/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-examples/standard_two_index_05.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 05:02:10,566 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 05:02:10,569 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 05:02:10,593 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 05:02:10,593 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 05:02:10,594 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 05:02:10,596 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 05:02:10,597 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 05:02:10,599 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 05:02:10,600 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 05:02:10,601 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 05:02:10,602 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 05:02:10,602 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 05:02:10,603 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 05:02:10,604 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 05:02:10,605 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 05:02:10,606 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 05:02:10,607 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 05:02:10,608 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 05:02:10,610 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 05:02:10,611 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 05:02:10,612 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 05:02:10,613 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 05:02:10,614 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 05:02:10,616 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 05:02:10,617 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 05:02:10,617 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 05:02:10,618 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 05:02:10,618 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 05:02:10,619 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 05:02:10,619 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 05:02:10,620 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 05:02:10,621 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 05:02:10,621 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 05:02:10,622 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 05:02:10,623 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 05:02:10,623 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 05:02:10,623 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 05:02:10,624 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 05:02:10,624 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 05:02:10,625 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 05:02:10,626 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 05:02:10,648 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 05:02:10,649 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 05:02:10,650 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 05:02:10,650 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 05:02:10,650 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 05:02:10,650 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 05:02:10,651 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 05:02:10,651 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 05:02:10,651 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 05:02:10,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 05:02:10,651 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 05:02:10,652 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 05:02:10,652 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 05:02:10,652 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 05:02:10,652 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 05:02:10,652 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 05:02:10,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 05:02:10,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 05:02:10,653 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 05:02:10,653 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 05:02:10,654 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 05:02:10,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:02:10,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 05:02:10,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 05:02:10,655 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 05:02:10,655 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 05:02:10,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 05:02:10,655 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 05:02:10,655 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 05:02:10,656 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 05:02:10,967 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 05:02:10,980 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 05:02:10,983 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 05:02:10,985 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 05:02:10,985 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 05:02:10,986 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_05.i [2020-10-13 05:02:11,048 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cbf58b1bc/91d418aab82643c7baf6e15f25b5d882/FLAG31a0536e2 [2020-10-13 05:02:11,441 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 05:02:11,441 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_two_index_05.i [2020-10-13 05:02:11,448 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cbf58b1bc/91d418aab82643c7baf6e15f25b5d882/FLAG31a0536e2 [2020-10-13 05:02:11,835 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cbf58b1bc/91d418aab82643c7baf6e15f25b5d882 [2020-10-13 05:02:11,847 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 05:02:11,849 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 05:02:11,853 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 05:02:11,853 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 05:02:11,857 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 05:02:11,858 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:02:11" (1/1) ... [2020-10-13 05:02:11,861 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@490952e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:11, skipping insertion in model container [2020-10-13 05:02:11,861 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:02:11" (1/1) ... [2020-10-13 05:02:11,870 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 05:02:11,893 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 05:02:12,119 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:02:12,123 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 05:02:12,146 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:02:12,166 INFO L208 MainTranslator]: Completed translation [2020-10-13 05:02:12,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:12 WrapperNode [2020-10-13 05:02:12,167 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 05:02:12,167 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 05:02:12,168 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 05:02:12,168 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 05:02:12,268 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:12" (1/1) ... [2020-10-13 05:02:12,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:12" (1/1) ... [2020-10-13 05:02:12,278 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:12" (1/1) ... [2020-10-13 05:02:12,278 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:12" (1/1) ... [2020-10-13 05:02:12,289 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:12" (1/1) ... [2020-10-13 05:02:12,293 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:12" (1/1) ... [2020-10-13 05:02:12,294 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:12" (1/1) ... [2020-10-13 05:02:12,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 05:02:12,297 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 05:02:12,297 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 05:02:12,297 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 05:02:12,298 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:12" (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 05:02:12,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 05:02:12,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 05:02:12,351 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 05:02:12,351 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 05:02:12,351 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 05:02:12,351 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 05:02:12,351 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 05:02:12,351 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 05:02:12,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 05:02:12,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 05:02:12,352 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 05:02:12,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 05:02:12,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 05:02:12,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 05:02:12,562 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 05:02:12,562 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 05:02:12,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:02:12 BoogieIcfgContainer [2020-10-13 05:02:12,566 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 05:02:12,567 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 05:02:12,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 05:02:12,570 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 05:02:12,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:02:11" (1/3) ... [2020-10-13 05:02:12,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e26e127 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:02:12, skipping insertion in model container [2020-10-13 05:02:12,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:12" (2/3) ... [2020-10-13 05:02:12,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e26e127 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:02:12, skipping insertion in model container [2020-10-13 05:02:12,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:02:12" (3/3) ... [2020-10-13 05:02:12,574 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_05.i [2020-10-13 05:02:12,585 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 05:02:12,592 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 05:02:12,611 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 05:02:12,666 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 05:02:12,667 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 05:02:12,667 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 05:02:12,667 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 05:02:12,667 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 05:02:12,667 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 05:02:12,667 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 05:02:12,668 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 05:02:12,702 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-13 05:02:12,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 05:02:12,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:12,719 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:12,720 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:12,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:12,725 INFO L82 PathProgramCache]: Analyzing trace with hash -2029643862, now seen corresponding path program 1 times [2020-10-13 05:02:12,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:12,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386187867] [2020-10-13 05:02:12,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:12,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:12,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:12,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:13,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:13,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 05:02:13,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:02:13,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 203 [2020-10-13 05:02:13,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:13,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:13,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:02:13,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:13,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 05:02:13,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:13,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:13,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:13,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:13,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:13,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:13,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-13 05:02:13,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:13,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:13,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:13,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:13,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:02:13,156 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 05:02:13,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386187867] [2020-10-13 05:02:13,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:02:13,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 05:02:13,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561171287] [2020-10-13 05:02:13,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 05:02:13,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:13,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 05:02:13,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:02:13,184 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-10-13 05:02:13,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:13,266 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-10-13 05:02:13,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 05:02:13,273 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-13 05:02:13,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:13,283 INFO L225 Difference]: With dead ends: 41 [2020-10-13 05:02:13,283 INFO L226 Difference]: Without dead ends: 19 [2020-10-13 05:02:13,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 05:02:13,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-13 05:02:13,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-13 05:02:13,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-13 05:02:13,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-13 05:02:13,331 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2020-10-13 05:02:13,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:13,332 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-13 05:02:13,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 05:02:13,333 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-13 05:02:13,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 05:02:13,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:13,334 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:13,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 05:02:13,335 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:13,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:13,336 INFO L82 PathProgramCache]: Analyzing trace with hash 905206694, now seen corresponding path program 1 times [2020-10-13 05:02:13,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:13,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746035957] [2020-10-13 05:02:13,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:13,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:13,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:13,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:13,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:13,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 05:02:13,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:02:13,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-13 05:02:13,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:13,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:02:13,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:02:13,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 05:02:13,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:02:13,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:13,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:13,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:13,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:13,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:13,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:13,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:02:13,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:13,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:13,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:13,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:13,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:13,616 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 05:02:13,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746035957] [2020-10-13 05:02:13,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:02:13,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 05:02:13,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765861717] [2020-10-13 05:02:13,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 05:02:13,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:13,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 05:02:13,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:02:13,623 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 4 states. [2020-10-13 05:02:13,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:13,698 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-10-13 05:02:13,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 05:02:13,699 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-13 05:02:13,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:13,700 INFO L225 Difference]: With dead ends: 32 [2020-10-13 05:02:13,700 INFO L226 Difference]: Without dead ends: 20 [2020-10-13 05:02:13,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 05:02:13,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-13 05:02:13,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-13 05:02:13,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-13 05:02:13,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-13 05:02:13,708 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2020-10-13 05:02:13,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:13,709 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-13 05:02:13,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 05:02:13,709 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-13 05:02:13,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 05:02:13,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:13,710 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:13,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 05:02:13,711 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:13,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:13,711 INFO L82 PathProgramCache]: Analyzing trace with hash -764882998, now seen corresponding path program 1 times [2020-10-13 05:02:13,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:13,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1622713095] [2020-10-13 05:02:13,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:13,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:13,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:13,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:13,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:13,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 05:02:13,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:02:13,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-13 05:02:13,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:13,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:02:13,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 05:02:13,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 05:02:13,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:13,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:13,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:13,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:13,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:13,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:13,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:13,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:02:13,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:13,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:13,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:13,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:13,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:13,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:02:13,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1622713095] [2020-10-13 05:02:13,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:02:13,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 05:02:13,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200735197] [2020-10-13 05:02:13,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 05:02:13,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:13,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 05:02:13,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:02:13,892 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2020-10-13 05:02:13,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:13,956 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-10-13 05:02:13,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 05:02:13,957 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-13 05:02:13,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:13,960 INFO L225 Difference]: With dead ends: 34 [2020-10-13 05:02:13,961 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 05:02:13,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 05:02:13,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 05:02:13,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2020-10-13 05:02:13,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 05:02:13,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-13 05:02:13,972 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2020-10-13 05:02:13,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:13,972 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-13 05:02:13,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 05:02:13,973 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-13 05:02:13,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 05:02:13,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:13,974 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:13,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 05:02:13,974 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:13,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:13,975 INFO L82 PathProgramCache]: Analyzing trace with hash -59429947, now seen corresponding path program 1 times [2020-10-13 05:02:13,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:13,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461347472] [2020-10-13 05:02:13,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:13,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:13,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:14,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:14,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:14,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:14,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 05:02:14,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:14,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 289 [2020-10-13 05:02:14,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:14,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 05:02:14,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:02:14,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 05:02:14,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:14,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:14,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:14,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:14,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:14,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:14,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:14,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:02:14,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:14,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:14,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:14,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:14,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:14,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:02:14,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461347472] [2020-10-13 05:02:14,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:14,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 05:02:14,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572818300] [2020-10-13 05:02:14,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 05:02:14,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:14,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 05:02:14,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:02:14,318 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-10-13 05:02:14,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:14,392 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-10-13 05:02:14,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 05:02:14,393 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-13 05:02:14,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:14,394 INFO L225 Difference]: With dead ends: 38 [2020-10-13 05:02:14,394 INFO L226 Difference]: Without dead ends: 25 [2020-10-13 05:02:14,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:02:14,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-13 05:02:14,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-10-13 05:02:14,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 05:02:14,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-13 05:02:14,402 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2020-10-13 05:02:14,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:14,403 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-13 05:02:14,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 05:02:14,404 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-13 05:02:14,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 05:02:14,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:14,405 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:14,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 05:02:14,406 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:14,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:14,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1302144745, now seen corresponding path program 2 times [2020-10-13 05:02:14,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:14,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210921070] [2020-10-13 05:02:14,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:14,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:14,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:14,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:14,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:14,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:14,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 05:02:14,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:14,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 544 [2020-10-13 05:02:14,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:14,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 05:02:14,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 05:02:14,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 05:02:14,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:02:14,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:14,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:15,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:15,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:15,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:15,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:02:15,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:15,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:15,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:15,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:15,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:15,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 05:02:15,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210921070] [2020-10-13 05:02:15,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:15,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 05:02:15,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375011559] [2020-10-13 05:02:15,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 05:02:15,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:15,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 05:02:15,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:02:15,007 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2020-10-13 05:02:15,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:15,085 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-10-13 05:02:15,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 05:02:15,086 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-13 05:02:15,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:15,087 INFO L225 Difference]: With dead ends: 39 [2020-10-13 05:02:15,087 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 05:02:15,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:02:15,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 05:02:15,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2020-10-13 05:02:15,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 05:02:15,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-13 05:02:15,094 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2020-10-13 05:02:15,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:15,095 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-13 05:02:15,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 05:02:15,095 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-13 05:02:15,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 05:02:15,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:15,096 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:15,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 05:02:15,096 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:15,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:15,097 INFO L82 PathProgramCache]: Analyzing trace with hash -406079354, now seen corresponding path program 3 times [2020-10-13 05:02:15,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:15,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486999294] [2020-10-13 05:02:15,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:15,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:15,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:15,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:15,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:15,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:15,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 05:02:15,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:15,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 318 [2020-10-13 05:02:15,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:15,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 05:02:15,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 05:02:15,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 05:02:15,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:15,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:15,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:15,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:15,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:15,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:15,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:15,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:02:15,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:15,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:15,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:15,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:15,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:15,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 05:02:15,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486999294] [2020-10-13 05:02:15,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:15,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 05:02:15,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136466508] [2020-10-13 05:02:15,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 05:02:15,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:15,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 05:02:15,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:02:15,494 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2020-10-13 05:02:15,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:15,592 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-10-13 05:02:15,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 05:02:15,592 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-13 05:02:15,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:15,593 INFO L225 Difference]: With dead ends: 48 [2020-10-13 05:02:15,594 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 05:02:15,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:02:15,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 05:02:15,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2020-10-13 05:02:15,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 05:02:15,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-13 05:02:15,601 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 19 [2020-10-13 05:02:15,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:15,602 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-13 05:02:15,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 05:02:15,602 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-13 05:02:15,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 05:02:15,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:15,603 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:15,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 05:02:15,604 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:15,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:15,604 INFO L82 PathProgramCache]: Analyzing trace with hash -820912923, now seen corresponding path program 4 times [2020-10-13 05:02:15,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:15,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660701906] [2020-10-13 05:02:15,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:15,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:15,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:15,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:15,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:16,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:16,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 05:02:16,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:16,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 612 [2020-10-13 05:02:16,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:16,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:02:16,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:02:16,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 05:02:16,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:16,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:16,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:16,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:16,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:16,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:16,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:16,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:02:16,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:16,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:16,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:16,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:16,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:16,279 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 05:02:16,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660701906] [2020-10-13 05:02:16,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:16,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 05:02:16,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916961665] [2020-10-13 05:02:16,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 05:02:16,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:16,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 05:02:16,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 05:02:16,282 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 7 states. [2020-10-13 05:02:16,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:16,364 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-10-13 05:02:16,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 05:02:16,365 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-13 05:02:16,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:16,366 INFO L225 Difference]: With dead ends: 44 [2020-10-13 05:02:16,366 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 05:02:16,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 05:02:16,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 05:02:16,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-10-13 05:02:16,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 05:02:16,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-13 05:02:16,372 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2020-10-13 05:02:16,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:16,373 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-13 05:02:16,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 05:02:16,373 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-13 05:02:16,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 05:02:16,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:16,374 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:16,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 05:02:16,374 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:16,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:16,375 INFO L82 PathProgramCache]: Analyzing trace with hash 130000393, now seen corresponding path program 5 times [2020-10-13 05:02:16,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:16,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424710225] [2020-10-13 05:02:16,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:16,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:16,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:16,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:16,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:17,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:17,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 05:02:17,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:17,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 953 [2020-10-13 05:02:17,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:17,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:02:17,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 05:02:17,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 05:02:17,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:17,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:17,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:17,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:17,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:17,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:17,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:17,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:02:17,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:17,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:17,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:17,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:17,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:17,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 05:02:17,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424710225] [2020-10-13 05:02:17,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:17,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 05:02:17,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024291153] [2020-10-13 05:02:17,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 05:02:17,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:17,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 05:02:17,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 05:02:17,395 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 7 states. [2020-10-13 05:02:17,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:17,513 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-10-13 05:02:17,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 05:02:17,514 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-13 05:02:17,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:17,515 INFO L225 Difference]: With dead ends: 49 [2020-10-13 05:02:17,515 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 05:02:17,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 05:02:17,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 05:02:17,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 27. [2020-10-13 05:02:17,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 05:02:17,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-13 05:02:17,522 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2020-10-13 05:02:17,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:17,523 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-13 05:02:17,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 05:02:17,523 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-13 05:02:17,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 05:02:17,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:17,524 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:17,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 05:02:17,524 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:17,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:17,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1912151398, now seen corresponding path program 6 times [2020-10-13 05:02:17,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:17,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918344015] [2020-10-13 05:02:17,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:17,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:17,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:17,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:17,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:18,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:18,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 05:02:18,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:18,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1209 [2020-10-13 05:02:18,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:18,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:02:18,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:02:18,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:02:18,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:02:18,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:18,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:18,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:18,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:18,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:18,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:18,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:02:18,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:18,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:18,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:18,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:18,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:02:18,837 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 05:02:18,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918344015] [2020-10-13 05:02:18,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:18,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:02:18,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182983225] [2020-10-13 05:02:18,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:02:18,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:18,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:02:18,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:02:18,840 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 8 states. [2020-10-13 05:02:18,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:18,970 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-10-13 05:02:18,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 05:02:18,971 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-13 05:02:18,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:18,972 INFO L225 Difference]: With dead ends: 47 [2020-10-13 05:02:18,973 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 05:02:18,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:02:18,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 05:02:18,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-10-13 05:02:18,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 05:02:18,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-13 05:02:18,979 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2020-10-13 05:02:18,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:18,979 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-13 05:02:18,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:02:18,979 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-13 05:02:18,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 05:02:18,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:18,980 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:18,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 05:02:18,981 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:18,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:18,982 INFO L82 PathProgramCache]: Analyzing trace with hash 911814026, now seen corresponding path program 7 times [2020-10-13 05:02:18,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:18,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599627628] [2020-10-13 05:02:18,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:18,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:19,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:19,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:19,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:20,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:20,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 05:02:20,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:20,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1526 [2020-10-13 05:02:20,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:20,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:02:20,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 05:02:20,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:02:20,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:20,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:20,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:20,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:20,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:20,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:20,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:20,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:02:20,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:20,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:20,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:20,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:20,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:20,590 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 05:02:20,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599627628] [2020-10-13 05:02:20,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:20,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:02:20,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791578147] [2020-10-13 05:02:20,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:02:20,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:20,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:02:20,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:02:20,594 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2020-10-13 05:02:20,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:20,742 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-10-13 05:02:20,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 05:02:20,743 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-13 05:02:20,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:20,745 INFO L225 Difference]: With dead ends: 54 [2020-10-13 05:02:20,745 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 05:02:20,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:02:20,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 05:02:20,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2020-10-13 05:02:20,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 05:02:20,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-13 05:02:20,752 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2020-10-13 05:02:20,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:20,753 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-13 05:02:20,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:02:20,753 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-13 05:02:20,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 05:02:20,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:20,754 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:20,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 05:02:20,755 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:20,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:20,755 INFO L82 PathProgramCache]: Analyzing trace with hash 378570245, now seen corresponding path program 8 times [2020-10-13 05:02:20,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:20,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449534058] [2020-10-13 05:02:20,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:20,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:20,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:20,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:21,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:22,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:22,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 05:02:22,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:22,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1560 [2020-10-13 05:02:22,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:22,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 05:02:22,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 05:02:22,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:02:22,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:22,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:22,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:22,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:22,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:22,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:22,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:22,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:02:22,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:22,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:22,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:22,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:22,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:02:22,415 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 05:02:22,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449534058] [2020-10-13 05:02:22,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:22,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 05:02:22,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795164074] [2020-10-13 05:02:22,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 05:02:22,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:22,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 05:02:22,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:02:22,418 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 9 states. [2020-10-13 05:02:22,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:22,575 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2020-10-13 05:02:22,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 05:02:22,576 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-13 05:02:22,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:22,577 INFO L225 Difference]: With dead ends: 66 [2020-10-13 05:02:22,577 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 05:02:22,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:02:22,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 05:02:22,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 31. [2020-10-13 05:02:22,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 05:02:22,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-13 05:02:22,586 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 25 [2020-10-13 05:02:22,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:22,586 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-13 05:02:22,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 05:02:22,586 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-13 05:02:22,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 05:02:22,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:22,591 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:22,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 05:02:22,592 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:22,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:22,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1539667386, now seen corresponding path program 9 times [2020-10-13 05:02:22,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:22,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449605868] [2020-10-13 05:02:22,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:22,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:22,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:22,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:23,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:24,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:24,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 05:02:24,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:24,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2051 [2020-10-13 05:02:24,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:24,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:02:24,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 05:02:24,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 05:02:24,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:24,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:24,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:24,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:24,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:24,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:24,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:24,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:02:24,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:24,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:24,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:24,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:24,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:02:24,779 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-13 05:02:24,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449605868] [2020-10-13 05:02:24,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:24,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:02:24,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448487520] [2020-10-13 05:02:24,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:02:24,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:24,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:02:24,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:02:24,782 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 10 states. [2020-10-13 05:02:25,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:25,009 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2020-10-13 05:02:25,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:02:25,009 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-13 05:02:25,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:25,010 INFO L225 Difference]: With dead ends: 72 [2020-10-13 05:02:25,011 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 05:02:25,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:02:25,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 05:02:25,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 33. [2020-10-13 05:02:25,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 05:02:25,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-13 05:02:25,022 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 27 [2020-10-13 05:02:25,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:25,023 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-13 05:02:25,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:02:25,023 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-13 05:02:25,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 05:02:25,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:25,027 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:25,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 05:02:25,027 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:25,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:25,028 INFO L82 PathProgramCache]: Analyzing trace with hash -411883739, now seen corresponding path program 10 times [2020-10-13 05:02:25,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:25,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720520769] [2020-10-13 05:02:25,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:25,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:25,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:25,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:25,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:27,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:27,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 05:02:27,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:27,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2523 [2020-10-13 05:02:27,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:27,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 05:02:27,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:02:27,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 05:02:27,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:27,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:27,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:27,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:27,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:27,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:27,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:27,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:02:27,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:27,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:27,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:27,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:27,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:27,683 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-13 05:02:27,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720520769] [2020-10-13 05:02:27,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:27,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 05:02:27,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609747135] [2020-10-13 05:02:27,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 05:02:27,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:27,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 05:02:27,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:02:27,687 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 11 states. [2020-10-13 05:02:27,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:27,835 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2020-10-13 05:02:27,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 05:02:27,836 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-13 05:02:27,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:27,837 INFO L225 Difference]: With dead ends: 59 [2020-10-13 05:02:27,837 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 05:02:27,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:02:27,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 05:02:27,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2020-10-13 05:02:27,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 05:02:27,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-13 05:02:27,848 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2020-10-13 05:02:27,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:27,849 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-13 05:02:27,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 05:02:27,849 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-13 05:02:27,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 05:02:27,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:27,852 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:27,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 05:02:27,853 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:27,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:27,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1209562039, now seen corresponding path program 11 times [2020-10-13 05:02:27,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:27,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359714461] [2020-10-13 05:02:27,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:27,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:27,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:27,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:28,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:30,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:30,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 05:02:30,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:30,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2419 [2020-10-13 05:02:30,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:30,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 05:02:30,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 05:02:30,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 05:02:30,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:30,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:30,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:30,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:30,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:30,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:30,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:30,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:02:30,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:30,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:30,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:30,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:30,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:30,403 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 05:02:30,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359714461] [2020-10-13 05:02:30,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:30,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 05:02:30,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818475082] [2020-10-13 05:02:30,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 05:02:30,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:30,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 05:02:30,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:02:30,406 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 11 states. [2020-10-13 05:02:30,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:30,570 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2020-10-13 05:02:30,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 05:02:30,571 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-13 05:02:30,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:30,572 INFO L225 Difference]: With dead ends: 69 [2020-10-13 05:02:30,572 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 05:02:30,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:02:30,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 05:02:30,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 35. [2020-10-13 05:02:30,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 05:02:30,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-13 05:02:30,584 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 30 [2020-10-13 05:02:30,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:30,585 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-13 05:02:30,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 05:02:30,586 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-13 05:02:30,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 05:02:30,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:30,586 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:30,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 05:02:30,587 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:30,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:30,587 INFO L82 PathProgramCache]: Analyzing trace with hash -959578330, now seen corresponding path program 12 times [2020-10-13 05:02:30,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:30,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501165796] [2020-10-13 05:02:30,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:30,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:30,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:30,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:31,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:33,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:33,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 05:02:33,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:33,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2789 [2020-10-13 05:02:33,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:33,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:02:33,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 05:02:33,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 05:02:33,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:33,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:33,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:33,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:33,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:33,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:33,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:33,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:02:33,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:33,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:33,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:33,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:33,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:33,497 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 05:02:33,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501165796] [2020-10-13 05:02:33,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:33,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:02:33,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407053054] [2020-10-13 05:02:33,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:02:33,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:33,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:02:33,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:02:33,500 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 12 states. [2020-10-13 05:02:33,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:33,686 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2020-10-13 05:02:33,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 05:02:33,687 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-10-13 05:02:33,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:33,688 INFO L225 Difference]: With dead ends: 84 [2020-10-13 05:02:33,688 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 05:02:33,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:02:33,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 05:02:33,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 37. [2020-10-13 05:02:33,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 05:02:33,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-13 05:02:33,705 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 31 [2020-10-13 05:02:33,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:33,706 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-13 05:02:33,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:02:33,707 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-13 05:02:33,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 05:02:33,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:33,709 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:33,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 05:02:33,711 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:33,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:33,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1380204475, now seen corresponding path program 13 times [2020-10-13 05:02:33,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:33,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542699035] [2020-10-13 05:02:33,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:33,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:33,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:33,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:34,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:36,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:36,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 05:02:36,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:36,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3229 [2020-10-13 05:02:36,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:36,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 05:02:36,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 05:02:36,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 05:02:36,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:37,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:37,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:37,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:37,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:37,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:37,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:37,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:02:37,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:37,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:37,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:37,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:37,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:37,068 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-13 05:02:37,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542699035] [2020-10-13 05:02:37,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:37,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 05:02:37,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143632069] [2020-10-13 05:02:37,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 05:02:37,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:37,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 05:02:37,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:02:37,070 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 13 states. [2020-10-13 05:02:37,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:37,274 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2020-10-13 05:02:37,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 05:02:37,274 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-13 05:02:37,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:37,276 INFO L225 Difference]: With dead ends: 90 [2020-10-13 05:02:37,276 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 05:02:37,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:02:37,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 05:02:37,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 39. [2020-10-13 05:02:37,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 05:02:37,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-13 05:02:37,283 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 33 [2020-10-13 05:02:37,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:37,283 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-13 05:02:37,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 05:02:37,283 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-13 05:02:37,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 05:02:37,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:37,284 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:37,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 05:02:37,284 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:37,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:37,284 INFO L82 PathProgramCache]: Analyzing trace with hash 2054257670, now seen corresponding path program 14 times [2020-10-13 05:02:37,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:37,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372121284] [2020-10-13 05:02:37,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:37,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:37,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:37,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:38,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:40,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:40,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 05:02:40,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:40,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3253 [2020-10-13 05:02:40,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:40,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:02:40,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:02:40,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 05:02:40,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:40,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:40,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:40,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:40,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:40,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:40,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:40,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:02:40,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:40,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:40,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:40,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:40,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:40,703 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-13 05:02:40,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372121284] [2020-10-13 05:02:40,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:40,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:02:40,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761060510] [2020-10-13 05:02:40,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:02:40,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:40,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:02:40,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:02:40,709 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 14 states. [2020-10-13 05:02:40,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:40,830 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2020-10-13 05:02:40,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:02:40,830 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-13 05:02:40,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:40,831 INFO L225 Difference]: With dead ends: 68 [2020-10-13 05:02:40,831 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 05:02:40,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:02:40,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 05:02:40,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-10-13 05:02:40,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 05:02:40,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-13 05:02:40,836 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 35 [2020-10-13 05:02:40,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:40,836 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-13 05:02:40,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:02:40,837 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-13 05:02:40,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 05:02:40,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:40,837 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:40,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 05:02:40,838 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:40,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:40,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1772516906, now seen corresponding path program 15 times [2020-10-13 05:02:40,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:40,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275427919] [2020-10-13 05:02:40,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:40,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:40,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:40,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:42,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:44,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:44,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 05:02:44,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:44,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3367 [2020-10-13 05:02:44,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:44,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:02:44,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 05:02:44,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 05:02:44,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:44,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:44,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:44,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:44,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:44,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:44,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:44,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:02:44,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:44,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:44,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:44,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:44,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:44,351 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-13 05:02:44,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275427919] [2020-10-13 05:02:44,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:44,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:02:44,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015587268] [2020-10-13 05:02:44,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:02:44,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:44,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:02:44,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:02:44,354 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 14 states. [2020-10-13 05:02:44,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:44,548 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2020-10-13 05:02:44,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:02:44,549 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-13 05:02:44,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:44,550 INFO L225 Difference]: With dead ends: 84 [2020-10-13 05:02:44,550 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 05:02:44,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:02:44,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 05:02:44,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 41. [2020-10-13 05:02:44,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 05:02:44,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-13 05:02:44,557 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 36 [2020-10-13 05:02:44,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:44,557 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-13 05:02:44,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:02:44,557 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-13 05:02:44,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 05:02:44,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:44,558 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:44,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 05:02:44,558 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:44,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:44,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1290555749, now seen corresponding path program 16 times [2020-10-13 05:02:44,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:44,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021693780] [2020-10-13 05:02:44,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:44,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:44,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:44,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:45,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:47,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:47,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 05:02:47,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:47,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3266 [2020-10-13 05:02:47,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:47,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 05:02:47,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:02:47,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 05:02:47,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:47,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:47,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:47,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:47,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:47,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:47,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:47,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:02:47,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:47,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:47,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:47,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:47,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:47,970 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-13 05:02:47,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021693780] [2020-10-13 05:02:47,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:47,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 05:02:47,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254313016] [2020-10-13 05:02:47,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 05:02:47,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:47,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 05:02:47,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:02:47,973 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 15 states. [2020-10-13 05:02:48,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:48,115 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2020-10-13 05:02:48,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 05:02:48,116 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-10-13 05:02:48,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:48,117 INFO L225 Difference]: With dead ends: 74 [2020-10-13 05:02:48,117 INFO L226 Difference]: Without dead ends: 51 [2020-10-13 05:02:48,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:02:48,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-13 05:02:48,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2020-10-13 05:02:48,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 05:02:48,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-10-13 05:02:48,123 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2020-10-13 05:02:48,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:48,123 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-10-13 05:02:48,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 05:02:48,123 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-10-13 05:02:48,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 05:02:48,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:48,124 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:48,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 05:02:48,124 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:48,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:48,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1120621193, now seen corresponding path program 17 times [2020-10-13 05:02:48,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:48,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54554811] [2020-10-13 05:02:48,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:48,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:48,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:48,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:49,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:51,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:51,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 05:02:51,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:51,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3731 [2020-10-13 05:02:51,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:51,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 05:02:51,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 05:02:51,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 05:02:51,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:51,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:52,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:52,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:52,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:52,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:52,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:52,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:02:52,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:52,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:52,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:52,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:52,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:52,005 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-10-13 05:02:52,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54554811] [2020-10-13 05:02:52,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:52,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 05:02:52,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819689865] [2020-10-13 05:02:52,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 05:02:52,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:52,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 05:02:52,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:02:52,007 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 15 states. [2020-10-13 05:02:52,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:52,246 INFO L93 Difference]: Finished difference Result 89 states and 104 transitions. [2020-10-13 05:02:52,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 05:02:52,246 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-13 05:02:52,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:52,248 INFO L225 Difference]: With dead ends: 89 [2020-10-13 05:02:52,248 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 05:02:52,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:02:52,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 05:02:52,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 43. [2020-10-13 05:02:52,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 05:02:52,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-13 05:02:52,254 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2020-10-13 05:02:52,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:52,255 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-13 05:02:52,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 05:02:52,255 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-13 05:02:52,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 05:02:52,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:52,255 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:52,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 05:02:52,256 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:52,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:52,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1738342170, now seen corresponding path program 18 times [2020-10-13 05:02:52,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:52,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543005188] [2020-10-13 05:02:52,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:52,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:52,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:52,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:54,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:57,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:57,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 05:02:57,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:57,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:02:57,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:57,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:02:57,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 05:02:57,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 05:02:57,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:57,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:57,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:57,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:57,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:57,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:57,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:57,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:02:57,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:57,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:57,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:57,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:57,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:57,426 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-10-13 05:02:57,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543005188] [2020-10-13 05:02:57,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:57,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:02:57,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391021289] [2020-10-13 05:02:57,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:02:57,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:57,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:02:57,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:02:57,428 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 16 states. [2020-10-13 05:02:57,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:57,712 INFO L93 Difference]: Finished difference Result 108 states and 126 transitions. [2020-10-13 05:02:57,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 05:02:57,712 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-13 05:02:57,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:57,713 INFO L225 Difference]: With dead ends: 108 [2020-10-13 05:02:57,713 INFO L226 Difference]: Without dead ends: 84 [2020-10-13 05:02:57,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:02:57,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-13 05:02:57,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 45. [2020-10-13 05:02:57,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 05:02:57,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-13 05:02:57,721 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 39 [2020-10-13 05:02:57,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:57,721 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-13 05:02:57,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:02:57,721 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-13 05:02:57,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 05:02:57,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:57,722 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:57,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 05:02:57,722 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:57,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:57,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1074190981, now seen corresponding path program 19 times [2020-10-13 05:02:57,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:57,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591489876] [2020-10-13 05:02:57,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:57,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:57,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:57,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:59,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:02,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:02,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 05:03:02,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:03:02,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:03:02,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:02,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 05:03:02,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:03:02,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 05:03:02,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:02,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:02,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:02,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:02,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:02,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:02,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:02,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:02,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:02,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:02,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:02,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:02,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:02,898 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-10-13 05:03:02,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591489876] [2020-10-13 05:03:02,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:02,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 05:03:02,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030981625] [2020-10-13 05:03:02,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 05:03:02,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:02,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 05:03:02,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:03:02,900 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 17 states. [2020-10-13 05:03:03,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:03,061 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2020-10-13 05:03:03,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 05:03:03,065 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-10-13 05:03:03,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:03,065 INFO L225 Difference]: With dead ends: 80 [2020-10-13 05:03:03,066 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 05:03:03,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:03:03,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 05:03:03,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-10-13 05:03:03,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 05:03:03,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-13 05:03:03,072 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 41 [2020-10-13 05:03:03,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:03,072 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-13 05:03:03,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 05:03:03,073 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-13 05:03:03,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 05:03:03,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:03,073 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:03:03,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 05:03:03,074 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:03,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:03,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1048095145, now seen corresponding path program 20 times [2020-10-13 05:03:03,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:03,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930861874] [2020-10-13 05:03:03,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:03,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:03,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:03,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:05,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:08,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:08,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 05:03:08,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:03:08,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 05:03:08,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:08,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 05:03:08,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 05:03:08,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 05:03:08,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:08,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:08,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:08,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:08,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:08,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:08,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:08,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:08,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:08,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:08,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:08,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:08,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:08,257 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-13 05:03:08,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930861874] [2020-10-13 05:03:08,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:08,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 05:03:08,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548423278] [2020-10-13 05:03:08,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 05:03:08,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:08,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 05:03:08,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:03:08,259 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 17 states. [2020-10-13 05:03:08,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:08,497 INFO L93 Difference]: Finished difference Result 99 states and 116 transitions. [2020-10-13 05:03:08,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 05:03:08,498 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-10-13 05:03:08,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:08,499 INFO L225 Difference]: With dead ends: 99 [2020-10-13 05:03:08,499 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 05:03:08,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:03:08,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 05:03:08,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 47. [2020-10-13 05:03:08,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 05:03:08,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-13 05:03:08,512 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 42 [2020-10-13 05:03:08,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:08,513 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-13 05:03:08,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 05:03:08,513 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-13 05:03:08,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 05:03:08,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:08,513 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:03:08,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 05:03:08,514 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:08,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:08,514 INFO L82 PathProgramCache]: Analyzing trace with hash 308317638, now seen corresponding path program 21 times [2020-10-13 05:03:08,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:08,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706971707] [2020-10-13 05:03:08,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:08,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:08,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:08,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:10,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:13,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:13,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 05:03:13,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:03:13,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 05:03:13,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:13,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:03:13,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:03:13,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 05:03:13,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:13,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:13,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:13,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:13,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:13,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:13,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:13,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:13,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:13,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:13,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:13,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:13,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:13,706 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-13 05:03:13,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706971707] [2020-10-13 05:03:13,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:13,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 05:03:13,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358291888] [2020-10-13 05:03:13,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 05:03:13,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:13,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 05:03:13,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:03:13,708 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 18 states. [2020-10-13 05:03:13,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:13,870 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2020-10-13 05:03:13,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 05:03:13,875 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 43 [2020-10-13 05:03:13,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:13,876 INFO L225 Difference]: With dead ends: 83 [2020-10-13 05:03:13,876 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 05:03:13,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:03:13,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 05:03:13,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2020-10-13 05:03:13,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 05:03:13,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-13 05:03:13,881 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 43 [2020-10-13 05:03:13,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:13,882 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-13 05:03:13,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 05:03:13,882 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-13 05:03:13,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 05:03:13,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:13,882 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:03:13,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 05:03:13,883 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:13,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:13,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1000023018, now seen corresponding path program 22 times [2020-10-13 05:03:13,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:13,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308683487] [2020-10-13 05:03:13,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:13,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:13,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:13,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:16,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:18,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:18,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 05:03:18,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:03:18,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:03:18,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:18,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:03:18,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 05:03:18,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 05:03:18,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:19,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:19,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:19,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:19,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:19,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:19,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:19,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:03:19,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:19,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:19,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:19,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:19,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:03:19,099 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-10-13 05:03:19,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308683487] [2020-10-13 05:03:19,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:19,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 05:03:19,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802990115] [2020-10-13 05:03:19,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 05:03:19,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:19,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 05:03:19,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:03:19,104 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 18 states. [2020-10-13 05:03:19,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:19,469 INFO L93 Difference]: Finished difference Result 104 states and 122 transitions. [2020-10-13 05:03:19,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 05:03:19,470 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-10-13 05:03:19,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:19,471 INFO L225 Difference]: With dead ends: 104 [2020-10-13 05:03:19,471 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 05:03:19,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:03:19,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 05:03:19,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 49. [2020-10-13 05:03:19,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 05:03:19,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-10-13 05:03:19,477 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 44 [2020-10-13 05:03:19,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:19,477 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-10-13 05:03:19,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 05:03:19,478 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-10-13 05:03:19,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 05:03:19,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:19,478 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:03:19,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 05:03:19,479 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:19,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:19,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1181918299, now seen corresponding path program 23 times [2020-10-13 05:03:19,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:19,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318504167] [2020-10-13 05:03:19,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:19,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:19,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:22,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:24,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:24,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 05:03:24,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:03:24,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 05:03:24,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:24,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 05:03:24,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:03:24,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 05:03:24,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:24,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:24,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:24,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:24,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:24,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:24,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:24,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:24,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:24,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:24,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:24,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:24,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:03:24,719 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-10-13 05:03:24,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318504167] [2020-10-13 05:03:24,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:24,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 05:03:24,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767956226] [2020-10-13 05:03:24,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 05:03:24,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:24,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 05:03:24,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 05:03:24,722 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 19 states. [2020-10-13 05:03:24,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:24,940 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2020-10-13 05:03:24,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 05:03:24,940 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2020-10-13 05:03:24,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:24,942 INFO L225 Difference]: With dead ends: 86 [2020-10-13 05:03:24,942 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 05:03:24,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 05:03:24,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 05:03:24,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2020-10-13 05:03:24,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-13 05:03:24,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-10-13 05:03:24,949 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 45 [2020-10-13 05:03:24,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:24,949 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-10-13 05:03:24,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 05:03:24,950 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-10-13 05:03:24,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 05:03:24,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:24,951 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:03:24,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 05:03:24,951 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:24,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:24,952 INFO L82 PathProgramCache]: Analyzing trace with hash 2121988297, now seen corresponding path program 24 times [2020-10-13 05:03:24,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:24,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366452517] [2020-10-13 05:03:24,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:24,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:24,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:25,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:28,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:29,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:29,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 05:03:29,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:03:29,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 05:03:29,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:29,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 05:03:29,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 05:03:29,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 05:03:29,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:30,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:30,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:30,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:30,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:30,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:30,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:30,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:30,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:30,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:30,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:30,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:30,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:30,152 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-10-13 05:03:30,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366452517] [2020-10-13 05:03:30,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:30,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 05:03:30,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770108365] [2020-10-13 05:03:30,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 05:03:30,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:30,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 05:03:30,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 05:03:30,154 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 19 states. [2020-10-13 05:03:30,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:30,485 INFO L93 Difference]: Finished difference Result 109 states and 128 transitions. [2020-10-13 05:03:30,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 05:03:30,486 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2020-10-13 05:03:30,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:30,488 INFO L225 Difference]: With dead ends: 109 [2020-10-13 05:03:30,488 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 05:03:30,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 05:03:30,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 05:03:30,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 51. [2020-10-13 05:03:30,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 05:03:30,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-13 05:03:30,505 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 46 [2020-10-13 05:03:30,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:30,506 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-13 05:03:30,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 05:03:30,506 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-13 05:03:30,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 05:03:30,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:30,508 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:03:30,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 05:03:30,509 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:30,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:30,509 INFO L82 PathProgramCache]: Analyzing trace with hash -760733018, now seen corresponding path program 25 times [2020-10-13 05:03:30,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:30,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878958644] [2020-10-13 05:03:30,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:30,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:30,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:30,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:34,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:35,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:35,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 05:03:35,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:03:35,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 05:03:35,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:35,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 05:03:35,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:03:35,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 05:03:35,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:35,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:35,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:35,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:35,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:35,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:35,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:35,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:03:35,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:35,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:35,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:35,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:35,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:35,749 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-10-13 05:03:35,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878958644] [2020-10-13 05:03:35,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:35,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 05:03:35,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710175478] [2020-10-13 05:03:35,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 05:03:35,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:35,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 05:03:35,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:03:35,752 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 20 states. [2020-10-13 05:03:35,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:35,919 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2020-10-13 05:03:35,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 05:03:35,919 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2020-10-13 05:03:35,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:35,920 INFO L225 Difference]: With dead ends: 92 [2020-10-13 05:03:35,920 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 05:03:35,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:03:35,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 05:03:35,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 52. [2020-10-13 05:03:35,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 05:03:35,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-13 05:03:35,925 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 47 [2020-10-13 05:03:35,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:35,925 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-13 05:03:35,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 05:03:35,925 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-13 05:03:35,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 05:03:35,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:35,926 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:03:35,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 05:03:35,927 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:35,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:35,927 INFO L82 PathProgramCache]: Analyzing trace with hash 312673994, now seen corresponding path program 26 times [2020-10-13 05:03:35,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:35,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127025766] [2020-10-13 05:03:35,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:35,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:36,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:39,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:40,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:40,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 05:03:40,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:03:40,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:03:40,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:40,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 05:03:40,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 05:03:40,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 05:03:40,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:41,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:41,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:41,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:41,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:41,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:41,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:41,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:41,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:41,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:41,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:41,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:41,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:41,154 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-10-13 05:03:41,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127025766] [2020-10-13 05:03:41,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:41,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 05:03:41,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699902680] [2020-10-13 05:03:41,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 05:03:41,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:41,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 05:03:41,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:03:41,155 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 20 states. [2020-10-13 05:03:41,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:41,478 INFO L93 Difference]: Finished difference Result 114 states and 134 transitions. [2020-10-13 05:03:41,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 05:03:41,478 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-10-13 05:03:41,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:41,480 INFO L225 Difference]: With dead ends: 114 [2020-10-13 05:03:41,480 INFO L226 Difference]: Without dead ends: 104 [2020-10-13 05:03:41,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:03:41,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-13 05:03:41,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 53. [2020-10-13 05:03:41,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 05:03:41,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-13 05:03:41,487 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 48 [2020-10-13 05:03:41,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:41,487 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-13 05:03:41,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 05:03:41,487 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-13 05:03:41,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 05:03:41,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:41,488 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:03:41,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 05:03:41,488 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:41,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:41,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1014901563, now seen corresponding path program 27 times [2020-10-13 05:03:41,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:41,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296306032] [2020-10-13 05:03:41,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:41,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:41,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:41,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:46,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:46,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:46,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 05:03:46,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:03:46,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 05:03:46,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:46,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 05:03:46,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 05:03:46,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 05:03:46,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:46,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:46,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:46,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:46,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:46,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:46,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:46,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:46,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:46,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:46,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:46,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:46,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:46,746 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-10-13 05:03:46,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296306032] [2020-10-13 05:03:46,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:46,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 05:03:46,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198398106] [2020-10-13 05:03:46,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 05:03:46,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:46,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 05:03:46,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:03:46,748 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 21 states. [2020-10-13 05:03:47,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:47,131 INFO L93 Difference]: Finished difference Result 138 states and 161 transitions. [2020-10-13 05:03:47,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 05:03:47,131 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 49 [2020-10-13 05:03:47,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:47,133 INFO L225 Difference]: With dead ends: 138 [2020-10-13 05:03:47,133 INFO L226 Difference]: Without dead ends: 109 [2020-10-13 05:03:47,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:03:47,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-13 05:03:47,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 55. [2020-10-13 05:03:47,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 05:03:47,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-13 05:03:47,140 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 49 [2020-10-13 05:03:47,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:47,140 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-13 05:03:47,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 05:03:47,140 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-13 05:03:47,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 05:03:47,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:47,141 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:03:47,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 05:03:47,141 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:47,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:47,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1678262394, now seen corresponding path program 28 times [2020-10-13 05:03:47,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:47,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106602259] [2020-10-13 05:03:47,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:47,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:47,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:47,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:52,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:52,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 05:03:52,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:03:52,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:03:52,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:52,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 05:03:52,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:03:52,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 05:03:52,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:52,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:52,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:52,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:52,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:52,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:52,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:52,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:52,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:52,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:52,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:52,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:52,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:52,410 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-10-13 05:03:52,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106602259] [2020-10-13 05:03:52,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:52,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 05:03:52,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698623091] [2020-10-13 05:03:52,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 05:03:52,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:52,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 05:03:52,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:03:52,412 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 22 states. [2020-10-13 05:03:52,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:52,547 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2020-10-13 05:03:52,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 05:03:52,547 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 51 [2020-10-13 05:03:52,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:52,548 INFO L225 Difference]: With dead ends: 98 [2020-10-13 05:03:52,548 INFO L226 Difference]: Without dead ends: 68 [2020-10-13 05:03:52,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:03:52,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-13 05:03:52,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2020-10-13 05:03:52,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 05:03:52,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-13 05:03:52,553 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 51 [2020-10-13 05:03:52,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:52,554 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-13 05:03:52,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 05:03:52,554 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-13 05:03:52,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 05:03:52,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:52,554 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:03:52,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 05:03:52,555 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:52,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:52,555 INFO L82 PathProgramCache]: Analyzing trace with hash -572788310, now seen corresponding path program 29 times [2020-10-13 05:03:52,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:52,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691355082] [2020-10-13 05:03:52,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:52,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:52,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:52,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:57,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:57,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 05:03:57,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:03:57,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 05:03:57,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:57,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 05:03:57,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 05:03:57,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 05:03:57,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:57,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:57,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:57,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:57,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:57,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:57,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:57,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:57,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:57,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:57,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:57,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:57,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-10-13 05:03:57,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691355082] [2020-10-13 05:03:57,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:57,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 05:03:57,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396341651] [2020-10-13 05:03:57,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 05:03:57,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:57,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 05:03:57,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:03:57,834 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 22 states. [2020-10-13 05:03:58,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:58,229 INFO L93 Difference]: Finished difference Result 124 states and 146 transitions. [2020-10-13 05:03:58,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 05:03:58,230 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-13 05:03:58,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:58,232 INFO L225 Difference]: With dead ends: 124 [2020-10-13 05:03:58,232 INFO L226 Difference]: Without dead ends: 114 [2020-10-13 05:03:58,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:03:58,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-13 05:03:58,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 57. [2020-10-13 05:03:58,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 05:03:58,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-13 05:03:58,237 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 52 [2020-10-13 05:03:58,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:58,238 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-13 05:03:58,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 05:03:58,238 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-13 05:03:58,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 05:03:58,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:58,239 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:03:58,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 05:03:58,239 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:58,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:58,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1600538085, now seen corresponding path program 30 times [2020-10-13 05:03:58,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:58,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683383565] [2020-10-13 05:03:58,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:58,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:58,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:58,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:03,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:03,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 05:04:03,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:04:03,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:04:03,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:03,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 05:04:03,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:04:03,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 05:04:03,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:03,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:04:03,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:03,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:03,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:03,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:04:03,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:03,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:04:03,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:03,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:03,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:03,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:03,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:03,524 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-10-13 05:04:03,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683383565] [2020-10-13 05:04:03,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:04:03,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 05:04:03,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648591351] [2020-10-13 05:04:03,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 05:04:03,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:04:03,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 05:04:03,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:04:03,526 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 23 states. [2020-10-13 05:04:03,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:04:03,685 INFO L93 Difference]: Finished difference Result 101 states and 109 transitions. [2020-10-13 05:04:03,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 05:04:03,685 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 53 [2020-10-13 05:04:03,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:04:03,686 INFO L225 Difference]: With dead ends: 101 [2020-10-13 05:04:03,686 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 05:04:03,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:04:03,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 05:04:03,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 58. [2020-10-13 05:04:03,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 05:04:03,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-13 05:04:03,693 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 53 [2020-10-13 05:04:03,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:04:03,693 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-13 05:04:03,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 05:04:03,693 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-13 05:04:03,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 05:04:03,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:04:03,694 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:04:03,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 05:04:03,695 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:04:03,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:04:03,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1190756599, now seen corresponding path program 31 times [2020-10-13 05:04:03,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:04:03,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079596720] [2020-10-13 05:04:03,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:04:03,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:03,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:03,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:08,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:08,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 05:04:08,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:04:08,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:04:08,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:08,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 05:04:08,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 05:04:08,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 05:04:08,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:08,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:04:08,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:08,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:08,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:08,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:04:08,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:08,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:04:08,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:08,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:08,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:08,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:08,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:08,992 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-13 05:04:08,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079596720] [2020-10-13 05:04:08,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:04:08,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 05:04:08,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385133656] [2020-10-13 05:04:08,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 05:04:08,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:04:08,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 05:04:08,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:04:08,994 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 23 states. [2020-10-13 05:04:09,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:04:09,427 INFO L93 Difference]: Finished difference Result 129 states and 152 transitions. [2020-10-13 05:04:09,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 05:04:09,427 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-10-13 05:04:09,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:04:09,429 INFO L225 Difference]: With dead ends: 129 [2020-10-13 05:04:09,429 INFO L226 Difference]: Without dead ends: 119 [2020-10-13 05:04:09,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:04:09,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-13 05:04:09,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 59. [2020-10-13 05:04:09,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 05:04:09,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-13 05:04:09,436 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 54 [2020-10-13 05:04:09,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:04:09,436 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-13 05:04:09,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 05:04:09,436 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-13 05:04:09,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 05:04:09,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:04:09,437 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:04:09,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 05:04:09,437 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:04:09,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:04:09,438 INFO L82 PathProgramCache]: Analyzing trace with hash -376609690, now seen corresponding path program 32 times [2020-10-13 05:04:09,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:04:09,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247541874] [2020-10-13 05:04:09,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:04:09,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:09,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:09,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:14,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:14,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 05:04:14,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:04:14,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:04:14,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:14,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 05:04:14,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:04:14,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 05:04:14,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:14,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:04:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:14,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:14,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:14,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:04:14,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:14,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:04:14,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:14,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:14,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:14,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:14,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:14,739 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-13 05:04:14,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247541874] [2020-10-13 05:04:14,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:04:14,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 05:04:14,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395489934] [2020-10-13 05:04:14,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 05:04:14,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:04:14,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 05:04:14,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:04:14,741 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 24 states. [2020-10-13 05:04:14,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:04:14,890 INFO L93 Difference]: Finished difference Result 104 states and 112 transitions. [2020-10-13 05:04:14,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 05:04:14,890 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 55 [2020-10-13 05:04:14,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:04:14,891 INFO L225 Difference]: With dead ends: 104 [2020-10-13 05:04:14,892 INFO L226 Difference]: Without dead ends: 72 [2020-10-13 05:04:14,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:04:14,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-13 05:04:14,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2020-10-13 05:04:14,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 05:04:14,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-13 05:04:14,897 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 55 [2020-10-13 05:04:14,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:04:14,898 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-13 05:04:14,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 05:04:14,898 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-13 05:04:14,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 05:04:14,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:04:14,899 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:04:14,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 05:04:14,899 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:04:14,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:04:14,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1543758986, now seen corresponding path program 33 times [2020-10-13 05:04:14,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:04:14,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759946416] [2020-10-13 05:04:14,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:04:14,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:14,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:15,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:19,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:19,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 05:04:19,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:04:19,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 05:04:19,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:19,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 05:04:19,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 05:04:19,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 05:04:19,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:20,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:04:20,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:20,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:20,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:20,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:04:20,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:20,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:04:20,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:20,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:20,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:20,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:20,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:20,226 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-10-13 05:04:20,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759946416] [2020-10-13 05:04:20,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:04:20,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 05:04:20,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715856905] [2020-10-13 05:04:20,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 05:04:20,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:04:20,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 05:04:20,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:04:20,228 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 24 states. [2020-10-13 05:04:20,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:04:20,593 INFO L93 Difference]: Finished difference Result 134 states and 158 transitions. [2020-10-13 05:04:20,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 05:04:20,594 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 56 [2020-10-13 05:04:20,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:04:20,596 INFO L225 Difference]: With dead ends: 134 [2020-10-13 05:04:20,596 INFO L226 Difference]: Without dead ends: 124 [2020-10-13 05:04:20,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:04:20,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-13 05:04:20,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 61. [2020-10-13 05:04:20,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 05:04:20,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2020-10-13 05:04:20,603 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 56 [2020-10-13 05:04:20,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:04:20,603 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2020-10-13 05:04:20,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 05:04:20,604 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2020-10-13 05:04:20,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 05:04:20,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:04:20,604 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:04:20,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 05:04:20,605 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:04:20,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:04:20,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1505972475, now seen corresponding path program 34 times [2020-10-13 05:04:20,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:04:20,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519209961] [2020-10-13 05:04:20,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:04:20,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:20,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:20,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:25,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:25,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 05:04:25,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:04:25,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-13 05:04:25,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:25,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 05:04:25,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 05:04:25,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 05:04:25,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:04:26,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:04:26,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:26,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:26,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:26,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:04:26,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:26,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:04:26,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:26,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:26,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:26,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:26,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:26,105 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-10-13 05:04:26,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519209961] [2020-10-13 05:04:26,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:04:26,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 05:04:26,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543260110] [2020-10-13 05:04:26,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 05:04:26,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:04:26,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 05:04:26,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:04:26,107 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 25 states. [2020-10-13 05:04:26,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:04:26,577 INFO L93 Difference]: Finished difference Result 162 states and 189 transitions. [2020-10-13 05:04:26,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 05:04:26,578 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2020-10-13 05:04:26,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:04:26,579 INFO L225 Difference]: With dead ends: 162 [2020-10-13 05:04:26,579 INFO L226 Difference]: Without dead ends: 129 [2020-10-13 05:04:26,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:04:26,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-13 05:04:26,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 63. [2020-10-13 05:04:26,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 05:04:26,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-10-13 05:04:26,591 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 57 [2020-10-13 05:04:26,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:04:26,592 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-10-13 05:04:26,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 05:04:26,592 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-10-13 05:04:26,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 05:04:26,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:04:26,593 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:04:26,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 05:04:26,593 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:04:26,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:04:26,593 INFO L82 PathProgramCache]: Analyzing trace with hash -819523258, now seen corresponding path program 35 times [2020-10-13 05:04:26,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:04:26,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676593322] [2020-10-13 05:04:26,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:04:26,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:26,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:26,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:31,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:31,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 05:04:31,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:04:31,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 05:04:31,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:31,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 05:04:31,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 05:04:31,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 05:04:31,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:31,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:04:31,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:31,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:31,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:31,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:04:31,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:31,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:04:31,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:31,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:31,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:31,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:31,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:31,970 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-10-13 05:04:31,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676593322] [2020-10-13 05:04:31,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:04:31,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 05:04:31,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711571596] [2020-10-13 05:04:31,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 05:04:31,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:04:31,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 05:04:31,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:04:31,972 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 26 states. [2020-10-13 05:04:32,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:04:32,358 INFO L93 Difference]: Finished difference Result 168 states and 196 transitions. [2020-10-13 05:04:32,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 05:04:32,359 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 59 [2020-10-13 05:04:32,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:04:32,360 INFO L225 Difference]: With dead ends: 168 [2020-10-13 05:04:32,360 INFO L226 Difference]: Without dead ends: 134 [2020-10-13 05:04:32,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:04:32,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-13 05:04:32,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 65. [2020-10-13 05:04:32,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 05:04:32,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-13 05:04:32,368 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 59 [2020-10-13 05:04:32,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:04:32,368 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-13 05:04:32,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 05:04:32,368 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-13 05:04:32,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 05:04:32,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:04:32,369 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:04:32,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 05:04:32,369 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:04:32,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:04:32,370 INFO L82 PathProgramCache]: Analyzing trace with hash -393801691, now seen corresponding path program 36 times [2020-10-13 05:04:32,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:04:32,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769430927] [2020-10-13 05:04:32,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:04:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:32,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:32,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:37,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:37,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 05:04:37,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:04:37,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 05:04:37,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:37,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 05:04:37,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:04:37,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 05:04:37,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:37,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:04:37,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:37,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:37,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:37,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:04:37,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:37,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:04:37,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:37,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:37,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:37,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:37,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:37,771 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-10-13 05:04:37,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769430927] [2020-10-13 05:04:37,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:04:37,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 05:04:37,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239256059] [2020-10-13 05:04:37,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 05:04:37,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:04:37,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 05:04:37,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 05:04:37,773 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 27 states. [2020-10-13 05:04:37,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:04:37,961 INFO L93 Difference]: Finished difference Result 116 states and 125 transitions. [2020-10-13 05:04:37,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 05:04:37,961 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 61 [2020-10-13 05:04:37,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:04:37,962 INFO L225 Difference]: With dead ends: 116 [2020-10-13 05:04:37,962 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 05:04:37,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 05:04:37,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 05:04:37,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 66. [2020-10-13 05:04:37,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 05:04:37,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-10-13 05:04:37,967 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 61 [2020-10-13 05:04:37,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:04:37,968 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-10-13 05:04:37,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 05:04:37,968 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-10-13 05:04:37,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 05:04:37,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:04:37,969 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:04:37,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 05:04:37,969 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:04:37,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:04:37,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1199708855, now seen corresponding path program 37 times [2020-10-13 05:04:37,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:04:37,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760879812] [2020-10-13 05:04:37,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:04:37,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:38,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:38,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:42,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:42,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 05:04:42,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:04:42,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 05:04:42,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:42,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 05:04:42,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 05:04:42,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 05:04:42,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:43,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:04:43,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:43,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:43,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:43,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:04:43,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:43,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:04:43,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:43,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:43,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:43,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:43,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:43,374 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-10-13 05:04:43,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760879812] [2020-10-13 05:04:43,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:04:43,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 05:04:43,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051735188] [2020-10-13 05:04:43,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 05:04:43,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:04:43,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 05:04:43,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 05:04:43,377 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 27 states. [2020-10-13 05:04:43,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:04:43,903 INFO L93 Difference]: Finished difference Result 149 states and 176 transitions. [2020-10-13 05:04:43,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 05:04:43,903 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 62 [2020-10-13 05:04:43,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:04:43,905 INFO L225 Difference]: With dead ends: 149 [2020-10-13 05:04:43,905 INFO L226 Difference]: Without dead ends: 139 [2020-10-13 05:04:43,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 05:04:43,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-13 05:04:43,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 67. [2020-10-13 05:04:43,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 05:04:43,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-10-13 05:04:43,912 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 62 [2020-10-13 05:04:43,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:04:43,912 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-10-13 05:04:43,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 05:04:43,912 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-10-13 05:04:43,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 05:04:43,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:04:43,913 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:04:43,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 05:04:43,914 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:04:43,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:04:43,914 INFO L82 PathProgramCache]: Analyzing trace with hash -654129626, now seen corresponding path program 38 times [2020-10-13 05:04:43,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:04:43,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595563724] [2020-10-13 05:04:43,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:04:43,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:43,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:44,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:48,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:48,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 05:04:48,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:04:48,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 05:04:48,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:48,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 05:04:48,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 05:04:48,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 05:04:48,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:49,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:04:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:49,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:49,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:49,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:04:49,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:49,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:04:49,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:49,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:49,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:49,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:49,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:49,351 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-10-13 05:04:49,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595563724] [2020-10-13 05:04:49,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:04:49,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 05:04:49,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491541619] [2020-10-13 05:04:49,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 05:04:49,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:04:49,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 05:04:49,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 05:04:49,354 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 28 states. [2020-10-13 05:04:49,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:04:49,783 INFO L93 Difference]: Finished difference Result 180 states and 210 transitions. [2020-10-13 05:04:49,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 05:04:49,783 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 63 [2020-10-13 05:04:49,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:04:49,785 INFO L225 Difference]: With dead ends: 180 [2020-10-13 05:04:49,785 INFO L226 Difference]: Without dead ends: 144 [2020-10-13 05:04:49,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 05:04:49,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-13 05:04:49,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 69. [2020-10-13 05:04:49,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 05:04:49,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-13 05:04:49,796 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 63 [2020-10-13 05:04:49,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:04:49,796 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-13 05:04:49,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 05:04:49,796 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-13 05:04:49,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 05:04:49,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:04:49,797 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:04:49,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 05:04:49,797 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:04:49,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:04:49,798 INFO L82 PathProgramCache]: Analyzing trace with hash -834180795, now seen corresponding path program 39 times [2020-10-13 05:04:49,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:04:49,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058788557] [2020-10-13 05:04:49,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:04:49,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:49,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:50,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:54,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:54,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 05:04:54,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:04:54,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 05:04:54,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:54,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 05:04:54,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-13 05:04:54,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 05:04:54,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:55,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:04:55,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:55,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:55,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:55,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:04:55,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:55,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:04:55,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:55,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:55,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:55,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:55,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:55,267 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-10-13 05:04:55,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058788557] [2020-10-13 05:04:55,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:04:55,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 05:04:55,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318725056] [2020-10-13 05:04:55,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 05:04:55,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:04:55,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 05:04:55,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:04:55,269 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 29 states. [2020-10-13 05:04:55,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:04:55,875 INFO L93 Difference]: Finished difference Result 186 states and 217 transitions. [2020-10-13 05:04:55,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 05:04:55,876 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 65 [2020-10-13 05:04:55,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:04:55,877 INFO L225 Difference]: With dead ends: 186 [2020-10-13 05:04:55,878 INFO L226 Difference]: Without dead ends: 149 [2020-10-13 05:04:55,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:04:55,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-13 05:04:55,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 71. [2020-10-13 05:04:55,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 05:04:55,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-13 05:04:55,885 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 65 [2020-10-13 05:04:55,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:04:55,885 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-13 05:04:55,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 05:04:55,885 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-13 05:04:55,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 05:04:55,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:04:55,886 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:04:55,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 05:04:55,886 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:04:55,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:04:55,887 INFO L82 PathProgramCache]: Analyzing trace with hash -337739002, now seen corresponding path program 40 times [2020-10-13 05:04:55,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:04:55,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868466359] [2020-10-13 05:04:55,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:04:55,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:55,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:56,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:00,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:00,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 05:05:00,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:05:00,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 05:05:00,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:00,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 05:05:00,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 05:05:00,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 05:05:00,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:01,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:05:01,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:01,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:01,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:01,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:05:01,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:05:01,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:05:01,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:01,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:05:01,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:05:01,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:05:01,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:01,369 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-10-13 05:05:01,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868466359] [2020-10-13 05:05:01,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:05:01,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 05:05:01,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223295480] [2020-10-13 05:05:01,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 05:05:01,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:05:01,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 05:05:01,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 05:05:01,371 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 30 states. [2020-10-13 05:05:01,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:05:01,874 INFO L93 Difference]: Finished difference Result 192 states and 224 transitions. [2020-10-13 05:05:01,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 05:05:01,875 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 67 [2020-10-13 05:05:01,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:05:01,876 INFO L225 Difference]: With dead ends: 192 [2020-10-13 05:05:01,877 INFO L226 Difference]: Without dead ends: 154 [2020-10-13 05:05:01,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 05:05:01,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-13 05:05:01,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 73. [2020-10-13 05:05:01,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 05:05:01,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-10-13 05:05:01,887 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 67 [2020-10-13 05:05:01,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:05:01,888 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-10-13 05:05:01,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 05:05:01,889 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-10-13 05:05:01,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 05:05:01,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:05:01,890 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:05:01,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 05:05:01,890 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:05:01,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:05:01,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1996470885, now seen corresponding path program 41 times [2020-10-13 05:05:01,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:05:01,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689307379] [2020-10-13 05:05:01,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:05:01,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:01,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:02,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:06,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:06,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 05:05:06,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:05:06,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 05:05:06,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:06,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 05:05:06,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-13 05:05:06,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 05:05:06,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:07,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:05:07,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:07,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:07,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:07,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:05:07,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:05:07,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:05:07,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:07,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:05:07,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:05:07,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:05:07,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:07,414 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-10-13 05:05:07,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689307379] [2020-10-13 05:05:07,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:05:07,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 05:05:07,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494409366] [2020-10-13 05:05:07,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 05:05:07,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:05:07,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 05:05:07,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 05:05:07,416 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 31 states. [2020-10-13 05:05:07,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:05:07,927 INFO L93 Difference]: Finished difference Result 198 states and 231 transitions. [2020-10-13 05:05:07,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 05:05:07,928 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 69 [2020-10-13 05:05:07,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:05:07,929 INFO L225 Difference]: With dead ends: 198 [2020-10-13 05:05:07,929 INFO L226 Difference]: Without dead ends: 159 [2020-10-13 05:05:07,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 05:05:07,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-13 05:05:07,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 75. [2020-10-13 05:05:07,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 05:05:07,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-10-13 05:05:07,942 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 69 [2020-10-13 05:05:07,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:05:07,942 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-10-13 05:05:07,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 05:05:07,943 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-10-13 05:05:07,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 05:05:07,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:05:07,943 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:05:07,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 05:05:07,944 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:05:07,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:05:07,944 INFO L82 PathProgramCache]: Analyzing trace with hash 620251110, now seen corresponding path program 42 times [2020-10-13 05:05:07,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:05:07,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858895735] [2020-10-13 05:05:07,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:05:07,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:07,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:08,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:12,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:12,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 05:05:12,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:05:12,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-13 05:05:12,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:12,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 05:05:12,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 05:05:12,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 05:05:12,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:13,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:05:13,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:13,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:13,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:13,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:05:13,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:05:13,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:05:13,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:13,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:05:13,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:05:13,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:05:13,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:13,506 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2020-10-13 05:05:13,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858895735] [2020-10-13 05:05:13,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:05:13,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 05:05:13,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632789006] [2020-10-13 05:05:13,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 05:05:13,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:05:13,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 05:05:13,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 05:05:13,509 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 32 states. [2020-10-13 05:05:14,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:05:14,170 INFO L93 Difference]: Finished difference Result 204 states and 238 transitions. [2020-10-13 05:05:14,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 05:05:14,171 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 71 [2020-10-13 05:05:14,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:05:14,172 INFO L225 Difference]: With dead ends: 204 [2020-10-13 05:05:14,173 INFO L226 Difference]: Without dead ends: 164 [2020-10-13 05:05:14,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 05:05:14,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-13 05:05:14,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 77. [2020-10-13 05:05:14,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-13 05:05:14,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-10-13 05:05:14,181 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 71 [2020-10-13 05:05:14,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:05:14,181 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-10-13 05:05:14,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 05:05:14,181 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-10-13 05:05:14,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 05:05:14,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:05:14,182 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:05:14,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 05:05:14,182 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:05:14,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:05:14,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1716386939, now seen corresponding path program 43 times [2020-10-13 05:05:14,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:05:14,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155778046] [2020-10-13 05:05:14,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:05:14,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:14,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:14,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:19,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:19,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 05:05:19,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:05:19,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 05:05:19,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:19,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 05:05:19,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:05:19,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 05:05:19,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:19,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:05:19,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:19,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:19,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:19,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:05:19,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:05:19,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:05:19,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:19,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:05:19,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:05:19,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:05:19,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:19,773 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2020-10-13 05:05:19,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155778046] [2020-10-13 05:05:19,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:05:19,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 05:05:19,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126479107] [2020-10-13 05:05:19,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 05:05:19,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:05:19,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 05:05:19,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 05:05:19,775 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 33 states. [2020-10-13 05:05:20,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:05:20,081 INFO L93 Difference]: Finished difference Result 137 states and 147 transitions. [2020-10-13 05:05:20,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 05:05:20,082 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 73 [2020-10-13 05:05:20,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:05:20,083 INFO L225 Difference]: With dead ends: 137 [2020-10-13 05:05:20,083 INFO L226 Difference]: Without dead ends: 96 [2020-10-13 05:05:20,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 05:05:20,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-13 05:05:20,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 78. [2020-10-13 05:05:20,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-13 05:05:20,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-10-13 05:05:20,090 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 73 [2020-10-13 05:05:20,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:05:20,091 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-10-13 05:05:20,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 05:05:20,091 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-10-13 05:05:20,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 05:05:20,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:05:20,092 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:05:20,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 05:05:20,092 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:05:20,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:05:20,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1216462167, now seen corresponding path program 44 times [2020-10-13 05:05:20,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:05:20,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300027268] [2020-10-13 05:05:20,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:05:20,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:20,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:20,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:25,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:25,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 05:05:25,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:05:25,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 05:05:25,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:25,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 05:05:25,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 05:05:25,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 05:05:25,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:25,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:05:25,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:25,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:25,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:25,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:05:25,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:05:25,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:05:25,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:25,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:05:25,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:05:25,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:05:25,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:25,672 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2020-10-13 05:05:25,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300027268] [2020-10-13 05:05:25,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:05:25,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 05:05:25,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841970206] [2020-10-13 05:05:25,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 05:05:25,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:05:25,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 05:05:25,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 05:05:25,674 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 33 states. [2020-10-13 05:05:26,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:05:26,436 INFO L93 Difference]: Finished difference Result 179 states and 212 transitions. [2020-10-13 05:05:26,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 05:05:26,437 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 74 [2020-10-13 05:05:26,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:05:26,439 INFO L225 Difference]: With dead ends: 179 [2020-10-13 05:05:26,439 INFO L226 Difference]: Without dead ends: 169 [2020-10-13 05:05:26,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 05:05:26,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-13 05:05:26,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 79. [2020-10-13 05:05:26,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 05:05:26,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-10-13 05:05:26,448 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 74 [2020-10-13 05:05:26,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:05:26,449 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-10-13 05:05:26,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 05:05:26,449 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-10-13 05:05:26,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 05:05:26,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:05:26,450 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:05:26,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 05:05:26,450 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:05:26,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:05:26,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1173482298, now seen corresponding path program 45 times [2020-10-13 05:05:26,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:05:26,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065740210] [2020-10-13 05:05:26,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:05:26,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:26,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:26,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:31,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:31,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 05:05:31,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:05:31,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-13 05:05:31,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:31,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 05:05:31,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 05:05:31,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 05:05:31,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:32,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:05:32,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:32,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:32,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:32,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:05:32,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:05:32,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:05:32,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:32,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:05:32,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:05:32,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:05:32,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:32,101 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2020-10-13 05:05:32,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065740210] [2020-10-13 05:05:32,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:05:32,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 05:05:32,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359667662] [2020-10-13 05:05:32,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 05:05:32,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:05:32,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 05:05:32,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 05:05:32,103 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 34 states. [2020-10-13 05:05:32,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:05:32,759 INFO L93 Difference]: Finished difference Result 216 states and 252 transitions. [2020-10-13 05:05:32,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 05:05:32,760 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 75 [2020-10-13 05:05:32,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:05:32,762 INFO L225 Difference]: With dead ends: 216 [2020-10-13 05:05:32,762 INFO L226 Difference]: Without dead ends: 174 [2020-10-13 05:05:32,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 05:05:32,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-13 05:05:32,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 81. [2020-10-13 05:05:32,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 05:05:32,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-10-13 05:05:32,775 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 75 [2020-10-13 05:05:32,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:05:32,775 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-10-13 05:05:32,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 05:05:32,776 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-10-13 05:05:32,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 05:05:32,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:05:32,777 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:05:32,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 05:05:32,778 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:05:32,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:05:32,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1528806235, now seen corresponding path program 46 times [2020-10-13 05:05:32,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:05:32,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820067881] [2020-10-13 05:05:32,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:05:32,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:32,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:33,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:37,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:37,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 05:05:37,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:05:37,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-13 05:05:37,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:37,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 05:05:37,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:05:37,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 05:05:37,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:38,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:05:38,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:38,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:38,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:38,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:05:38,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:05:38,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:05:38,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:38,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:05:38,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:05:38,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:05:38,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:38,528 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2020-10-13 05:05:38,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820067881] [2020-10-13 05:05:38,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:05:38,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 05:05:38,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502299994] [2020-10-13 05:05:38,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 05:05:38,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:05:38,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 05:05:38,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 05:05:38,530 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 35 states. [2020-10-13 05:05:38,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:05:38,830 INFO L93 Difference]: Finished difference Result 146 states and 157 transitions. [2020-10-13 05:05:38,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 05:05:38,830 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 77 [2020-10-13 05:05:38,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:05:38,831 INFO L225 Difference]: With dead ends: 146 [2020-10-13 05:05:38,832 INFO L226 Difference]: Without dead ends: 103 [2020-10-13 05:05:38,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 05:05:38,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-13 05:05:38,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-10-13 05:05:38,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 05:05:38,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-10-13 05:05:38,838 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 77 [2020-10-13 05:05:38,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:05:38,838 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-10-13 05:05:38,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 05:05:38,839 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-10-13 05:05:38,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 05:05:38,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:05:38,840 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:05:38,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 05:05:38,840 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:05:38,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:05:38,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1987072457, now seen corresponding path program 47 times [2020-10-13 05:05:38,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:05:38,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482815965] [2020-10-13 05:05:38,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:05:38,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:38,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:39,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:43,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:43,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 05:05:43,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:05:43,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 05:05:43,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:43,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 05:05:43,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 05:05:43,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 05:05:43,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:44,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:05:44,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:44,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:44,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:44,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:05:44,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:05:44,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:05:44,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:44,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:05:44,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:05:44,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:05:44,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:44,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2020-10-13 05:05:44,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482815965] [2020-10-13 05:05:44,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:05:44,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 05:05:44,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695760754] [2020-10-13 05:05:44,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 05:05:44,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:05:44,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 05:05:44,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 05:05:44,522 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 35 states. [2020-10-13 05:05:45,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:05:45,274 INFO L93 Difference]: Finished difference Result 189 states and 224 transitions. [2020-10-13 05:05:45,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 05:05:45,275 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 78 [2020-10-13 05:05:45,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:05:45,277 INFO L225 Difference]: With dead ends: 189 [2020-10-13 05:05:45,277 INFO L226 Difference]: Without dead ends: 179 [2020-10-13 05:05:45,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 05:05:45,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-13 05:05:45,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 83. [2020-10-13 05:05:45,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 05:05:45,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-13 05:05:45,284 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 78 [2020-10-13 05:05:45,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:05:45,284 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-13 05:05:45,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 05:05:45,284 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-13 05:05:45,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 05:05:45,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:05:45,285 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:05:45,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 05:05:45,285 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:05:45,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:05:45,286 INFO L82 PathProgramCache]: Analyzing trace with hash -648156762, now seen corresponding path program 48 times [2020-10-13 05:05:45,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:05:45,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257469954] [2020-10-13 05:05:45,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:05:45,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:45,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:45,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:50,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:50,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 05:05:50,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:05:50,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-13 05:05:50,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:50,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 05:05:50,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 05:05:50,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 05:05:50,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:50,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:05:50,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:50,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:51,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:51,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:05:51,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:05:51,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:05:51,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:51,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:05:51,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:05:51,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:05:51,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:51,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2020-10-13 05:05:51,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257469954] [2020-10-13 05:05:51,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:05:51,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 05:05:51,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346744464] [2020-10-13 05:05:51,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 05:05:51,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:05:51,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 05:05:51,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 05:05:51,007 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 36 states. [2020-10-13 05:05:51,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:05:51,836 INFO L93 Difference]: Finished difference Result 228 states and 266 transitions. [2020-10-13 05:05:51,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 05:05:51,837 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 79 [2020-10-13 05:05:51,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:05:51,838 INFO L225 Difference]: With dead ends: 228 [2020-10-13 05:05:51,838 INFO L226 Difference]: Without dead ends: 184 [2020-10-13 05:05:51,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 05:05:51,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-13 05:05:51,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 85. [2020-10-13 05:05:51,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-13 05:05:51,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-10-13 05:05:51,854 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 79 [2020-10-13 05:05:51,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:05:51,855 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-10-13 05:05:51,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 05:05:51,855 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-10-13 05:05:51,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 05:05:51,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:05:51,856 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:05:51,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-13 05:05:51,857 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:05:51,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:05:51,857 INFO L82 PathProgramCache]: Analyzing trace with hash -561218107, now seen corresponding path program 49 times [2020-10-13 05:05:51,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:05:51,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275733994] [2020-10-13 05:05:51,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:05:51,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:51,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:52,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:56,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:56,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 05:05:56,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:05:56,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-13 05:05:56,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:56,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 05:05:56,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:05:56,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 05:05:56,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:57,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:05:57,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:57,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:57,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:57,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:05:57,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:05:57,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:05:57,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:57,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:05:57,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:05:57,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:05:57,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:57,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2020-10-13 05:05:57,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275733994] [2020-10-13 05:05:57,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:05:57,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 05:05:57,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54707839] [2020-10-13 05:05:57,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 05:05:57,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:05:57,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 05:05:57,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 05:05:57,617 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 37 states. [2020-10-13 05:05:57,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:05:57,858 INFO L93 Difference]: Finished difference Result 152 states and 163 transitions. [2020-10-13 05:05:57,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 05:05:57,858 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 81 [2020-10-13 05:05:57,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:05:57,859 INFO L225 Difference]: With dead ends: 152 [2020-10-13 05:05:57,859 INFO L226 Difference]: Without dead ends: 107 [2020-10-13 05:05:57,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 05:05:57,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-13 05:05:57,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 86. [2020-10-13 05:05:57,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-13 05:05:57,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-10-13 05:05:57,864 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 81 [2020-10-13 05:05:57,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:05:57,865 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-10-13 05:05:57,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 05:05:57,865 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-10-13 05:05:57,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 05:05:57,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:05:57,866 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:05:57,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-13 05:05:57,866 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:05:57,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:05:57,866 INFO L82 PathProgramCache]: Analyzing trace with hash 558455017, now seen corresponding path program 50 times [2020-10-13 05:05:57,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:05:57,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150405337] [2020-10-13 05:05:57,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:05:57,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:57,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:00,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:02,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:02,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 05:06:02,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:06:02,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:06:02,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:02,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 05:06:02,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-13 05:06:02,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 05:06:02,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:03,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:06:03,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:03,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:03,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:03,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:06:03,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:03,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:03,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:03,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:03,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:03,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:03,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:03,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2020-10-13 05:06:03,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150405337] [2020-10-13 05:06:03,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:06:03,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 05:06:03,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207690567] [2020-10-13 05:06:03,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 05:06:03,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:06:03,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 05:06:03,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 05:06:03,555 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 37 states. [2020-10-13 05:06:04,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:06:04,419 INFO L93 Difference]: Finished difference Result 199 states and 236 transitions. [2020-10-13 05:06:04,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 05:06:04,419 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 82 [2020-10-13 05:06:04,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:06:04,421 INFO L225 Difference]: With dead ends: 199 [2020-10-13 05:06:04,421 INFO L226 Difference]: Without dead ends: 189 [2020-10-13 05:06:04,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 05:06:04,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-13 05:06:04,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 87. [2020-10-13 05:06:04,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-13 05:06:04,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-10-13 05:06:04,432 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 82 [2020-10-13 05:06:04,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:06:04,433 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-10-13 05:06:04,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 05:06:04,433 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-10-13 05:06:04,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 05:06:04,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:06:04,433 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:06:04,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-13 05:06:04,434 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:06:04,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:06:04,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1985624442, now seen corresponding path program 51 times [2020-10-13 05:06:04,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:06:04,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049344048] [2020-10-13 05:06:04,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:06:04,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:04,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:07,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:09,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking...