50,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 11:08:50,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:50,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 502 [2020-10-13 11:08:50,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:50,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 11:08:50,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:08:50,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 11:08:50,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:50,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:50,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:50,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:50,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:50,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:08:50,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:50,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:08:50,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:50,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:50,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:50,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:50,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:50,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:08:50,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:50,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:50,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:50,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 11:08:50,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:50,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-13 11:08:50,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:50,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 11:08:50,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:50,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 11:08:50,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:50,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 11:08:50,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:50,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:50,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:50,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 11:08:50,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:50,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-13 11:08:50,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:50,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 11:08:50,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:08:50,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 11:08:50,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:51,343 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 11:08:51,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828437705] [2020-10-13 11:08:51,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:51,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 11:08:51,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496782921] [2020-10-13 11:08:51,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 11:08:51,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:51,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 11:08:51,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-10-13 11:08:51,344 INFO L87 Difference]: Start difference. First operand 1312 states and 1461 transitions. Second operand 31 states. [2020-10-13 11:08:53,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:53,532 INFO L93 Difference]: Finished difference Result 1327 states and 1476 transitions. [2020-10-13 11:08:53,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 11:08:53,534 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 59 [2020-10-13 11:08:53,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:53,541 INFO L225 Difference]: With dead ends: 1327 [2020-10-13 11:08:53,541 INFO L226 Difference]: Without dead ends: 1315 [2020-10-13 11:08:53,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=929, Unknown=0, NotChecked=0, Total=992 [2020-10-13 11:08:53,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2020-10-13 11:08:53,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1313. [2020-10-13 11:08:53,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1313 states. [2020-10-13 11:08:53,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 1456 transitions. [2020-10-13 11:08:53,758 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 1456 transitions. Word has length 59 [2020-10-13 11:08:53,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:53,759 INFO L479 AbstractCegarLoop]: Abstraction has 1313 states and 1456 transitions. [2020-10-13 11:08:53,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 11:08:53,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 1456 transitions. [2020-10-13 11:08:53,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 11:08:53,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:53,767 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:08:53,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2020-10-13 11:08:53,767 INFO L427 AbstractCegarLoop]: === Iteration 108 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:53,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:53,768 INFO L82 PathProgramCache]: Analyzing trace with hash -666334599, now seen corresponding path program 101 times [2020-10-13 11:08:53,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:53,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543413078] [2020-10-13 11:08:53,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:53,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:53,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:54,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:54,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 11:08:54,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:54,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 301 [2020-10-13 11:08:54,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:54,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 11:08:54,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 11:08:54,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 11:08:54,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:54,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:54,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:54,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:54,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:54,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:08:54,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:54,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:08:54,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:54,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:54,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:54,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:54,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:54,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:08:54,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:54,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:54,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:54,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 11:08:54,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:54,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 11:08:54,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:54,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:54,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:54,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:54,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:54,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 11:08:54,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:54,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:54,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:54,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 11:08:54,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:54,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-13 11:08:54,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:54,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 11:08:54,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:08:54,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 11:08:54,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:54,327 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-10-13 11:08:54,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543413078] [2020-10-13 11:08:54,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:54,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 11:08:54,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413883240] [2020-10-13 11:08:54,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 11:08:54,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:54,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 11:08:54,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-13 11:08:54,328 INFO L87 Difference]: Start difference. First operand 1313 states and 1456 transitions. Second operand 17 states. [2020-10-13 11:08:55,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:55,230 INFO L93 Difference]: Finished difference Result 1363 states and 1516 transitions. [2020-10-13 11:08:55,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 11:08:55,231 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 59 [2020-10-13 11:08:55,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:55,238 INFO L225 Difference]: With dead ends: 1363 [2020-10-13 11:08:55,238 INFO L226 Difference]: Without dead ends: 1318 [2020-10-13 11:08:55,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=696, Invalid=1284, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 11:08:55,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2020-10-13 11:08:55,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1306. [2020-10-13 11:08:55,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1306 states. [2020-10-13 11:08:55,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 1443 transitions. [2020-10-13 11:08:55,456 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 1443 transitions. Word has length 59 [2020-10-13 11:08:55,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:55,456 INFO L479 AbstractCegarLoop]: Abstraction has 1306 states and 1443 transitions. [2020-10-13 11:08:55,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 11:08:55,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 1443 transitions. [2020-10-13 11:08:55,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 11:08:55,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:55,469 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:08:55,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2020-10-13 11:08:55,469 INFO L427 AbstractCegarLoop]: === Iteration 109 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:55,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:55,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1486551934, now seen corresponding path program 102 times [2020-10-13 11:08:55,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:55,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483738996] [2020-10-13 11:08:55,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:55,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:55,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:55,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:55,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 11:08:55,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:55,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 245 [2020-10-13 11:08:55,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:55,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 11:08:55,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:08:55,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 11:08:55,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:55,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:55,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:55,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:55,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:55,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:08:55,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:55,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:08:55,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:55,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:55,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:55,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:55,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:55,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:08:55,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:55,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:55,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:55,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 11:08:55,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:55,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-13 11:08:55,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:55,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 11:08:55,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:08:55,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 11:08:55,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:08:56,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-13 11:08:56,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:56,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:56,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:56,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 11:08:56,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:56,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 11:08:56,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:56,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:56,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 11:08:56,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:56,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:56,040 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-10-13 11:08:56,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483738996] [2020-10-13 11:08:56,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:56,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 11:08:56,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533827045] [2020-10-13 11:08:56,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 11:08:56,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:56,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 11:08:56,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-13 11:08:56,042 INFO L87 Difference]: Start difference. First operand 1306 states and 1443 transitions. Second operand 17 states. [2020-10-13 11:08:56,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:56,813 INFO L93 Difference]: Finished difference Result 1994 states and 2176 transitions. [2020-10-13 11:08:56,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 11:08:56,814 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 59 [2020-10-13 11:08:56,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:56,828 INFO L225 Difference]: With dead ends: 1994 [2020-10-13 11:08:56,828 INFO L226 Difference]: Without dead ends: 1319 [2020-10-13 11:08:56,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=696, Invalid=1284, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 11:08:56,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2020-10-13 11:08:57,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 1319. [2020-10-13 11:08:57,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1319 states. [2020-10-13 11:08:57,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 1456 transitions. [2020-10-13 11:08:57,111 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 1456 transitions. Word has length 59 [2020-10-13 11:08:57,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:57,111 INFO L479 AbstractCegarLoop]: Abstraction has 1319 states and 1456 transitions. [2020-10-13 11:08:57,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 11:08:57,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 1456 transitions. [2020-10-13 11:08:57,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 11:08:57,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:57,119 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:08:57,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2020-10-13 11:08:57,120 INFO L427 AbstractCegarLoop]: === Iteration 110 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:57,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:57,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1726245881, now seen corresponding path program 103 times [2020-10-13 11:08:57,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:57,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491387024] [2020-10-13 11:08:57,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:57,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:57,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:57,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:57,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 11:08:57,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:57,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 566 [2020-10-13 11:08:57,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:57,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 11:08:57,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:08:57,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 11:08:57,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:57,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:57,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:57,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:57,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:57,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:08:57,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:57,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:08:57,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:57,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:57,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:57,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:57,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:57,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:08:57,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:57,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:57,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:57,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 11:08:57,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:57,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-13 11:08:57,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:57,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 11:08:57,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:57,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 11:08:57,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:58,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 11:08:58,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:58,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:58,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:58,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 11:08:58,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:58,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-13 11:08:58,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:58,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 11:08:58,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:58,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 11:08:58,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:59,427 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:08:59,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491387024] [2020-10-13 11:08:59,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:59,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 11:08:59,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933640125] [2020-10-13 11:08:59,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 11:08:59,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:59,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 11:08:59,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 11:08:59,429 INFO L87 Difference]: Start difference. First operand 1319 states and 1456 transitions. Second operand 42 states. [2020-10-13 11:09:01,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:09:01,860 INFO L93 Difference]: Finished difference Result 1469 states and 1623 transitions. [2020-10-13 11:09:01,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 11:09:01,861 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 60 [2020-10-13 11:09:01,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:09:01,872 INFO L225 Difference]: With dead ends: 1469 [2020-10-13 11:09:01,872 INFO L226 Difference]: Without dead ends: 1463 [2020-10-13 11:09:01,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=125, Invalid=2527, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 11:09:01,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2020-10-13 11:09:02,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 1335. [2020-10-13 11:09:02,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1335 states. [2020-10-13 11:09:02,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 1475 transitions. [2020-10-13 11:09:02,160 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 1475 transitions. Word has length 60 [2020-10-13 11:09:02,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:09:02,160 INFO L479 AbstractCegarLoop]: Abstraction has 1335 states and 1475 transitions. [2020-10-13 11:09:02,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 11:09:02,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 1475 transitions. [2020-10-13 11:09:02,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 11:09:02,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:09:02,168 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:09:02,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2020-10-13 11:09:02,168 INFO L427 AbstractCegarLoop]: === Iteration 111 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:09:02,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:09:02,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1280100409, now seen corresponding path program 104 times [2020-10-13 11:09:02,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:09:02,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251163794] [2020-10-13 11:09:02,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:09:02,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:02,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:02,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:02,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 11:09:02,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:02,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 589 [2020-10-13 11:09:02,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:02,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 11:09:02,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:09:02,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 11:09:02,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:02,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:09:02,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:02,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:02,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:02,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:09:02,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:02,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:09:02,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:02,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:09:02,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:02,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:09:02,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:02,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:09:02,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:02,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:02,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:02,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 11:09:02,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:02,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-13 11:09:02,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:02,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 11:09:02,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:02,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 11:09:02,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:03,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 11:09:03,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:03,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:03,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:03,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 11:09:03,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:03,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-13 11:09:03,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:03,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 11:09:03,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:03,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 11:09:03,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:04,462 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 11:09:04,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251163794] [2020-10-13 11:09:04,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:09:04,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 11:09:04,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353343757] [2020-10-13 11:09:04,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 11:09:04,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:09:04,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 11:09:04,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 11:09:04,464 INFO L87 Difference]: Start difference. First operand 1335 states and 1475 transitions. Second operand 40 states. [2020-10-13 11:09:06,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:09:06,824 INFO L93 Difference]: Finished difference Result 1341 states and 1480 transitions. [2020-10-13 11:09:06,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 11:09:06,825 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 60 [2020-10-13 11:09:06,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:09:06,832 INFO L225 Difference]: With dead ends: 1341 [2020-10-13 11:09:06,833 INFO L226 Difference]: Without dead ends: 1319 [2020-10-13 11:09:06,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=129, Invalid=2523, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 11:09:06,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2020-10-13 11:09:07,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 1319. [2020-10-13 11:09:07,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1319 states. [2020-10-13 11:09:07,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 1457 transitions. [2020-10-13 11:09:07,049 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 1457 transitions. Word has length 60 [2020-10-13 11:09:07,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:09:07,049 INFO L479 AbstractCegarLoop]: Abstraction has 1319 states and 1457 transitions. [2020-10-13 11:09:07,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 11:09:07,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 1457 transitions. [2020-10-13 11:09:07,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 11:09:07,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:09:07,057 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:09:07,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2020-10-13 11:09:07,057 INFO L427 AbstractCegarLoop]: === Iteration 112 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:09:07,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:09:07,057 INFO L82 PathProgramCache]: Analyzing trace with hash -245814279, now seen corresponding path program 105 times [2020-10-13 11:09:07,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:09:07,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818885499] [2020-10-13 11:09:07,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:09:07,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:07,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:07,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:07,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 11:09:07,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:07,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 566 [2020-10-13 11:09:07,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:07,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 11:09:07,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:09:07,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 11:09:07,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:07,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:09:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:07,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:07,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:07,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:09:07,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:07,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:09:07,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:07,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:09:07,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:07,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:09:07,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:07,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:09:07,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:07,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:07,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:07,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 11:09:07,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:07,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-13 11:09:07,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:07,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 11:09:07,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:07,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 11:09:07,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:08,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 11:09:08,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:08,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:08,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:08,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 11:09:08,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:08,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-13 11:09:08,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:08,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 11:09:08,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:08,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 11:09:08,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:09,146 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 11:09:09,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818885499] [2020-10-13 11:09:09,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:09:09,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 11:09:09,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038731189] [2020-10-13 11:09:09,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 11:09:09,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:09:09,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 11:09:09,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 11:09:09,147 INFO L87 Difference]: Start difference. First operand 1319 states and 1457 transitions. Second operand 38 states. [2020-10-13 11:09:11,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:09:11,240 INFO L93 Difference]: Finished difference Result 1325 states and 1462 transitions. [2020-10-13 11:09:11,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 11:09:11,241 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 60 [2020-10-13 11:09:11,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:09:11,247 INFO L225 Difference]: With dead ends: 1325 [2020-10-13 11:09:11,247 INFO L226 Difference]: Without dead ends: 1301 [2020-10-13 11:09:11,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=133, Invalid=2519, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 11:09:11,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2020-10-13 11:09:11,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 1301. [2020-10-13 11:09:11,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1301 states. [2020-10-13 11:09:11,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1301 states to 1301 states and 1437 transitions. [2020-10-13 11:09:11,553 INFO L78 Accepts]: Start accepts. Automaton has 1301 states and 1437 transitions. Word has length 60 [2020-10-13 11:09:11,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:09:11,554 INFO L479 AbstractCegarLoop]: Abstraction has 1301 states and 1437 transitions. [2020-10-13 11:09:11,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 11:09:11,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1301 states and 1437 transitions. [2020-10-13 11:09:11,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 11:09:11,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:09:11,561 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 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 11:09:11,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2020-10-13 11:09:11,561 INFO L427 AbstractCegarLoop]: === Iteration 113 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:09:11,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:09:11,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1570174919, now seen corresponding path program 106 times [2020-10-13 11:09:11,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:09:11,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298244921] [2020-10-13 11:09:11,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:09:11,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:11,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:12,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:12,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 11:09:12,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:12,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 529 [2020-10-13 11:09:12,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:12,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 11:09:12,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:09:12,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 11:09:12,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:12,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:09:12,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:12,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:12,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:12,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:09:12,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:12,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:09:12,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:12,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:09:12,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:12,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:09:12,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:12,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:09:12,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:12,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:12,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:12,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 11:09:12,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:12,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-13 11:09:12,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:12,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 11:09:12,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:12,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 11:09:12,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:12,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 11:09:12,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:12,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:12,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:12,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 11:09:12,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:12,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-13 11:09:12,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:12,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 11:09:12,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:12,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 11:09:12,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:13,523 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-13 11:09:13,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298244921] [2020-10-13 11:09:13,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:09:13,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 11:09:13,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207092897] [2020-10-13 11:09:13,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 11:09:13,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:09:13,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 11:09:13,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 11:09:13,525 INFO L87 Difference]: Start difference. First operand 1301 states and 1437 transitions. Second operand 36 states. [2020-10-13 11:09:15,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:09:15,598 INFO L93 Difference]: Finished difference Result 1307 states and 1442 transitions. [2020-10-13 11:09:15,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 11:09:15,599 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 60 [2020-10-13 11:09:15,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:09:15,605 INFO L225 Difference]: With dead ends: 1307 [2020-10-13 11:09:15,605 INFO L226 Difference]: Without dead ends: 1281 [2020-10-13 11:09:15,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=137, Invalid=2515, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 11:09:15,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2020-10-13 11:09:15,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1281. [2020-10-13 11:09:15,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1281 states. [2020-10-13 11:09:15,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1415 transitions. [2020-10-13 11:09:15,887 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1415 transitions. Word has length 60 [2020-10-13 11:09:15,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:09:15,887 INFO L479 AbstractCegarLoop]: Abstraction has 1281 states and 1415 transitions. [2020-10-13 11:09:15,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 11:09:15,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1415 transitions. [2020-10-13 11:09:15,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 11:09:15,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:09:15,895 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 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 11:09:15,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2020-10-13 11:09:15,895 INFO L427 AbstractCegarLoop]: === Iteration 114 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:09:15,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:09:15,895 INFO L82 PathProgramCache]: Analyzing trace with hash 699132921, now seen corresponding path program 107 times [2020-10-13 11:09:15,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:09:15,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854816561] [2020-10-13 11:09:15,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:09:15,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:15,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:16,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:16,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 11:09:16,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:16,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 482 [2020-10-13 11:09:16,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:16,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 11:09:16,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:09:16,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 11:09:16,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:16,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:09:16,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:16,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:16,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:16,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:09:16,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:16,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:09:16,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:16,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:09:16,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:16,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:09:16,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:16,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:09:16,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:16,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:16,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:16,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 11:09:16,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:16,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-13 11:09:16,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:16,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 11:09:16,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:16,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 11:09:16,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:16,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 11:09:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:16,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:16,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:16,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 11:09:16,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:16,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-13 11:09:16,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:16,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 11:09:16,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:16,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 11:09:16,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:17,668 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-13 11:09:17,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854816561] [2020-10-13 11:09:17,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:09:17,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 11:09:17,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939811413] [2020-10-13 11:09:17,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 11:09:17,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:09:17,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 11:09:17,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 11:09:17,669 INFO L87 Difference]: Start difference. First operand 1281 states and 1415 transitions. Second operand 34 states. [2020-10-13 11:09:19,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:09:19,493 INFO L93 Difference]: Finished difference Result 1287 states and 1420 transitions. [2020-10-13 11:09:19,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 11:09:19,494 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 60 [2020-10-13 11:09:19,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:09:19,499 INFO L225 Difference]: With dead ends: 1287 [2020-10-13 11:09:19,499 INFO L226 Difference]: Without dead ends: 1259 [2020-10-13 11:09:19,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=141, Invalid=2511, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 11:09:19,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2020-10-13 11:09:19,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1259. [2020-10-13 11:09:19,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1259 states. [2020-10-13 11:09:19,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1259 states to 1259 states and 1391 transitions. [2020-10-13 11:09:19,706 INFO L78 Accepts]: Start accepts. Automaton has 1259 states and 1391 transitions. Word has length 60 [2020-10-13 11:09:19,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:09:19,706 INFO L479 AbstractCegarLoop]: Abstraction has 1259 states and 1391 transitions. [2020-10-13 11:09:19,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 11:09:19,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1259 states and 1391 transitions. [2020-10-13 11:09:19,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 11:09:19,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:09:19,713 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1] [2020-10-13 11:09:19,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2020-10-13 11:09:19,713 INFO L427 AbstractCegarLoop]: === Iteration 115 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:09:19,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:09:19,713 INFO L82 PathProgramCache]: Analyzing trace with hash 816269369, now seen corresponding path program 108 times [2020-10-13 11:09:19,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:09:19,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426073336] [2020-10-13 11:09:19,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:09:19,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:19,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:20,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:20,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 11:09:20,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:20,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 647 [2020-10-13 11:09:20,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:20,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 11:09:20,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:09:20,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 11:09:20,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:20,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:09:20,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:20,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:20,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:20,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:09:20,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:20,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:09:20,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:20,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:09:20,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:20,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:09:20,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:20,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:09:20,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:20,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:20,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:20,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 11:09:20,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:20,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-13 11:09:20,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:20,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 11:09:20,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:20,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 11:09:20,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:20,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 11:09:20,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:20,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:20,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:20,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 11:09:20,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:20,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-13 11:09:20,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:20,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 11:09:20,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:20,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 11:09:20,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:21,538 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-13 11:09:21,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426073336] [2020-10-13 11:09:21,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:09:21,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 11:09:21,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004706083] [2020-10-13 11:09:21,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 11:09:21,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:09:21,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 11:09:21,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2020-10-13 11:09:21,539 INFO L87 Difference]: Start difference. First operand 1259 states and 1391 transitions. Second operand 32 states. [2020-10-13 11:09:23,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:09:23,233 INFO L93 Difference]: Finished difference Result 1265 states and 1396 transitions. [2020-10-13 11:09:23,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 11:09:23,234 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 60 [2020-10-13 11:09:23,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:09:23,243 INFO L225 Difference]: With dead ends: 1265 [2020-10-13 11:09:23,243 INFO L226 Difference]: Without dead ends: 1235 [2020-10-13 11:09:23,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=145, Invalid=2507, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 11:09:23,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2020-10-13 11:09:23,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 1235. [2020-10-13 11:09:23,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1235 states. [2020-10-13 11:09:23,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1235 states to 1235 states and 1365 transitions. [2020-10-13 11:09:23,443 INFO L78 Accepts]: Start accepts. Automaton has 1235 states and 1365 transitions. Word has length 60 [2020-10-13 11:09:23,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:09:23,444 INFO L479 AbstractCegarLoop]: Abstraction has 1235 states and 1365 transitions. [2020-10-13 11:09:23,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 11:09:23,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1235 states and 1365 transitions. [2020-10-13 11:09:23,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 11:09:23,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:09:23,450 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:09:23,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2020-10-13 11:09:23,450 INFO L427 AbstractCegarLoop]: === Iteration 116 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:09:23,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:09:23,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1143165959, now seen corresponding path program 109 times [2020-10-13 11:09:23,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:09:23,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69954275] [2020-10-13 11:09:23,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:09:23,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:23,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:23,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:23,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 11:09:23,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:23,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 423 [2020-10-13 11:09:23,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:23,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 11:09:23,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:09:23,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 11:09:23,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:23,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:09:23,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:23,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:23,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:23,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:09:23,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:23,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:09:23,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:23,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:09:23,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:23,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:09:23,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:23,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:09:23,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:23,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:24,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:24,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 11:09:24,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:24,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-13 11:09:24,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:24,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 11:09:24,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:24,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 11:09:24,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:24,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 11:09:24,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:24,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:24,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:24,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 11:09:24,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:24,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-13 11:09:24,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:24,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 11:09:24,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:24,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 11:09:24,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:24,986 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-13 11:09:24,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69954275] [2020-10-13 11:09:24,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:09:24,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 11:09:24,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618667838] [2020-10-13 11:09:24,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 11:09:24,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:09:24,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 11:09:24,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-10-13 11:09:24,987 INFO L87 Difference]: Start difference. First operand 1235 states and 1365 transitions. Second operand 30 states. [2020-10-13 11:09:26,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:09:26,606 INFO L93 Difference]: Finished difference Result 1253 states and 1386 transitions. [2020-10-13 11:09:26,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 11:09:26,607 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 60 [2020-10-13 11:09:26,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:09:26,615 INFO L225 Difference]: With dead ends: 1253 [2020-10-13 11:09:26,615 INFO L226 Difference]: Without dead ends: 1247 [2020-10-13 11:09:26,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=149, Invalid=2503, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 11:09:26,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2020-10-13 11:09:26,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1245. [2020-10-13 11:09:26,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1245 states. [2020-10-13 11:09:26,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 1378 transitions. [2020-10-13 11:09:26,817 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 1378 transitions. Word has length 60 [2020-10-13 11:09:26,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:09:26,817 INFO L479 AbstractCegarLoop]: Abstraction has 1245 states and 1378 transitions. [2020-10-13 11:09:26,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 11:09:26,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 1378 transitions. [2020-10-13 11:09:26,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 11:09:26,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:09:26,824 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:09:26,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2020-10-13 11:09:26,824 INFO L427 AbstractCegarLoop]: === Iteration 117 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:09:26,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:09:26,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1938742904, now seen corresponding path program 110 times [2020-10-13 11:09:26,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:09:26,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020535856] [2020-10-13 11:09:26,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:09:26,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:26,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:27,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:27,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 11:09:27,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:27,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 514 [2020-10-13 11:09:27,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:27,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 11:09:27,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:09:27,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 11:09:27,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:27,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:09:27,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:27,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:27,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:27,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:09:27,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:27,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:09:27,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:27,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:09:27,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:27,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:09:27,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:27,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:09:27,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:27,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:27,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:27,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 11:09:27,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:27,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-13 11:09:27,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:27,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 11:09:27,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:27,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 11:09:27,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:27,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 11:09:27,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:27,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:27,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:27,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 11:09:27,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:27,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-13 11:09:27,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:27,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 11:09:27,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:09:27,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 11:09:27,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:28,471 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 11:09:28,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020535856] [2020-10-13 11:09:28,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:09:28,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 11:09:28,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481299656] [2020-10-13 11:09:28,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 11:09:28,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:09:28,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 11:09:28,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 11:09:28,473 INFO L87 Difference]: Start difference. First operand 1245 states and 1378 transitions. Second operand 33 states. [2020-10-13 11:09:31,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:09:31,021 INFO L93 Difference]: Finished difference Result 1391 states and 1549 transitions. [2020-10-13 11:09:31,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 11:09:31,022 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 61 [2020-10-13 11:09:31,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:09:31,036 INFO L225 Difference]: With dead ends: 1391 [2020-10-13 11:09:31,036 INFO L226 Difference]: Without dead ends: 1377 [2020-10-13 11:09:31,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=71, Invalid=1119, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 11:09:31,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2020-10-13 11:09:31,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 1368. [2020-10-13 11:09:31,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1368 states. [2020-10-13 11:09:31,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 1518 transitions. [2020-10-13 11:09:31,271 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 1518 transitions. Word has length 61 [2020-10-13 11:09:31,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:09:31,271 INFO L479 AbstractCegarLoop]: Abstraction has 1368 states and 1518 transitions. [2020-10-13 11:09:31,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 11:09:31,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 1518 transitions. [2020-10-13 11:09:31,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 11:09:31,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:09:31,280 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:09:31,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2020-10-13 11:09:31,280 INFO L427 AbstractCegarLoop]: === Iteration 118 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:09:31,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:09:31,280 INFO L82 PathProgramCache]: Analyzing trace with hash -88166465, now seen corresponding path program 111 times [2020-10-13 11:09:31,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:09:31,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565208051] [2020-10-13 11:09:31,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:09:31,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:31,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:31,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:31,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 11:09:31,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:31,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 523 [2020-10-13 11:09:31,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:31,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 11:09:31,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:09:31,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 11:09:31,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:31,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:09:31,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:31,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:31,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:31,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:09:31,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:31,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:09:31,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:31,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:09:31,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:31,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:09:31,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:31,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:09:31,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:31,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:31,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:31,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 11:09:31,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:31,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-13 11:09:31,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:31,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 11:09:31,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:31,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 11:09:31,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:32,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-13 11:09:32,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:32,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:32,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:32,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 11:09:32,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:32,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-13 11:09:32,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:32,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 11:09:32,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:09:32,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 11:09:32,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:33,067 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 11:09:33,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565208051] [2020-10-13 11:09:33,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:09:33,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 11:09:33,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495032611] [2020-10-13 11:09:33,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 11:09:33,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:09:33,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 11:09:33,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 11:09:33,068 INFO L87 Difference]: Start difference. First operand 1368 states and 1518 transitions. Second operand 33 states. [2020-10-13 11:09:35,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:09:35,803 INFO L93 Difference]: Finished difference Result 1383 states and 1533 transitions. [2020-10-13 11:09:35,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 11:09:35,804 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 61 [2020-10-13 11:09:35,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:09:35,812 INFO L225 Difference]: With dead ends: 1383 [2020-10-13 11:09:35,812 INFO L226 Difference]: Without dead ends: 1371 [2020-10-13 11:09:35,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 11:09:35,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2020-10-13 11:09:36,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1369. [2020-10-13 11:09:36,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1369 states. [2020-10-13 11:09:36,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 1513 transitions. [2020-10-13 11:09:36,129 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 1513 transitions. Word has length 61 [2020-10-13 11:09:36,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:09:36,129 INFO L479 AbstractCegarLoop]: Abstraction has 1369 states and 1513 transitions. [2020-10-13 11:09:36,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 11:09:36,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 1513 transitions. [2020-10-13 11:09:36,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 11:09:36,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:09:36,138 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:09:36,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2020-10-13 11:09:36,138 INFO L427 AbstractCegarLoop]: === Iteration 119 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:09:36,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:09:36,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1060042018, now seen corresponding path program 112 times [2020-10-13 11:09:36,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:09:36,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505026270] [2020-10-13 11:09:36,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:09:36,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:36,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:36,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:36,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 11:09:36,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:36,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 280 [2020-10-13 11:09:36,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:36,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 11:09:36,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:09:36,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 11:09:36,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:36,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:09:36,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:36,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:36,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:36,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:09:36,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:36,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:09:36,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:36,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:09:36,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:36,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:09:36,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:36,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 11:09:36,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:36,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:36,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:36,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 11:09:36,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:36,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-13 11:09:36,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:36,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 11:09:36,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:09:36,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 11:09:36,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:36,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-13 11:09:36,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:36,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:36,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:36,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 11:09:36,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:36,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 11:09:36,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:36,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:09:36,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 11:09:36,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:09:36,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:36,721 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-10-13 11:09:36,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505026270] [2020-10-13 11:09:36,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:09:36,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 11:09:36,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630162846] [2020-10-13 11:09:36,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 11:09:36,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:09:36,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 11:09:36,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-10-13 11:09:36,722 INFO L87 Difference]: Start difference. First operand 1369 states and 1513 transitions. Second operand 18 states.