/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/array-tiling/mbpr2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 05:20:29,378 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 05:20:29,381 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 05:20:29,427 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 05:20:29,427 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 05:20:29,439 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 05:20:29,442 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 05:20:29,444 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 05:20:29,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 05:20:29,447 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 05:20:29,450 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 05:20:29,452 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 05:20:29,453 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 05:20:29,457 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 05:20:29,458 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 05:20:29,462 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 05:20:29,463 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 05:20:29,464 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 05:20:29,466 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 05:20:29,473 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 05:20:29,475 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 05:20:29,477 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 05:20:29,480 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 05:20:29,481 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 05:20:29,484 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 05:20:29,485 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 05:20:29,485 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 05:20:29,488 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 05:20:29,489 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 05:20:29,491 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 05:20:29,491 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 05:20:29,492 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 05:20:29,493 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 05:20:29,493 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 05:20:29,494 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 05:20:29,495 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 05:20:29,496 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 05:20:29,496 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 05:20:29,496 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 05:20:29,497 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 05:20:29,499 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 05:20:29,499 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 05:20:29,546 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 05:20:29,547 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 05:20:29,548 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 05:20:29,549 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 05:20:29,549 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 05:20:29,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 05:20:29,550 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 05:20:29,550 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 05:20:29,550 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 05:20:29,550 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 05:20:29,551 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 05:20:29,552 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 05:20:29,552 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 05:20:29,552 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 05:20:29,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 05:20:29,553 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 05:20:29,553 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 05:20:29,553 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 05:20:29,553 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 05:20:29,553 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 05:20:29,554 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 05:20:29,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:20:29,554 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 05:20:29,554 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 05:20:29,554 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 05:20:29,555 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 05:20:29,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 05:20:29,555 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 05:20:29,555 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 05:20:29,555 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 05:20:29,847 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 05:20:29,866 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 05:20:29,870 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 05:20:29,872 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 05:20:29,873 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 05:20:29,874 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/mbpr2.c [2020-10-13 05:20:29,954 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/95fdfe35f/1656259b41cc4960a03b4fda65a2bcfb/FLAGd2b1626a4 [2020-10-13 05:20:30,445 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 05:20:30,446 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-tiling/mbpr2.c [2020-10-13 05:20:30,462 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/95fdfe35f/1656259b41cc4960a03b4fda65a2bcfb/FLAGd2b1626a4 [2020-10-13 05:20:30,802 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/95fdfe35f/1656259b41cc4960a03b4fda65a2bcfb [2020-10-13 05:20:30,811 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 05:20:30,813 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 05:20:30,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 05:20:30,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 05:20:30,816 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 05:20:30,817 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:20:30" (1/1) ... [2020-10-13 05:20:30,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78a0aa91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:30, skipping insertion in model container [2020-10-13 05:20:30,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:20:30" (1/1) ... [2020-10-13 05:20:30,828 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 05:20:30,846 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 05:20:31,029 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:20:31,033 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 05:20:31,062 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:20:31,083 INFO L208 MainTranslator]: Completed translation [2020-10-13 05:20:31,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:31 WrapperNode [2020-10-13 05:20:31,084 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 05:20:31,085 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 05:20:31,085 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 05:20:31,085 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 05:20:31,170 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:31" (1/1) ... [2020-10-13 05:20:31,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:31" (1/1) ... [2020-10-13 05:20:31,178 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:31" (1/1) ... [2020-10-13 05:20:31,179 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:31" (1/1) ... [2020-10-13 05:20:31,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:31" (1/1) ... [2020-10-13 05:20:31,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:31" (1/1) ... [2020-10-13 05:20:31,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:31" (1/1) ... [2020-10-13 05:20:31,201 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 05:20:31,201 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 05:20:31,201 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 05:20:31,202 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 05:20:31,203 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:31" (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 05:20:31,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 05:20:31,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 05:20:31,265 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 05:20:31,266 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 05:20:31,266 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 05:20:31,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 05:20:31,266 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 05:20:31,266 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 05:20:31,267 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 05:20:31,267 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 05:20:31,267 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 05:20:31,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 05:20:31,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 05:20:31,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 05:20:31,268 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 05:20:31,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 05:20:31,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 05:20:31,605 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 05:20:31,606 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 05:20:31,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:20:31 BoogieIcfgContainer [2020-10-13 05:20:31,610 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 05:20:31,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 05:20:31,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 05:20:31,629 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 05:20:31,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:20:30" (1/3) ... [2020-10-13 05:20:31,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48511405 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:20:31, skipping insertion in model container [2020-10-13 05:20:31,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:31" (2/3) ... [2020-10-13 05:20:31,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48511405 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:20:31, skipping insertion in model container [2020-10-13 05:20:31,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:20:31" (3/3) ... [2020-10-13 05:20:31,633 INFO L109 eAbstractionObserver]: Analyzing ICFG mbpr2.c [2020-10-13 05:20:31,658 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 05:20:31,667 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 05:20:31,680 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 05:20:31,705 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 05:20:31,705 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 05:20:31,705 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 05:20:31,705 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 05:20:31,706 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 05:20:31,706 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 05:20:31,706 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 05:20:31,706 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 05:20:31,728 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-10-13 05:20:31,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 05:20:31,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:31,737 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] [2020-10-13 05:20:31,738 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:31,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:31,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1980951562, now seen corresponding path program 1 times [2020-10-13 05:20:31,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:31,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712519316] [2020-10-13 05:20:31,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:31,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:31,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:31,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:32,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:32,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:32,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:32,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:32,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 05:20:32,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:20:32,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1006 [2020-10-13 05:20:32,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:32,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:32,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 05:20:32,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:32,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 05:20:32,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:32,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:32,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:32,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:32,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:32,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:32,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:20:32,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:32,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:32,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:32,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:32,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:20:32,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:20:32,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:32,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:32,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:32,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:20:32,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:32,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 05:20:32,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:32,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:32,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 05:20:32,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:32,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:20:32,998 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 05:20:32,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712519316] [2020-10-13 05:20:33,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:20:33,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 05:20:33,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985483464] [2020-10-13 05:20:33,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 05:20:33,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:33,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 05:20:33,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:20:33,039 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-10-13 05:20:33,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:33,266 INFO L93 Difference]: Finished difference Result 71 states and 93 transitions. [2020-10-13 05:20:33,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 05:20:33,269 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-10-13 05:20:33,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:33,287 INFO L225 Difference]: With dead ends: 71 [2020-10-13 05:20:33,288 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 05:20:33,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:20:33,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 05:20:33,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-13 05:20:33,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 05:20:33,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-10-13 05:20:33,363 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 24 [2020-10-13 05:20:33,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:33,364 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-10-13 05:20:33,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 05:20:33,364 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-10-13 05:20:33,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 05:20:33,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:33,368 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] [2020-10-13 05:20:33,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 05:20:33,369 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:33,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:33,370 INFO L82 PathProgramCache]: Analyzing trace with hash -437393247, now seen corresponding path program 1 times [2020-10-13 05:20:33,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:33,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911365545] [2020-10-13 05:20:33,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:33,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:33,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:33,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:33,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:33,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:33,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:33,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:34,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:34,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:34,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 05:20:34,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 05:20:34,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1401 [2020-10-13 05:20:34,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:34,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 05:20:34,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 05:20:34,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:20:34,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-13 05:20:34,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:34,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:34,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:34,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:34,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:34,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:34,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 05:20:34,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:34,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:34,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:34,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:34,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:34,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:20:34,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:34,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:34,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:34,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:20:34,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:34,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:20:34,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:34,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:34,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:34,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:34,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-13 05:20:34,950 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 05:20:34,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911365545] [2020-10-13 05:20:34,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:20:34,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 05:20:34,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075837549] [2020-10-13 05:20:34,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 05:20:34,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:34,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 05:20:34,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:20:34,959 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 6 states. [2020-10-13 05:20:35,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:35,175 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2020-10-13 05:20:35,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 05:20:35,176 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-13 05:20:35,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:35,178 INFO L225 Difference]: With dead ends: 43 [2020-10-13 05:20:35,179 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 05:20:35,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:20:35,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 05:20:35,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-13 05:20:35,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 05:20:35,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-10-13 05:20:35,193 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 24 [2020-10-13 05:20:35,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:35,193 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-10-13 05:20:35,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 05:20:35,194 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-10-13 05:20:35,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 05:20:35,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:35,195 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] [2020-10-13 05:20:35,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 05:20:35,196 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:35,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:35,196 INFO L82 PathProgramCache]: Analyzing trace with hash -435546205, now seen corresponding path program 1 times [2020-10-13 05:20:35,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:35,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405881759] [2020-10-13 05:20:35,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:35,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:35,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:35,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:35,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:35,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:35,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:35,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:36,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:36,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 05:20:36,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:20:36,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 802 [2020-10-13 05:20:36,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:36,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 05:20:36,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:20:36,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 05:20:36,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:36,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:36,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:36,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:36,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:36,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:36,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:36,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:20:36,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:36,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:36,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:36,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:36,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:36,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:20:36,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:36,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:36,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:36,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:20:36,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:36,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 05:20:36,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:36,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:20:36,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:36,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:20:36,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:36,081 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 05:20:36,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405881759] [2020-10-13 05:20:36,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:20:36,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 05:20:36,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574134656] [2020-10-13 05:20:36,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 05:20:36,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:36,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 05:20:36,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:20:36,084 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 5 states. [2020-10-13 05:20:36,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:36,235 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2020-10-13 05:20:36,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 05:20:36,236 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-13 05:20:36,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:36,240 INFO L225 Difference]: With dead ends: 70 [2020-10-13 05:20:36,241 INFO L226 Difference]: Without dead ends: 48 [2020-10-13 05:20:36,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 05:20:36,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-13 05:20:36,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-10-13 05:20:36,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 05:20:36,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-10-13 05:20:36,255 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 24 [2020-10-13 05:20:36,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:36,256 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-10-13 05:20:36,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 05:20:36,256 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-10-13 05:20:36,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 05:20:36,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:36,258 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 05:20:36,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 05:20:36,258 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:36,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:36,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1502577645, now seen corresponding path program 1 times [2020-10-13 05:20:36,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:36,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662404947] [2020-10-13 05:20:36,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:36,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:36,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:36,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:36,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:36,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:36,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:37,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:37,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 05:20:37,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:20:37,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1209 [2020-10-13 05:20:37,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:37,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:20:37,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 05:20:37,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 05:20:37,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:20:38,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:38,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:38,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:38,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:38,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:38,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:38,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:20:38,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:38,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:38,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:38,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:38,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:38,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:20:38,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:38,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:38,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:38,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:20:38,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:38,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:20:38,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:38,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:38,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:38,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:38,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:38,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:20:38,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662404947] [2020-10-13 05:20:38,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:38,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 05:20:38,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121879542] [2020-10-13 05:20:38,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 05:20:38,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:38,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 05:20:38,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:20:38,102 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 13 states. [2020-10-13 05:20:38,816 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-10-13 05:20:38,961 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-10-13 05:20:39,152 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-10-13 05:20:39,336 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-13 05:20:39,664 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-10-13 05:20:39,882 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-10-13 05:20:40,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:40,205 INFO L93 Difference]: Finished difference Result 109 states and 134 transitions. [2020-10-13 05:20:40,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 05:20:40,206 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-13 05:20:40,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:40,208 INFO L225 Difference]: With dead ends: 109 [2020-10-13 05:20:40,208 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 05:20:40,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=166, Invalid=646, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:20:40,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 05:20:40,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 54. [2020-10-13 05:20:40,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 05:20:40,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2020-10-13 05:20:40,223 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 32 [2020-10-13 05:20:40,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:40,223 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2020-10-13 05:20:40,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 05:20:40,223 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2020-10-13 05:20:40,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 05:20:40,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:40,225 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 05:20:40,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 05:20:40,225 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:40,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:40,225 INFO L82 PathProgramCache]: Analyzing trace with hash -85770257, now seen corresponding path program 1 times [2020-10-13 05:20:40,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:40,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587176312] [2020-10-13 05:20:40,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:40,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:40,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:40,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:40,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:40,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:40,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:40,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:40,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:40,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 05:20:40,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:20:40,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 693 [2020-10-13 05:20:40,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:40,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:20:40,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:20:40,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 05:20:40,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:20:40,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:40,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:40,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:40,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:40,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:40,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:40,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:20:40,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:40,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:40,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:40,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:40,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:40,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:20:40,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:40,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:40,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:40,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:20:40,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:40,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:20:40,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:40,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:20:40,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:40,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:20:40,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:40,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:20:40,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587176312] [2020-10-13 05:20:40,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:20:40,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 05:20:40,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576567455] [2020-10-13 05:20:40,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 05:20:40,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:40,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 05:20:40,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:20:40,990 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand 4 states. [2020-10-13 05:20:41,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:41,105 INFO L93 Difference]: Finished difference Result 88 states and 103 transitions. [2020-10-13 05:20:41,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 05:20:41,106 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-13 05:20:41,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:41,107 INFO L225 Difference]: With dead ends: 88 [2020-10-13 05:20:41,107 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 05:20:41,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:20:41,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 05:20:41,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-13 05:20:41,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 05:20:41,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2020-10-13 05:20:41,118 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 32 [2020-10-13 05:20:41,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:41,118 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2020-10-13 05:20:41,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 05:20:41,119 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2020-10-13 05:20:41,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 05:20:41,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:41,120 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] [2020-10-13 05:20:41,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 05:20:41,121 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:41,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:41,122 INFO L82 PathProgramCache]: Analyzing trace with hash -51696686, now seen corresponding path program 2 times [2020-10-13 05:20:41,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:41,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089018813] [2020-10-13 05:20:41,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:41,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:41,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:41,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:41,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:41,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:42,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:42,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 05:20:42,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:20:42,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1173 [2020-10-13 05:20:42,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:42,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:20:42,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 05:20:42,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 05:20:42,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:42,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:42,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:42,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:42,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:42,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:42,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:42,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:20:42,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:42,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:42,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:42,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:42,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:20:42,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:20:42,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:42,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:42,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:42,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:20:42,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:42,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:20:42,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:42,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:42,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:42,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:42,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:20:42,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:20:42,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089018813] [2020-10-13 05:20:42,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:42,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:20:42,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974449809] [2020-10-13 05:20:42,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:20:42,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:42,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:20:42,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:20:42,405 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 8 states. [2020-10-13 05:20:42,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:42,765 INFO L93 Difference]: Finished difference Result 119 states and 140 transitions. [2020-10-13 05:20:42,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 05:20:42,766 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-13 05:20:42,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:42,767 INFO L225 Difference]: With dead ends: 119 [2020-10-13 05:20:42,767 INFO L226 Difference]: Without dead ends: 98 [2020-10-13 05:20:42,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:20:42,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-13 05:20:42,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 59. [2020-10-13 05:20:42,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 05:20:42,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2020-10-13 05:20:42,781 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 36 [2020-10-13 05:20:42,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:42,781 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2020-10-13 05:20:42,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:20:42,782 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2020-10-13 05:20:42,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 05:20:42,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:42,783 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, 1, 1] [2020-10-13 05:20:42,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 05:20:42,784 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:42,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:42,784 INFO L82 PathProgramCache]: Analyzing trace with hash 992893435, now seen corresponding path program 1 times [2020-10-13 05:20:42,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:42,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637479710] [2020-10-13 05:20:42,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:42,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:42,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:42,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:42,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:43,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:43,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 05:20:43,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:20:43,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 432 [2020-10-13 05:20:43,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:43,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:20:43,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:20:43,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 05:20:43,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:43,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:43,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:43,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:43,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:43,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:43,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:43,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:20:43,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:43,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:43,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:43,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:43,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:43,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:20:43,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:43,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:43,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:43,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:20:43,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:43,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:20:43,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:43,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:20:43,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:43,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:20:43,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:43,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 05:20:43,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:43,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:43,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:43,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:20:43,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:43,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:43,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:43,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:43,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:20:43,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:43,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:43,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 05:20:43,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637479710] [2020-10-13 05:20:43,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:20:43,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 05:20:43,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410471615] [2020-10-13 05:20:43,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 05:20:43,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:43,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 05:20:43,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:20:43,285 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand 4 states. [2020-10-13 05:20:43,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:43,365 INFO L93 Difference]: Finished difference Result 89 states and 101 transitions. [2020-10-13 05:20:43,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 05:20:43,366 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-10-13 05:20:43,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:43,367 INFO L225 Difference]: With dead ends: 89 [2020-10-13 05:20:43,367 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 05:20:43,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:20:43,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 05:20:43,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-13 05:20:43,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 05:20:43,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2020-10-13 05:20:43,377 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 41 [2020-10-13 05:20:43,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:43,378 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2020-10-13 05:20:43,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 05:20:43,378 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2020-10-13 05:20:43,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 05:20:43,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:43,379 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, 1, 1] [2020-10-13 05:20:43,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 05:20:43,380 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:43,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:43,380 INFO L82 PathProgramCache]: Analyzing trace with hash 175244985, now seen corresponding path program 1 times [2020-10-13 05:20:43,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:43,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759143514] [2020-10-13 05:20:43,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:43,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:43,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:43,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:43,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:43,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:43,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:45,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:45,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:45,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 05:20:45,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:20:45,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2119 [2020-10-13 05:20:45,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:45,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 05:20:45,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 05:20:45,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 05:20:45,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:45,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:45,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:45,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:45,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:45,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:45,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:45,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:45,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:45,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:45,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:45,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:45,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:45,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:20:45,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:45,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:45,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:45,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:20:45,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:45,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:20:45,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:45,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:45,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:45,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:45,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:45,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 05:20:45,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:45,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:45,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:45,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:20:45,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:45,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:20:45,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:45,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:20:45,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:45,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:20:45,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:45,654 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:20:45,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759143514] [2020-10-13 05:20:45,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:45,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 05:20:45,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322272403] [2020-10-13 05:20:45,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 05:20:45,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:45,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 05:20:45,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:20:45,657 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 11 states. [2020-10-13 05:20:46,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:46,126 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2020-10-13 05:20:46,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:20:46,127 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-10-13 05:20:46,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:46,128 INFO L225 Difference]: With dead ends: 79 [2020-10-13 05:20:46,128 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 05:20:46,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-10-13 05:20:46,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 05:20:46,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2020-10-13 05:20:46,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 05:20:46,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2020-10-13 05:20:46,144 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 41 [2020-10-13 05:20:46,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:46,144 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2020-10-13 05:20:46,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 05:20:46,144 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2020-10-13 05:20:46,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 05:20:46,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:46,147 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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] [2020-10-13 05:20:46,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 05:20:46,147 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:46,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:46,148 INFO L82 PathProgramCache]: Analyzing trace with hash 152223803, now seen corresponding path program 1 times [2020-10-13 05:20:46,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:46,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118711501] [2020-10-13 05:20:46,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:46,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:46,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:46,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:46,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:46,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:46,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:47,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:49,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:49,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 05:20:49,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:20:49,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3019 [2020-10-13 05:20:49,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:49,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 05:20:49,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 05:20:49,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 05:20:49,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 05:20:49,470 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 37 [2020-10-13 05:20:49,960 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 80 [2020-10-13 05:20:50,196 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 28 [2020-10-13 05:20:50,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:50,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:50,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:50,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:50,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:50,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:50,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:20:50,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:50,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:50,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:50,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:50,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:50,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:20:50,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:50,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:50,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:50,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:20:50,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:50,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:20:50,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:50,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:50,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:50,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:50,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:50,703 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:20:50,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118711501] [2020-10-13 05:20:50,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:50,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:20:50,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319003510] [2020-10-13 05:20:50,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:20:50,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:50,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:20:50,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:20:50,706 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand 16 states. [2020-10-13 05:20:51,501 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 70 [2020-10-13 05:20:51,825 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 58 [2020-10-13 05:20:52,255 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 82 [2020-10-13 05:20:52,838 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 63 [2020-10-13 05:20:53,483 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 58 [2020-10-13 05:20:53,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:53,906 INFO L93 Difference]: Finished difference Result 136 states and 162 transitions. [2020-10-13 05:20:53,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 05:20:53,907 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-13 05:20:53,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:53,908 INFO L225 Difference]: With dead ends: 136 [2020-10-13 05:20:53,909 INFO L226 Difference]: Without dead ends: 110 [2020-10-13 05:20:53,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2020-10-13 05:20:53,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-13 05:20:53,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2020-10-13 05:20:53,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 05:20:53,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2020-10-13 05:20:53,926 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 40 [2020-10-13 05:20:53,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:53,927 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2020-10-13 05:20:53,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:20:53,927 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2020-10-13 05:20:53,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 05:20:53,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:53,928 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:53,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 05:20:53,929 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:53,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:53,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1367017822, now seen corresponding path program 2 times [2020-10-13 05:20:53,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:53,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273322181] [2020-10-13 05:20:53,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:53,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:53,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:53,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:55,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:55,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 05:20:55,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:20:55,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1921 [2020-10-13 05:20:55,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:55,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:20:55,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 05:20:55,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 05:20:55,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:55,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:55,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:55,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:55,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:55,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:55,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:55,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:20:55,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:55,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:55,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:55,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:55,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:55,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:20:55,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:55,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:55,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:55,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:20:55,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:55,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:20:55,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:55,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:55,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:55,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:55,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:55,989 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:20:55,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273322181] [2020-10-13 05:20:55,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:55,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:20:55,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564062414] [2020-10-13 05:20:55,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:20:55,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:55,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:20:55,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:20:55,992 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand 10 states. [2020-10-13 05:20:56,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:56,483 INFO L93 Difference]: Finished difference Result 177 states and 207 transitions. [2020-10-13 05:20:56,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:20:56,484 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-10-13 05:20:56,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:56,490 INFO L225 Difference]: With dead ends: 177 [2020-10-13 05:20:56,490 INFO L226 Difference]: Without dead ends: 143 [2020-10-13 05:20:56,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:20:56,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-13 05:20:56,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 110. [2020-10-13 05:20:56,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-13 05:20:56,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 126 transitions. [2020-10-13 05:20:56,539 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 126 transitions. Word has length 44 [2020-10-13 05:20:56,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:56,541 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 126 transitions. [2020-10-13 05:20:56,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:20:56,541 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 126 transitions. [2020-10-13 05:20:56,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 05:20:56,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:56,548 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-10-13 05:20:56,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 05:20:56,549 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:56,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:56,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1585724591, now seen corresponding path program 2 times [2020-10-13 05:20:56,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:56,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16867427] [2020-10-13 05:20:56,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:56,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:56,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:56,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:56,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:56,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:57,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:58,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:58,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:00,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:01,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:01,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 05:21:01,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:21:01,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:21:01,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:01,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 05:21:01,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:21:01,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 05:21:01,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:02,019 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2020-10-13 05:21:02,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:02,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:02,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:02,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:02,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:02,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:02,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:21:02,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:02,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:02,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:02,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:02,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:21:02,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:21:02,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:02,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:02,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:02,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:21:02,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:02,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:21:02,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:02,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:21:02,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:02,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:21:02,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:02,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 05:21:02,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:02,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:02,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:02,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:21:02,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:02,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:21:02,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:02,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:21:02,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:02,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:21:02,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:02,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-13 05:21:02,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:02,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:02,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:02,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:21:02,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:02,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:02,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:02,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:02,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:21:02,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:02,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:02,123 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 05:21:02,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16867427] [2020-10-13 05:21:02,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:02,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 05:21:02,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756776247] [2020-10-13 05:21:02,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 05:21:02,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:02,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 05:21:02,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:21:02,125 INFO L87 Difference]: Start difference. First operand 110 states and 126 transitions. Second operand 13 states. [2020-10-13 05:21:02,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:02,895 INFO L93 Difference]: Finished difference Result 154 states and 179 transitions. [2020-10-13 05:21:02,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 05:21:02,897 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2020-10-13 05:21:02,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:02,898 INFO L225 Difference]: With dead ends: 154 [2020-10-13 05:21:02,899 INFO L226 Difference]: Without dead ends: 138 [2020-10-13 05:21:02,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:21:02,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-13 05:21:02,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 122. [2020-10-13 05:21:02,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-13 05:21:02,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 139 transitions. [2020-10-13 05:21:02,929 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 139 transitions. Word has length 50 [2020-10-13 05:21:02,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:02,929 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 139 transitions. [2020-10-13 05:21:02,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 05:21:02,930 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 139 transitions. [2020-10-13 05:21:02,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 05:21:02,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:02,930 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-10-13 05:21:02,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 05:21:02,931 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:02,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:02,931 INFO L82 PathProgramCache]: Analyzing trace with hash 574607341, now seen corresponding path program 3 times [2020-10-13 05:21:02,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:02,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744022778] [2020-10-13 05:21:02,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:02,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:02,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:02,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:03,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:03,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:04,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:04,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 05:21:04,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:21:04,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1663 [2020-10-13 05:21:04,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:04,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:21:04,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 05:21:04,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 05:21:04,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:04,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:04,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:04,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:04,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:04,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:04,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:04,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:04,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:04,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:04,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:04,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:04,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:21:04,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:21:04,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:04,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:04,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:04,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:21:04,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:04,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 05:21:04,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:04,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 05:21:04,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:04,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:21:04,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:21:04,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 05:21:04,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:04,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:04,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:04,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:21:04,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:04,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:21:04,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:04,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:21:04,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:04,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:21:04,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:04,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-13 05:21:04,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:04,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:04,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:04,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:21:04,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:04,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:21:04,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:04,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:21:04,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:04,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:21:04,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:04,824 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 05:21:04,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744022778] [2020-10-13 05:21:04,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:04,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:21:04,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256039770] [2020-10-13 05:21:04,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:21:04,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:04,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:21:04,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:21:04,827 INFO L87 Difference]: Start difference. First operand 122 states and 139 transitions. Second operand 12 states. [2020-10-13 05:21:05,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:05,567 INFO L93 Difference]: Finished difference Result 156 states and 175 transitions. [2020-10-13 05:21:05,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 05:21:05,567 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2020-10-13 05:21:05,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:05,569 INFO L225 Difference]: With dead ends: 156 [2020-10-13 05:21:05,569 INFO L226 Difference]: Without dead ends: 114 [2020-10-13 05:21:05,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:21:05,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-13 05:21:05,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 108. [2020-10-13 05:21:05,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-13 05:21:05,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 121 transitions. [2020-10-13 05:21:05,589 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 121 transitions. Word has length 50 [2020-10-13 05:21:05,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:05,590 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 121 transitions. [2020-10-13 05:21:05,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:21:05,590 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 121 transitions. [2020-10-13 05:21:05,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 05:21:05,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:05,591 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:05,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 05:21:05,591 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:05,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:05,592 INFO L82 PathProgramCache]: Analyzing trace with hash -734913529, now seen corresponding path program 3 times [2020-10-13 05:21:05,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:05,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213134065] [2020-10-13 05:21:05,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:05,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:05,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:05,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:05,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:06,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:06,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:06,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:07,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:08,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:08,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 05:21:08,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 05:21:08,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3310 [2020-10-13 05:21:08,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:08,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 05:21:08,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 05:21:08,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 05:21:08,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:09,483 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 59 [2020-10-13 05:21:09,810 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 57 [2020-10-13 05:21:10,199 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2020-10-13 05:21:10,344 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2020-10-13 05:21:10,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:10,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:10,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:10,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:10,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:10,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:10,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:10,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:10,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:10,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:10,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:10,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:10,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:21:10,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:10,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:10,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:10,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:21:10,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:10,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:21:10,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:10,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:10,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:10,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:10,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:11,005 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:21:11,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213134065] [2020-10-13 05:21:11,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:11,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 05:21:11,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582719005] [2020-10-13 05:21:11,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 05:21:11,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:11,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 05:21:11,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2020-10-13 05:21:11,012 INFO L87 Difference]: Start difference. First operand 108 states and 121 transitions. Second operand 19 states. [2020-10-13 05:21:11,997 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2020-10-13 05:21:12,332 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2020-10-13 05:21:12,670 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-10-13 05:21:13,041 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-10-13 05:21:13,407 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 47 [2020-10-13 05:21:13,748 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2020-10-13 05:21:14,075 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2020-10-13 05:21:14,480 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-10-13 05:21:14,785 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-10-13 05:21:15,054 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2020-10-13 05:21:15,211 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2020-10-13 05:21:15,394 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2020-10-13 05:21:15,693 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-10-13 05:21:16,008 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2020-10-13 05:21:16,270 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2020-10-13 05:21:17,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:17,061 INFO L93 Difference]: Finished difference Result 173 states and 203 transitions. [2020-10-13 05:21:17,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 05:21:17,061 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2020-10-13 05:21:17,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:17,063 INFO L225 Difference]: With dead ends: 173 [2020-10-13 05:21:17,063 INFO L226 Difference]: Without dead ends: 147 [2020-10-13 05:21:17,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 9 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=289, Invalid=1781, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 05:21:17,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-13 05:21:17,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 115. [2020-10-13 05:21:17,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-13 05:21:17,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 129 transitions. [2020-10-13 05:21:17,085 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 129 transitions. Word has length 48 [2020-10-13 05:21:17,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:17,085 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 129 transitions. [2020-10-13 05:21:17,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 05:21:17,086 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 129 transitions. [2020-10-13 05:21:17,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 05:21:17,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:17,086 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:17,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 05:21:17,087 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:17,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:17,087 INFO L82 PathProgramCache]: Analyzing trace with hash -541488018, now seen corresponding path program 4 times [2020-10-13 05:21:17,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:17,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600771858] [2020-10-13 05:21:17,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:17,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:17,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:17,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:20,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:20,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 05:21:20,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:21:20,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3318 [2020-10-13 05:21:20,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:20,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:21:20,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 05:21:20,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 05:21:20,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:20,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:20,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:20,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:20,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:20,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:20,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:20,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:20,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:20,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:20,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:20,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:20,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:20,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:21:20,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:20,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:20,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:20,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:21:20,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:20,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:20,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:20,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:20,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:20,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:20,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:20,597 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 28 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:21:20,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600771858] [2020-10-13 05:21:20,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:20,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:21:20,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676187868] [2020-10-13 05:21:20,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:21:20,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:20,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:21:20,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:21:20,600 INFO L87 Difference]: Start difference. First operand 115 states and 129 transitions. Second operand 12 states. [2020-10-13 05:21:21,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:21,211 INFO L93 Difference]: Finished difference Result 246 states and 293 transitions. [2020-10-13 05:21:21,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 05:21:21,212 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2020-10-13 05:21:21,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:21,215 INFO L225 Difference]: With dead ends: 246 [2020-10-13 05:21:21,215 INFO L226 Difference]: Without dead ends: 212 [2020-10-13 05:21:21,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:21:21,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-13 05:21:21,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 126. [2020-10-13 05:21:21,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-13 05:21:21,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 142 transitions. [2020-10-13 05:21:21,240 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 142 transitions. Word has length 52 [2020-10-13 05:21:21,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:21,241 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 142 transitions. [2020-10-13 05:21:21,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:21:21,241 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 142 transitions. [2020-10-13 05:21:21,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 05:21:21,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:21,242 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-13 05:21:21,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 05:21:21,242 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:21,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:21,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1720027013, now seen corresponding path program 4 times [2020-10-13 05:21:21,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:21,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928485308] [2020-10-13 05:21:21,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:21,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:21,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:21,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:21,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:21,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:21,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:21,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:22,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:22,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:22,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:22,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:22,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:26,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:26,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 05:21:26,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 05:21:26,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 05:21:26,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:26,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 05:21:26,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 05:21:26,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 05:21:26,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:26,506 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-10-13 05:21:27,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:27,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:27,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:27,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:27,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:27,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:27,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:27,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:27,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:27,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:27,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:27,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:27,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:21:27,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:27,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:27,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:27,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:21:27,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:27,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:27,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:27,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:27,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:27,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:27,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:27,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 05:21:27,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:27,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:27,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:27,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:21:27,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:27,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:21:27,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:27,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:21:27,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:27,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:21:27,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:27,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-13 05:21:27,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:27,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:27,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:27,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:21:27,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:27,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:21:27,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:27,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:21:27,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:27,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:21:27,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:27,047 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 05:21:27,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928485308] [2020-10-13 05:21:27,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:27,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:21:27,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623024866] [2020-10-13 05:21:27,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:21:27,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:27,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:21:27,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:21:27,050 INFO L87 Difference]: Start difference. First operand 126 states and 142 transitions. Second operand 16 states. [2020-10-13 05:21:27,465 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-10-13 05:21:27,881 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2020-10-13 05:21:28,097 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-10-13 05:21:28,347 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-10-13 05:21:28,734 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2020-10-13 05:21:29,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:29,536 INFO L93 Difference]: Finished difference Result 174 states and 200 transitions. [2020-10-13 05:21:29,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 05:21:29,537 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2020-10-13 05:21:29,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:29,539 INFO L225 Difference]: With dead ends: 174 [2020-10-13 05:21:29,539 INFO L226 Difference]: Without dead ends: 158 [2020-10-13 05:21:29,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=197, Invalid=993, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 05:21:29,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-13 05:21:29,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 144. [2020-10-13 05:21:29,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-13 05:21:29,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 164 transitions. [2020-10-13 05:21:29,565 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 164 transitions. Word has length 58 [2020-10-13 05:21:29,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:29,565 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 164 transitions. [2020-10-13 05:21:29,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:21:29,566 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 164 transitions. [2020-10-13 05:21:29,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 05:21:29,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:29,567 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-13 05:21:29,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 05:21:29,567 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:29,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:29,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1802599635, now seen corresponding path program 5 times [2020-10-13 05:21:29,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:29,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506797988] [2020-10-13 05:21:29,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:29,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:29,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:29,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:30,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:30,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:31,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:31,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:32,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:32,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:34,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:34,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 05:21:34,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:21:34,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:21:34,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:34,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 05:21:34,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 05:21:34,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 05:21:34,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:35,051 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-13 05:21:35,258 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-10-13 05:21:35,975 WARN L193 SmtUtils]: Spent 639.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 74 [2020-10-13 05:21:36,159 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2020-10-13 05:21:36,301 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 29 [2020-10-13 05:21:36,442 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 29 [2020-10-13 05:21:37,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:37,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:37,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:37,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:37,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:37,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:37,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:21:37,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:37,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:37,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:37,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:37,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:37,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:21:37,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:37,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:37,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:37,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:21:37,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:37,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:37,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:37,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:37,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:37,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:37,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:37,300 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:21:37,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506797988] [2020-10-13 05:21:37,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:37,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 05:21:37,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615271048] [2020-10-13 05:21:37,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 05:21:37,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:37,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 05:21:37,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:21:37,303 INFO L87 Difference]: Start difference. First operand 144 states and 164 transitions. Second operand 22 states. [2020-10-13 05:21:38,271 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2020-10-13 05:21:38,576 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 60 [2020-10-13 05:21:38,846 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 57 [2020-10-13 05:21:39,354 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 62 [2020-10-13 05:21:39,960 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2020-10-13 05:21:40,574 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 60 [2020-10-13 05:21:41,327 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 60 [2020-10-13 05:21:41,876 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 55 [2020-10-13 05:21:42,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:42,496 INFO L93 Difference]: Finished difference Result 225 states and 266 transitions. [2020-10-13 05:21:42,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 05:21:42,497 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 56 [2020-10-13 05:21:42,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:42,498 INFO L225 Difference]: With dead ends: 225 [2020-10-13 05:21:42,498 INFO L226 Difference]: Without dead ends: 199 [2020-10-13 05:21:42,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 12 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=323, Invalid=1933, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 05:21:42,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-13 05:21:42,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 151. [2020-10-13 05:21:42,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-13 05:21:42,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 172 transitions. [2020-10-13 05:21:42,527 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 172 transitions. Word has length 56 [2020-10-13 05:21:42,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:42,527 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 172 transitions. [2020-10-13 05:21:42,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 05:21:42,528 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 172 transitions. [2020-10-13 05:21:42,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 05:21:42,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:42,529 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-10-13 05:21:42,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 05:21:42,529 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:42,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:42,530 INFO L82 PathProgramCache]: Analyzing trace with hash 327395130, now seen corresponding path program 6 times [2020-10-13 05:21:42,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:42,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115088809] [2020-10-13 05:21:42,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:42,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:42,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:42,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:44,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:44,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 05:21:44,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:21:44,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2011 [2020-10-13 05:21:44,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:44,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:21:44,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 05:21:44,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 05:21:44,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:44,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:44,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:44,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:44,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:44,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:44,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:44,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:44,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:44,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:44,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:44,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:44,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:44,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:21:44,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:44,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:44,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:44,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:21:44,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:44,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:44,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:44,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:44,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:44,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:44,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:44,808 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 45 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:21:44,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115088809] [2020-10-13 05:21:44,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:44,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:21:44,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059978771] [2020-10-13 05:21:44,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:21:44,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:44,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:21:44,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:21:44,811 INFO L87 Difference]: Start difference. First operand 151 states and 172 transitions. Second operand 14 states. [2020-10-13 05:21:46,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:46,354 INFO L93 Difference]: Finished difference Result 311 states and 379 transitions. [2020-10-13 05:21:46,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 05:21:46,354 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 60 [2020-10-13 05:21:46,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:46,357 INFO L225 Difference]: With dead ends: 311 [2020-10-13 05:21:46,358 INFO L226 Difference]: Without dead ends: 277 [2020-10-13 05:21:46,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 05:21:46,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-13 05:21:46,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 197. [2020-10-13 05:21:46,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-13 05:21:46,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 225 transitions. [2020-10-13 05:21:46,410 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 225 transitions. Word has length 60 [2020-10-13 05:21:46,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:46,410 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 225 transitions. [2020-10-13 05:21:46,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:21:46,410 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 225 transitions. [2020-10-13 05:21:46,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 05:21:46,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:46,412 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2020-10-13 05:21:46,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 05:21:46,412 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:46,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:46,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1022188243, now seen corresponding path program 5 times [2020-10-13 05:21:46,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:46,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730159628] [2020-10-13 05:21:46,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:46,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:46,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:46,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:46,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:46,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:46,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:46,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:46,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:47,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:47,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:47,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:48,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:49,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:49,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:50,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:50,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:51,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:51,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 05:21:51,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 05:21:51,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:21:51,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:51,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:21:51,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:21:51,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 05:21:51,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:51,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:51,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:51,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:51,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:51,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:51,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:51,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:51,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:51,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:51,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:51,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:51,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:21:51,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:21:51,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:51,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:51,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:51,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:21:51,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:51,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:21:51,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:51,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:21:51,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:51,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:21:51,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:21:51,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 05:21:51,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:51,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:51,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:51,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:21:51,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:51,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:21:51,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:51,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:21:51,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:51,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:21:51,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:21:51,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-13 05:21:51,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:51,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:51,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:51,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:21:51,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:51,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:51,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:51,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:51,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:21:51,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:51,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:21:51,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-13 05:21:51,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:51,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:51,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:51,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:21:51,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:51,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:51,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:51,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:51,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:21:51,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:51,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:21:51,629 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-13 05:21:51,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730159628] [2020-10-13 05:21:51,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:51,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:21:51,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365629272] [2020-10-13 05:21:51,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:21:51,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:51,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:21:51,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:21:51,641 INFO L87 Difference]: Start difference. First operand 197 states and 225 transitions. Second operand 10 states. [2020-10-13 05:21:52,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:52,005 INFO L93 Difference]: Finished difference Result 251 states and 284 transitions. [2020-10-13 05:21:52,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 05:21:52,006 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2020-10-13 05:21:52,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:52,010 INFO L225 Difference]: With dead ends: 251 [2020-10-13 05:21:52,011 INFO L226 Difference]: Without dead ends: 202 [2020-10-13 05:21:52,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:21:52,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-13 05:21:52,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 196. [2020-10-13 05:21:52,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-13 05:21:52,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 219 transitions. [2020-10-13 05:21:52,069 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 219 transitions. Word has length 67 [2020-10-13 05:21:52,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:52,070 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 219 transitions. [2020-10-13 05:21:52,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:21:52,070 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 219 transitions. [2020-10-13 05:21:52,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 05:21:52,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:52,072 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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] [2020-10-13 05:21:52,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 05:21:52,072 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:52,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:52,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1467340719, now seen corresponding path program 6 times [2020-10-13 05:21:52,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:52,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183238986] [2020-10-13 05:21:52,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:52,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:52,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:52,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:52,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:52,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:52,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:52,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:53,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:54,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:54,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:55,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:55,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 05:21:55,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 05:21:55,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2976 [2020-10-13 05:21:55,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:55,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:21:55,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 05:21:55,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 05:21:55,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:55,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:55,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:55,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:55,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:55,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:55,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:55,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:55,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:55,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:55,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:55,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:55,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:21:55,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:21:55,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:55,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:55,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:55,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:21:55,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:55,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:55,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:55,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:55,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:55,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:55,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:21:55,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 05:21:55,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:55,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:55,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:55,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:21:55,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:55,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:21:55,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:55,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:21:55,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:55,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:21:55,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:21:55,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-13 05:21:55,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:55,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:55,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:55,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:21:55,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:55,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:21:55,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:55,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:21:55,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:55,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:21:55,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:21:55,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-13 05:21:55,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:55,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:55,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:55,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:21:55,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:55,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:21:55,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:55,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:21:55,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:55,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:21:55,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:21:55,343 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-13 05:21:55,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183238986] [2020-10-13 05:21:55,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:55,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:21:55,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780799628] [2020-10-13 05:21:55,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:21:55,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:55,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:21:55,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:21:55,346 INFO L87 Difference]: Start difference. First operand 196 states and 219 transitions. Second operand 14 states. [2020-10-13 05:21:56,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:56,559 INFO L93 Difference]: Finished difference Result 259 states and 299 transitions. [2020-10-13 05:21:56,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 05:21:56,560 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-10-13 05:21:56,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:56,562 INFO L225 Difference]: With dead ends: 259 [2020-10-13 05:21:56,562 INFO L226 Difference]: Without dead ends: 257 [2020-10-13 05:21:56,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:21:56,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-13 05:21:56,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 241. [2020-10-13 05:21:56,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-10-13 05:21:56,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 276 transitions. [2020-10-13 05:21:56,610 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 276 transitions. Word has length 67 [2020-10-13 05:21:56,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:56,611 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 276 transitions. [2020-10-13 05:21:56,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:21:56,611 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 276 transitions. [2020-10-13 05:21:56,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 05:21:56,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:56,612 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-13 05:21:56,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 05:21:56,613 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:56,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:56,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1290105723, now seen corresponding path program 7 times [2020-10-13 05:21:56,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:56,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674207697] [2020-10-13 05:21:56,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:56,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:56,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:56,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:56,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:56,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:57,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:57,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:57,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:58,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:58,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:00,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:00,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 05:22:00,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 05:22:00,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3530 [2020-10-13 05:22:00,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:00,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 05:22:00,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 05:22:00,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 05:22:00,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:00,408 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-10-13 05:22:00,590 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-13 05:22:00,766 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-10-13 05:22:01,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:01,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:01,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:01,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:01,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:01,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:01,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:01,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:01,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:01,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:01,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:01,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:01,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:22:01,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:01,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:01,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:01,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:22:01,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:01,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:01,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:01,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:01,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:01,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:01,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:01,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-13 05:22:01,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:01,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:01,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:01,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:22:01,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:01,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:01,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:01,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:22:01,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:01,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:22:01,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:01,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-13 05:22:01,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:01,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:01,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:01,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:22:01,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:01,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:01,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:01,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:22:01,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:01,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:22:01,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:01,753 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 05:22:01,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674207697] [2020-10-13 05:22:01,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:01,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 05:22:01,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364777879] [2020-10-13 05:22:01,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 05:22:01,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:01,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 05:22:01,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:22:01,755 INFO L87 Difference]: Start difference. First operand 241 states and 276 transitions. Second operand 20 states. [2020-10-13 05:22:02,427 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-10-13 05:22:02,726 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-10-13 05:22:03,051 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-10-13 05:22:03,412 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-10-13 05:22:03,638 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2020-10-13 05:22:04,107 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 36 [2020-10-13 05:22:04,394 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2020-10-13 05:22:04,698 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2020-10-13 05:22:05,194 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-10-13 05:22:05,394 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-10-13 05:22:05,934 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-10-13 05:22:06,122 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2020-10-13 05:22:06,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:06,895 INFO L93 Difference]: Finished difference Result 285 states and 328 transitions. [2020-10-13 05:22:06,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 05:22:06,897 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 66 [2020-10-13 05:22:06,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:06,899 INFO L225 Difference]: With dead ends: 285 [2020-10-13 05:22:06,900 INFO L226 Difference]: Without dead ends: 259 [2020-10-13 05:22:06,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=279, Invalid=1883, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 05:22:06,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-13 05:22:06,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 223. [2020-10-13 05:22:06,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-13 05:22:06,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 254 transitions. [2020-10-13 05:22:06,939 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 254 transitions. Word has length 66 [2020-10-13 05:22:06,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:06,939 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 254 transitions. [2020-10-13 05:22:06,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 05:22:06,940 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 254 transitions. [2020-10-13 05:22:06,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 05:22:06,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:06,941 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-10-13 05:22:06,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 05:22:06,941 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:06,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:06,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1622449505, now seen corresponding path program 7 times [2020-10-13 05:22:06,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:06,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201280160] [2020-10-13 05:22:06,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:06,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:06,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:07,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:07,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:08,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:08,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:09,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:09,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:09,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:10,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:11,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:11,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 05:22:11,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 05:22:11,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:22:11,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:11,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 05:22:11,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 05:22:11,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 05:22:11,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:13,506 WARN L193 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 39 [2020-10-13 05:22:14,136 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 44 [2020-10-13 05:22:17,151 WARN L193 SmtUtils]: Spent 2.70 s on a formula simplification. DAG size of input: 313 DAG size of output: 43 [2020-10-13 05:22:25,864 WARN L193 SmtUtils]: Spent 8.42 s on a formula simplification. DAG size of input: 484 DAG size of output: 95 [2020-10-13 05:22:30,103 WARN L193 SmtUtils]: Spent 3.87 s on a formula simplification. DAG size of input: 484 DAG size of output: 103 [2020-10-13 05:22:34,928 WARN L193 SmtUtils]: Spent 3.86 s on a formula simplification. DAG size of input: 626 DAG size of output: 166 [2020-10-13 05:22:36,432 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 518 DAG size of output: 90 [2020-10-13 05:22:38,166 WARN L193 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 449 DAG size of output: 28 [2020-10-13 05:22:39,848 WARN L193 SmtUtils]: Spent 912.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 42 [2020-10-13 05:22:41,302 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 391 DAG size of output: 33 [2020-10-13 05:22:42,218 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 28 [2020-10-13 05:22:42,780 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 28 [2020-10-13 05:22:43,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:43,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:43,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:43,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:43,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:43,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:43,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:43,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:43,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:43,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:43,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:43,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:43,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:22:43,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:43,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:43,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:43,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:22:43,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:43,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:43,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:43,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:43,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:43,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:43,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:43,856 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 31 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:22:43,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201280160] [2020-10-13 05:22:43,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:43,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 05:22:43,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575814636] [2020-10-13 05:22:43,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 05:22:43,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:43,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 05:22:43,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:22:43,858 INFO L87 Difference]: Start difference. First operand 223 states and 254 transitions. Second operand 25 states. [2020-10-13 05:22:46,157 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-13 05:22:47,536 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-10-13 05:22:47,995 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 54 [2020-10-13 05:22:48,648 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 60 [2020-10-13 05:22:50,103 WARN L193 SmtUtils]: Spent 910.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 79 [2020-10-13 05:22:52,003 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 214 DAG size of output: 145 [2020-10-13 05:22:52,980 WARN L193 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 92 [2020-10-13 05:22:54,095 WARN L193 SmtUtils]: Spent 912.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 105 [2020-10-13 05:22:55,264 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-13 05:22:56,441 WARN L193 SmtUtils]: Spent 978.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 130 [2020-10-13 05:22:57,141 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-13 05:22:58,073 WARN L193 SmtUtils]: Spent 759.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 116 [2020-10-13 05:22:58,942 WARN L193 SmtUtils]: Spent 720.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 111 [2020-10-13 05:22:59,367 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-10-13 05:22:59,890 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-10-13 05:23:00,381 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-13 05:23:01,355 WARN L193 SmtUtils]: Spent 775.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 111 [2020-10-13 05:23:01,899 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-10-13 05:23:02,774 WARN L193 SmtUtils]: Spent 740.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 107 [2020-10-13 05:23:03,285 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-13 05:23:04,191 WARN L193 SmtUtils]: Spent 751.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 103 [2020-10-13 05:23:04,790 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-13 05:23:05,348 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-13 05:23:06,056 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-13 05:23:06,707 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-13 05:23:06,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:23:06,787 INFO L93 Difference]: Finished difference Result 356 states and 423 transitions. [2020-10-13 05:23:06,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-13 05:23:06,790 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 64 [2020-10-13 05:23:06,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:23:06,792 INFO L225 Difference]: With dead ends: 356 [2020-10-13 05:23:06,793 INFO L226 Difference]: Without dead ends: 315 [2020-10-13 05:23:06,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 5 SyntacticMatches, 15 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 48.0s TimeCoverageRelationStatistics Valid=429, Invalid=2993, Unknown=0, NotChecked=0, Total=3422 [2020-10-13 05:23:06,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-13 05:23:06,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 230. [2020-10-13 05:23:06,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-13 05:23:06,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 262 transitions. [2020-10-13 05:23:06,846 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 262 transitions. Word has length 64 [2020-10-13 05:23:06,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:23:06,847 INFO L479 AbstractCegarLoop]: Abstraction has 230 states and 262 transitions. [2020-10-13 05:23:06,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 05:23:06,847 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 262 transitions. [2020-10-13 05:23:06,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 05:23:06,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:23:06,848 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2020-10-13 05:23:06,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 05:23:06,848 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:23:06,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:23:06,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1495123718, now seen corresponding path program 8 times [2020-10-13 05:23:06,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:23:06,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507440985] [2020-10-13 05:23:06,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:23:06,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:06,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:07,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:09,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:09,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 05:23:09,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:23:09,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3018 [2020-10-13 05:23:09,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:09,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:23:09,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 05:23:09,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 05:23:09,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:10,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:23:10,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:10,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:10,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:10,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:23:10,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:10,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:10,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:10,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:10,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:10,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:10,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:10,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:23:10,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:10,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:10,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:10,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:23:10,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:10,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:23:10,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:10,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:10,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:10,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:10,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:10,226 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 66 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:23:10,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507440985] [2020-10-13 05:23:10,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:23:10,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:23:10,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740333311] [2020-10-13 05:23:10,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:23:10,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:23:10,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:23:10,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:23:10,227 INFO L87 Difference]: Start difference. First operand 230 states and 262 transitions. Second operand 16 states. [2020-10-13 05:23:11,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:23:11,771 INFO L93 Difference]: Finished difference Result 421 states and 501 transitions. [2020-10-13 05:23:11,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 05:23:11,775 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 68 [2020-10-13 05:23:11,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:23:11,778 INFO L225 Difference]: With dead ends: 421 [2020-10-13 05:23:11,778 INFO L226 Difference]: Without dead ends: 372 [2020-10-13 05:23:11,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=198, Invalid=614, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:23:11,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-10-13 05:23:11,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 249. [2020-10-13 05:23:11,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-13 05:23:11,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 285 transitions. [2020-10-13 05:23:11,834 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 285 transitions. Word has length 68 [2020-10-13 05:23:11,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:23:11,834 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 285 transitions. [2020-10-13 05:23:11,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:23:11,835 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 285 transitions. [2020-10-13 05:23:11,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 05:23:11,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:23:11,836 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 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] [2020-10-13 05:23:11,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 05:23:11,837 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:23:11,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:23:11,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1868374137, now seen corresponding path program 8 times [2020-10-13 05:23:11,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:23:11,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523824354] [2020-10-13 05:23:11,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:23:11,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:11,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:11,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:11,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:12,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:12,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:12,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:12,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:12,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:12,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:13,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:13,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:13,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:14,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:14,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:14,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:14,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:16,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:16,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 05:23:16,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 05:23:16,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:23:16,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:16,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:23:16,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 05:23:16,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 05:23:16,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:17,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:23:17,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:17,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:17,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:17,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:23:17,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:17,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:17,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:17,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:17,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:17,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:17,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:17,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:23:17,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:17,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:17,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:17,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:23:17,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:17,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:17,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:17,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:17,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:17,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:17,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:17,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 05:23:17,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:17,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:17,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:17,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:23:17,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:17,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:23:17,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:17,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:23:17,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:17,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:23:17,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:17,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-13 05:23:17,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:17,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:17,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:17,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:23:17,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:17,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:17,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:17,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:23:17,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:17,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:23:17,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:17,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-13 05:23:17,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:17,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:17,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:17,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:23:17,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:17,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:17,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:17,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:23:17,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:17,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:23:17,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:17,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-13 05:23:17,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:17,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:17,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:17,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:23:17,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:17,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:23:17,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:17,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:17,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:23:17,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:17,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:17,277 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 28 proven. 27 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-13 05:23:17,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523824354] [2020-10-13 05:23:17,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:23:17,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 05:23:17,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749876406] [2020-10-13 05:23:17,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 05:23:17,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:23:17,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 05:23:17,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:23:17,279 INFO L87 Difference]: Start difference. First operand 249 states and 285 transitions. Second operand 15 states. [2020-10-13 05:23:18,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:23:18,902 INFO L93 Difference]: Finished difference Result 308 states and 349 transitions. [2020-10-13 05:23:18,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 05:23:18,905 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 76 [2020-10-13 05:23:18,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:23:18,907 INFO L225 Difference]: With dead ends: 308 [2020-10-13 05:23:18,908 INFO L226 Difference]: Without dead ends: 264 [2020-10-13 05:23:18,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:23:18,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-13 05:23:18,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 249. [2020-10-13 05:23:18,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-13 05:23:18,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 282 transitions. [2020-10-13 05:23:18,959 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 282 transitions. Word has length 76 [2020-10-13 05:23:18,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:23:18,960 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 282 transitions. [2020-10-13 05:23:18,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 05:23:18,960 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 282 transitions. [2020-10-13 05:23:18,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 05:23:18,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:23:18,961 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 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] [2020-10-13 05:23:18,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 05:23:18,962 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:23:18,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:23:18,962 INFO L82 PathProgramCache]: Analyzing trace with hash 857256887, now seen corresponding path program 9 times [2020-10-13 05:23:18,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:23:18,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780566302] [2020-10-13 05:23:18,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:23:18,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:18,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:19,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:19,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:19,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:21,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:21,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 05:23:21,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:23:21,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2245 [2020-10-13 05:23:21,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:21,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 05:23:21,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 05:23:21,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 05:23:21,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:21,469 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 18 [2020-10-13 05:23:21,975 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 17 [2020-10-13 05:23:22,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:23:22,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:22,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:22,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:22,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:23:22,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:22,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:22,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:22,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:22,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:22,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:22,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:22,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:23:22,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:22,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:22,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:22,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:23:22,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:22,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:23:22,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:22,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 05:23:22,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:22,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:23:22,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:22,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 05:23:22,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:22,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:22,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:22,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:23:22,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:22,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:23:22,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:22,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:23:22,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:22,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:23:22,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:22,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-13 05:23:22,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:22,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:22,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:22,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:23:22,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:22,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:23:22,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:22,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:23:22,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:22,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:23:22,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:22,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-13 05:23:22,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:22,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:22,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:22,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:23:22,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:22,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:22,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:22,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:23:22,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:22,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:23:22,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:22,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-13 05:23:22,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:22,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:22,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:22,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:23:22,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:22,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:22,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:22,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:23:22,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:22,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:23:22,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:22,330 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 34 proven. 22 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-13 05:23:22,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780566302] [2020-10-13 05:23:22,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:23:22,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 05:23:22,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458675937] [2020-10-13 05:23:22,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 05:23:22,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:23:22,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 05:23:22,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:23:22,332 INFO L87 Difference]: Start difference. First operand 249 states and 282 transitions. Second operand 15 states. [2020-10-13 05:23:23,403 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-10-13 05:23:23,583 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-10-13 05:23:23,842 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-10-13 05:23:24,103 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2020-10-13 05:23:24,395 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-10-13 05:23:24,681 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-10-13 05:23:25,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:23:25,139 INFO L93 Difference]: Finished difference Result 303 states and 338 transitions. [2020-10-13 05:23:25,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 05:23:25,139 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 76 [2020-10-13 05:23:25,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:23:25,141 INFO L225 Difference]: With dead ends: 303 [2020-10-13 05:23:25,141 INFO L226 Difference]: Without dead ends: 243 [2020-10-13 05:23:25,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2020-10-13 05:23:25,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-13 05:23:25,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2020-10-13 05:23:25,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-10-13 05:23:25,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 271 transitions. [2020-10-13 05:23:25,192 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 271 transitions. Word has length 76 [2020-10-13 05:23:25,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:23:25,192 INFO L479 AbstractCegarLoop]: Abstraction has 243 states and 271 transitions. [2020-10-13 05:23:25,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 05:23:25,192 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 271 transitions. [2020-10-13 05:23:25,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 05:23:25,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:23:25,194 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2020-10-13 05:23:25,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 05:23:25,194 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:23:25,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:23:25,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1627902545, now seen corresponding path program 10 times [2020-10-13 05:23:25,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:23:25,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880454855] [2020-10-13 05:23:25,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:23:25,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:25,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:25,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:25,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:25,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:25,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:26,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:26,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:26,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:26,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:27,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:27,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:30,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:30,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 05:23:30,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 05:23:30,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 05:23:30,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:30,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 05:23:30,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 05:23:30,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 05:23:30,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:30,920 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-10-13 05:23:31,366 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-10-13 05:23:32,090 WARN L193 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-10-13 05:23:32,459 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2020-10-13 05:23:32,961 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-10-13 05:23:34,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:23:34,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:34,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:34,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:34,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:23:34,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:34,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:34,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:34,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:34,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:34,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:34,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:34,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:23:34,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:34,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:34,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:34,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:23:34,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:34,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:34,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:34,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:34,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:34,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:34,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:34,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-13 05:23:34,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:34,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:34,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:34,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:23:34,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:34,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:23:34,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:34,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:23:34,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:34,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:23:34,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:34,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-13 05:23:34,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:34,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:34,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:34,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:23:34,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:34,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:34,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:34,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:23:34,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:34,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:23:34,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:34,430 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 05:23:34,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880454855] [2020-10-13 05:23:34,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:23:34,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 05:23:34,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601825299] [2020-10-13 05:23:34,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 05:23:34,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:23:34,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 05:23:34,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:23:34,431 INFO L87 Difference]: Start difference. First operand 243 states and 271 transitions. Second operand 22 states. [2020-10-13 05:23:35,396 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-10-13 05:23:35,764 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 42 [2020-10-13 05:23:36,213 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2020-10-13 05:23:36,568 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2020-10-13 05:23:37,054 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2020-10-13 05:23:37,736 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 41 [2020-10-13 05:23:38,431 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-10-13 05:23:39,655 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-10-13 05:23:40,654 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2020-10-13 05:23:42,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:23:42,002 INFO L93 Difference]: Finished difference Result 305 states and 343 transitions. [2020-10-13 05:23:42,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 05:23:42,004 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 74 [2020-10-13 05:23:42,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:23:42,006 INFO L225 Difference]: With dead ends: 305 [2020-10-13 05:23:42,006 INFO L226 Difference]: Without dead ends: 279 [2020-10-13 05:23:42,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 9 SyntacticMatches, 11 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=289, Invalid=1873, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 05:23:42,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-13 05:23:42,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 260. [2020-10-13 05:23:42,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-13 05:23:42,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 290 transitions. [2020-10-13 05:23:42,049 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 290 transitions. Word has length 74 [2020-10-13 05:23:42,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:23:42,049 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 290 transitions. [2020-10-13 05:23:42,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 05:23:42,050 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 290 transitions. [2020-10-13 05:23:42,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 05:23:42,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:23:42,051 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2020-10-13 05:23:42,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 05:23:42,051 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:23:42,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:23:42,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1443213973, now seen corresponding path program 9 times [2020-10-13 05:23:42,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:23:42,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323651972] [2020-10-13 05:23:42,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:23:42,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:42,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:42,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:43,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:43,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:43,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:43,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:44,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:44,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:45,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:45,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:47,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:47,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 05:23:47,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 05:23:47,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:23:47,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:47,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-13 05:23:47,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 05:23:47,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-13 05:23:47,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:47,878 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-10-13 05:23:48,137 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-10-13 05:23:48,460 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2020-10-13 05:23:48,783 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2020-10-13 05:23:49,110 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2020-10-13 05:23:49,451 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 33 [2020-10-13 05:23:49,820 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2020-10-13 05:23:50,207 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2020-10-13 05:23:50,604 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2020-10-13 05:23:50,884 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 31 [2020-10-13 05:23:51,376 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 27 [2020-10-13 05:23:51,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:23:51,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:51,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:51,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:51,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:23:51,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:51,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:51,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:51,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:51,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:51,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:51,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:51,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 05:23:51,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:51,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:51,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:51,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:23:51,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:51,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:51,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:51,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:51,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:51,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:51,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:51,914 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 11 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:23:51,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323651972] [2020-10-13 05:23:51,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:23:51,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 05:23:51,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138976370] [2020-10-13 05:23:51,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 05:23:51,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:23:51,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 05:23:51,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:23:51,916 INFO L87 Difference]: Start difference. First operand 260 states and 290 transitions. Second operand 24 states. [2020-10-13 05:23:52,902 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2020-10-13 05:23:53,482 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-13 05:23:54,155 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2020-10-13 05:23:54,749 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2020-10-13 05:23:55,535 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2020-10-13 05:23:56,190 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2020-10-13 05:23:56,857 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-13 05:23:57,511 WARN L193 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 73 [2020-10-13 05:23:58,388 WARN L193 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 79 [2020-10-13 05:23:59,305 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-13 05:23:59,970 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 76 [2020-10-13 05:24:00,950 WARN L193 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2020-10-13 05:24:01,643 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-10-13 05:24:01,937 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2020-10-13 05:24:02,412 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2020-10-13 05:24:02,966 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-13 05:24:04,359 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 127 DAG size of output: 114 [2020-10-13 05:24:04,655 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2020-10-13 05:24:04,973 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-13 05:24:05,553 WARN L193 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2020-10-13 05:24:06,656 WARN L193 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2020-10-13 05:24:08,063 WARN L193 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-13 05:24:09,161 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 83