/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_init8_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:54:12,065 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:54:12,068 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:54:12,098 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:54:12,098 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:54:12,106 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:54:12,108 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:54:12,110 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:54:12,113 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:54:12,114 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:54:12,116 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:54:12,118 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:54:12,118 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:54:12,121 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:54:12,123 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:54:12,124 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:54:12,125 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:54:12,129 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:54:12,130 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:54:12,136 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:54:12,138 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:54:12,142 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:54:12,144 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:54:12,144 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:54:12,148 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:54:12,148 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:54:12,148 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:54:12,151 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:54:12,151 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:54:12,162 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:54:12,162 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:54:12,163 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:54:12,163 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:54:12,165 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:54:12,166 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:54:12,166 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:54:12,167 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:54:12,167 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:54:12,167 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:54:12,168 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:54:12,169 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:54:12,170 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 04:54:12,208 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:54:12,208 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:54:12,210 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:54:12,210 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:54:12,210 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:54:12,211 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:54:12,211 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:54:12,211 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:54:12,212 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:54:12,212 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:54:12,213 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:54:12,213 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:54:12,213 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:54:12,213 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:54:12,214 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:54:12,214 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:54:12,214 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:54:12,214 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:54:12,214 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:54:12,215 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:54:12,215 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:54:12,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:54:12,215 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:54:12,215 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:54:12,216 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:54:12,216 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:54:12,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:54:12,216 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:54:12,216 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:54:12,217 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 04:54:12,553 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:54:12,570 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:54:12,573 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:54:12,575 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:54:12,575 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:54:12,576 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init8_ground-1.i [2020-10-13 04:54:12,637 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d5ba17759/8c2a2226052540a78243886c03dc941b/FLAG696b9f615 [2020-10-13 04:54:13,122 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:54:13,123 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init8_ground-1.i [2020-10-13 04:54:13,129 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d5ba17759/8c2a2226052540a78243886c03dc941b/FLAG696b9f615 [2020-10-13 04:54:13,518 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d5ba17759/8c2a2226052540a78243886c03dc941b [2020-10-13 04:54:13,527 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:54:13,528 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:54:13,529 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:54:13,530 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:54:13,533 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:54:13,534 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:54:13" (1/1) ... [2020-10-13 04:54:13,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54001c19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:13, skipping insertion in model container [2020-10-13 04:54:13,538 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:54:13" (1/1) ... [2020-10-13 04:54:13,545 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:54:13,565 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:54:13,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:54:13,745 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:54:13,771 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:54:13,871 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:54:13,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:13 WrapperNode [2020-10-13 04:54:13,872 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:54:13,873 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:54:13,873 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:54:13,873 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:54:13,884 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:13" (1/1) ... [2020-10-13 04:54:13,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:13" (1/1) ... [2020-10-13 04:54:13,893 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:13" (1/1) ... [2020-10-13 04:54:13,893 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:13" (1/1) ... [2020-10-13 04:54:13,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:13" (1/1) ... [2020-10-13 04:54:13,914 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:13" (1/1) ... [2020-10-13 04:54:13,916 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:13" (1/1) ... [2020-10-13 04:54:13,918 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:54:13,918 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:54:13,919 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:54:13,919 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:54:13,920 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:13" (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 04:54:13,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:54:13,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:54:13,978 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 04:54:13,979 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:54:13,979 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:54:13,979 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:54:13,979 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:54:13,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 04:54:13,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:54:13,980 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:54:13,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:54:13,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:54:13,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:54:14,255 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:54:14,256 INFO L295 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-13 04:54:14,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:54:14 BoogieIcfgContainer [2020-10-13 04:54:14,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:54:14,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:54:14,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:54:14,268 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:54:14,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:54:13" (1/3) ... [2020-10-13 04:54:14,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@288bf76b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:54:14, skipping insertion in model container [2020-10-13 04:54:14,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:13" (2/3) ... [2020-10-13 04:54:14,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@288bf76b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:54:14, skipping insertion in model container [2020-10-13 04:54:14,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:54:14" (3/3) ... [2020-10-13 04:54:14,271 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init8_ground-1.i [2020-10-13 04:54:14,285 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:54:14,296 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:54:14,311 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:54:14,343 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:54:14,344 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:54:14,344 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:54:14,344 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:54:14,344 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:54:14,344 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:54:14,345 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:54:14,345 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:54:14,366 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-13 04:54:14,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 04:54:14,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:14,375 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:14,375 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:14,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:14,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1916738342, now seen corresponding path program 1 times [2020-10-13 04:54:14,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:14,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401461789] [2020-10-13 04:54:14,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:14,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:14,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:14,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:14,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:14,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:14,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:14,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:14,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:14,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:16,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:16,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 04:54:16,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 04:54:16,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1909 [2020-10-13 04:54:16,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:16,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:16,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:54:16,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:16,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 04:54:16,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:16,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:16,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:16,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:16,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:16,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:16,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:54:16,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:16,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:16,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:16,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:16,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:54:16,499 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 04:54:16,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401461789] [2020-10-13 04:54:16,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:54:16,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 04:54:16,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316936776] [2020-10-13 04:54:16,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 04:54:16,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:16,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 04:54:16,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:54:16,527 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-10-13 04:54:16,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:16,644 INFO L93 Difference]: Finished difference Result 67 states and 102 transitions. [2020-10-13 04:54:16,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 04:54:16,646 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-10-13 04:54:16,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:16,655 INFO L225 Difference]: With dead ends: 67 [2020-10-13 04:54:16,655 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 04:54:16,659 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 04:54:16,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 04:54:16,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-13 04:54:16,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 04:54:16,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2020-10-13 04:54:16,703 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 27 [2020-10-13 04:54:16,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:16,704 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2020-10-13 04:54:16,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 04:54:16,704 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2020-10-13 04:54:16,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 04:54:16,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:16,706 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:16,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:54:16,706 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:16,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:16,707 INFO L82 PathProgramCache]: Analyzing trace with hash -330794466, now seen corresponding path program 1 times [2020-10-13 04:54:16,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:16,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159432498] [2020-10-13 04:54:16,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:16,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:16,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:16,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:16,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:16,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:16,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:16,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:16,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:16,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:20,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:20,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 04:54:20,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 04:54:20,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3414 [2020-10-13 04:54:20,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:20,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:54:20,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 04:54:20,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:54:20,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:54:20,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:20,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:20,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:20,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:20,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:20,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:20,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:54:20,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:20,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:20,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:20,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:20,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:20,172 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 04:54:20,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159432498] [2020-10-13 04:54:20,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:54:20,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:54:20,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316793369] [2020-10-13 04:54:20,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:54:20,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:20,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:54:20,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:54:20,177 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 4 states. [2020-10-13 04:54:20,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:20,323 INFO L93 Difference]: Finished difference Result 65 states and 88 transitions. [2020-10-13 04:54:20,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:54:20,323 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-13 04:54:20,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:20,325 INFO L225 Difference]: With dead ends: 65 [2020-10-13 04:54:20,325 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 04:54:20,326 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 04:54:20,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 04:54:20,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-13 04:54:20,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 04:54:20,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-10-13 04:54:20,335 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 27 [2020-10-13 04:54:20,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:20,336 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-10-13 04:54:20,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:54:20,336 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-10-13 04:54:20,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 04:54:20,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:20,337 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:20,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:54:20,338 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:20,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:20,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1167956326, now seen corresponding path program 1 times [2020-10-13 04:54:20,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:20,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635056140] [2020-10-13 04:54:20,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:20,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:20,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:20,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:20,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:20,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:20,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:20,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:20,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:21,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:25,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:25,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 04:54:25,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 04:54:25,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 04:54:25,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:25,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:54:25,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 04:54:25,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 04:54:25,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:54:25,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:25,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:25,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:25,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:25,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:25,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:25,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:54:25,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:25,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:25,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:25,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:25,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 04:54:25,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 04:54:25,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635056140] [2020-10-13 04:54:25,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:25,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:54:25,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747562183] [2020-10-13 04:54:25,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:54:25,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:25,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:54:25,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:54:25,440 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 5 states. [2020-10-13 04:54:25,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:25,632 INFO L93 Difference]: Finished difference Result 80 states and 103 transitions. [2020-10-13 04:54:25,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:54:25,633 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-10-13 04:54:25,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:25,635 INFO L225 Difference]: With dead ends: 80 [2020-10-13 04:54:25,635 INFO L226 Difference]: Without dead ends: 48 [2020-10-13 04:54:25,636 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 04:54:25,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-13 04:54:25,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-13 04:54:25,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 04:54:25,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2020-10-13 04:54:25,658 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 35 [2020-10-13 04:54:25,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:25,658 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2020-10-13 04:54:25,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:54:25,659 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2020-10-13 04:54:25,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 04:54:25,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:25,661 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:25,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:54:25,662 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:25,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:25,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1255820446, now seen corresponding path program 2 times [2020-10-13 04:54:25,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:25,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105076255] [2020-10-13 04:54:25,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:25,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:25,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:25,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:25,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:25,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:25,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:25,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:27,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:30,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:30,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 04:54:30,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 04:54:30,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:54:30,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:30,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:54:30,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 04:54:30,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:54:30,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:30,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:30,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:30,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:30,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:30,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:30,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:30,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:30,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:30,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:30,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:30,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:30,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:30,722 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-13 04:54:30,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105076255] [2020-10-13 04:54:30,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:30,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:54:30,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481066917] [2020-10-13 04:54:30,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:54:30,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:30,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:54:30,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:54:30,725 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 6 states. [2020-10-13 04:54:30,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:30,869 INFO L93 Difference]: Finished difference Result 95 states and 118 transitions. [2020-10-13 04:54:30,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:54:30,869 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-10-13 04:54:30,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:30,870 INFO L225 Difference]: With dead ends: 95 [2020-10-13 04:54:30,871 INFO L226 Difference]: Without dead ends: 56 [2020-10-13 04:54:30,871 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 04:54:30,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-13 04:54:30,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-13 04:54:30,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 04:54:30,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2020-10-13 04:54:30,880 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 43 [2020-10-13 04:54:30,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:30,880 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2020-10-13 04:54:30,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:54:30,881 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2020-10-13 04:54:30,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 04:54:30,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:30,883 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:30,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:54:30,883 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:30,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:30,883 INFO L82 PathProgramCache]: Analyzing trace with hash 2017193242, now seen corresponding path program 3 times [2020-10-13 04:54:30,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:30,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621930418] [2020-10-13 04:54:30,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:30,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:30,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:30,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:30,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:30,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:30,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:31,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:35,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:35,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 04:54:35,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:54:35,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:54:35,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:35,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:54:35,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:54:35,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 04:54:35,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:35,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:35,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:35,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:35,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:35,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:35,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:35,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:35,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:35,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:35,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:35,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:35,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:35,958 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-13 04:54:35,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621930418] [2020-10-13 04:54:35,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:35,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:54:35,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357899324] [2020-10-13 04:54:35,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:54:35,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:35,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:54:35,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:54:35,962 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand 7 states. [2020-10-13 04:54:36,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:36,171 INFO L93 Difference]: Finished difference Result 110 states and 133 transitions. [2020-10-13 04:54:36,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:54:36,172 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2020-10-13 04:54:36,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:36,173 INFO L225 Difference]: With dead ends: 110 [2020-10-13 04:54:36,173 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 04:54:36,174 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 04:54:36,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 04:54:36,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-13 04:54:36,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 04:54:36,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2020-10-13 04:54:36,193 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 51 [2020-10-13 04:54:36,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:36,194 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2020-10-13 04:54:36,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:54:36,194 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2020-10-13 04:54:36,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 04:54:36,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:36,196 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:36,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:54:36,197 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:36,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:36,197 INFO L82 PathProgramCache]: Analyzing trace with hash 544374558, now seen corresponding path program 4 times [2020-10-13 04:54:36,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:36,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816798317] [2020-10-13 04:54:36,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:36,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:36,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:36,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:36,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:36,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:36,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:36,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:41,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:41,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 04:54:41,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:54:41,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:54:41,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:41,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:54:41,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 04:54:41,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:54:41,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:41,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:41,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:41,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:41,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:41,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:41,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:41,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:41,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:41,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:41,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:41,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:41,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:41,277 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-13 04:54:41,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816798317] [2020-10-13 04:54:41,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:41,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:54:41,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387305757] [2020-10-13 04:54:41,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:54:41,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:41,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:54:41,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:54:41,280 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 8 states. [2020-10-13 04:54:41,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:41,493 INFO L93 Difference]: Finished difference Result 125 states and 148 transitions. [2020-10-13 04:54:41,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:54:41,494 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-10-13 04:54:41,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:41,495 INFO L225 Difference]: With dead ends: 125 [2020-10-13 04:54:41,495 INFO L226 Difference]: Without dead ends: 72 [2020-10-13 04:54:41,496 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 04:54:41,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-13 04:54:41,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-13 04:54:41,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 04:54:41,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2020-10-13 04:54:41,505 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 59 [2020-10-13 04:54:41,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:41,505 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2020-10-13 04:54:41,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:54:41,505 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2020-10-13 04:54:41,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 04:54:41,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:41,507 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:41,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:54:41,507 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:41,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:41,508 INFO L82 PathProgramCache]: Analyzing trace with hash 325227418, now seen corresponding path program 5 times [2020-10-13 04:54:41,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:41,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961797064] [2020-10-13 04:54:41,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:41,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:41,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:41,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:41,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:41,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:41,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:42,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:46,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:46,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 04:54:46,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:54:46,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:54:46,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:46,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:54:46,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:54:46,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:54:46,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:46,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:46,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:46,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:46,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:46,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:46,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:46,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:46,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:46,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:46,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:46,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:46,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:46,622 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-13 04:54:46,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961797064] [2020-10-13 04:54:46,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:46,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:54:46,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315384991] [2020-10-13 04:54:46,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:54:46,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:46,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:54:46,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:54:46,624 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand 9 states. [2020-10-13 04:54:46,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:46,838 INFO L93 Difference]: Finished difference Result 140 states and 163 transitions. [2020-10-13 04:54:46,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:54:46,839 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 67 [2020-10-13 04:54:46,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:46,840 INFO L225 Difference]: With dead ends: 140 [2020-10-13 04:54:46,840 INFO L226 Difference]: Without dead ends: 80 [2020-10-13 04:54:46,841 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 04:54:46,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-13 04:54:46,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-13 04:54:46,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 04:54:46,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2020-10-13 04:54:46,858 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 67 [2020-10-13 04:54:46,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:46,858 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2020-10-13 04:54:46,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:54:46,860 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2020-10-13 04:54:46,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 04:54:46,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:46,862 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:46,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:54:46,862 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:46,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:46,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1206981022, now seen corresponding path program 6 times [2020-10-13 04:54:46,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:46,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469163094] [2020-10-13 04:54:46,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:46,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:46,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:46,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:46,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:46,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:46,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:47,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:51,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:51,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 04:54:51,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:54:51,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 04:54:51,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:51,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:54:51,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 04:54:51,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:54:51,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:51,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:51,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:51,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:51,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:51,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:51,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:51,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:51,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:51,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:51,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:51,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:51,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:51,991 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-13 04:54:51,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469163094] [2020-10-13 04:54:51,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:51,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:54:51,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004534669] [2020-10-13 04:54:51,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:54:51,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:51,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:54:51,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:54:51,993 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand 10 states. [2020-10-13 04:54:52,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:52,260 INFO L93 Difference]: Finished difference Result 155 states and 178 transitions. [2020-10-13 04:54:52,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:54:52,261 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 75 [2020-10-13 04:54:52,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:52,262 INFO L225 Difference]: With dead ends: 155 [2020-10-13 04:54:52,262 INFO L226 Difference]: Without dead ends: 88 [2020-10-13 04:54:52,266 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 04:54:52,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-13 04:54:52,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-13 04:54:52,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 04:54:52,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2020-10-13 04:54:52,286 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 75 [2020-10-13 04:54:52,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:52,286 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2020-10-13 04:54:52,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:54:52,287 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2020-10-13 04:54:52,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 04:54:52,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:52,291 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:52,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:54:52,291 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:52,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:52,291 INFO L82 PathProgramCache]: Analyzing trace with hash 192305690, now seen corresponding path program 7 times [2020-10-13 04:54:52,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:52,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424860574] [2020-10-13 04:54:52,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:52,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:52,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:52,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:52,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:52,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:52,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:53,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:57,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:57,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 04:54:57,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:54:57,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:54:57,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:57,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:54:57,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 04:54:57,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 04:54:57,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:57,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:57,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:57,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:57,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:57,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:57,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:57,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:57,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:57,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:57,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:57,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:57,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:57,408 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-13 04:54:57,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424860574] [2020-10-13 04:54:57,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:57,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:54:57,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969973103] [2020-10-13 04:54:57,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:54:57,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:57,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:54:57,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:54:57,423 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand 11 states. [2020-10-13 04:54:57,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:57,662 INFO L93 Difference]: Finished difference Result 170 states and 193 transitions. [2020-10-13 04:54:57,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:54:57,663 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 83 [2020-10-13 04:54:57,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:57,664 INFO L225 Difference]: With dead ends: 170 [2020-10-13 04:54:57,664 INFO L226 Difference]: Without dead ends: 96 [2020-10-13 04:54:57,665 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 04:54:57,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-13 04:54:57,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-10-13 04:54:57,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-13 04:54:57,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2020-10-13 04:54:57,688 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 83 [2020-10-13 04:54:57,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:57,688 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2020-10-13 04:54:57,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:54:57,689 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2020-10-13 04:54:57,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-13 04:54:57,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:57,690 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:57,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 04:54:57,691 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:57,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:57,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1640627170, now seen corresponding path program 8 times [2020-10-13 04:54:57,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:57,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103457754] [2020-10-13 04:54:57,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:57,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:57,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:57,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:57,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:57,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:58,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:02,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:02,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 04:55:02,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:55:02,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:55:02,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:02,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:55:02,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 04:55:02,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:55:02,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:02,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:02,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:02,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:02,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:02,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:02,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:02,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:02,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:02,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:02,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:02,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:02,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:55:02,845 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-10-13 04:55:02,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103457754] [2020-10-13 04:55:02,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:02,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:55:02,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101322326] [2020-10-13 04:55:02,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:55:02,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:02,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:55:02,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:55:02,849 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand 12 states. [2020-10-13 04:55:03,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:03,213 INFO L93 Difference]: Finished difference Result 185 states and 208 transitions. [2020-10-13 04:55:03,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:55:03,214 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 91 [2020-10-13 04:55:03,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:03,216 INFO L225 Difference]: With dead ends: 185 [2020-10-13 04:55:03,216 INFO L226 Difference]: Without dead ends: 104 [2020-10-13 04:55:03,217 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 04:55:03,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-13 04:55:03,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-10-13 04:55:03,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 04:55:03,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2020-10-13 04:55:03,242 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 91 [2020-10-13 04:55:03,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:03,243 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2020-10-13 04:55:03,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:55:03,243 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2020-10-13 04:55:03,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 04:55:03,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:03,250 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:03,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 04:55:03,251 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:03,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:03,254 INFO L82 PathProgramCache]: Analyzing trace with hash -32030566, now seen corresponding path program 9 times [2020-10-13 04:55:03,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:03,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447164153] [2020-10-13 04:55:03,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:03,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:03,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:03,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:03,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:03,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:03,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:05,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:08,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:08,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 04:55:08,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:55:08,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:55:08,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:08,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:55:08,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-13 04:55:08,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 04:55:08,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:08,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:08,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:08,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:08,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:08,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:08,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:08,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:08,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:08,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:08,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:08,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:08,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:55:08,428 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2020-10-13 04:55:08,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447164153] [2020-10-13 04:55:08,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:08,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:55:08,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444713448] [2020-10-13 04:55:08,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:55:08,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:08,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:55:08,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:55:08,431 INFO L87 Difference]: Start difference. First operand 104 states and 112 transitions. Second operand 13 states. [2020-10-13 04:55:08,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:08,718 INFO L93 Difference]: Finished difference Result 200 states and 223 transitions. [2020-10-13 04:55:08,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:55:08,718 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 99 [2020-10-13 04:55:08,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:08,719 INFO L225 Difference]: With dead ends: 200 [2020-10-13 04:55:08,719 INFO L226 Difference]: Without dead ends: 112 [2020-10-13 04:55:08,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:55:08,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-13 04:55:08,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-10-13 04:55:08,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 04:55:08,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2020-10-13 04:55:08,731 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 99 [2020-10-13 04:55:08,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:08,732 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2020-10-13 04:55:08,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:55:08,732 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2020-10-13 04:55:08,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 04:55:08,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:08,734 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:08,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 04:55:08,735 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:08,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:08,735 INFO L82 PathProgramCache]: Analyzing trace with hash 35739294, now seen corresponding path program 10 times [2020-10-13 04:55:08,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:08,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133600239] [2020-10-13 04:55:08,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:08,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:08,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:08,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:08,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:08,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:08,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:10,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:13,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:13,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 04:55:13,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:55:13,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:55:13,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:13,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:55:13,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-13 04:55:13,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:55:13,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:13,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:13,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:13,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:13,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:13,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:13,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:13,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:13,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:13,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:13,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:13,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:13,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:13,897 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-10-13 04:55:13,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133600239] [2020-10-13 04:55:13,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:13,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:55:13,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551247311] [2020-10-13 04:55:13,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:55:13,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:13,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:55:13,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:55:13,899 INFO L87 Difference]: Start difference. First operand 112 states and 120 transitions. Second operand 14 states. [2020-10-13 04:55:14,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:14,205 INFO L93 Difference]: Finished difference Result 215 states and 238 transitions. [2020-10-13 04:55:14,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:55:14,205 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 107 [2020-10-13 04:55:14,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:14,206 INFO L225 Difference]: With dead ends: 215 [2020-10-13 04:55:14,206 INFO L226 Difference]: Without dead ends: 120 [2020-10-13 04:55:14,208 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 04:55:14,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-13 04:55:14,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2020-10-13 04:55:14,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-13 04:55:14,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 128 transitions. [2020-10-13 04:55:14,214 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 128 transitions. Word has length 107 [2020-10-13 04:55:14,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:14,215 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 128 transitions. [2020-10-13 04:55:14,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:55:14,215 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 128 transitions. [2020-10-13 04:55:14,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-13 04:55:14,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:14,216 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:14,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 04:55:14,216 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:14,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:14,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1494923494, now seen corresponding path program 11 times [2020-10-13 04:55:14,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:14,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164918882] [2020-10-13 04:55:14,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:14,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:14,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:14,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:14,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:14,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:14,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:16,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:19,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:19,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-13 04:55:19,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:55:19,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 04:55:19,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:19,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:55:19,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:55:19,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 04:55:19,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:19,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:19,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:19,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:19,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:19,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:19,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:19,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:19,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:19,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:19,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:19,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:19,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:19,391 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2020-10-13 04:55:19,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164918882] [2020-10-13 04:55:19,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:19,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:55:19,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153990750] [2020-10-13 04:55:19,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:55:19,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:19,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:55:19,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:55:19,394 INFO L87 Difference]: Start difference. First operand 120 states and 128 transitions. Second operand 15 states. [2020-10-13 04:55:19,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:19,693 INFO L93 Difference]: Finished difference Result 230 states and 253 transitions. [2020-10-13 04:55:19,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:55:19,694 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 115 [2020-10-13 04:55:19,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:19,696 INFO L225 Difference]: With dead ends: 230 [2020-10-13 04:55:19,696 INFO L226 Difference]: Without dead ends: 128 [2020-10-13 04:55:19,697 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 04:55:19,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-13 04:55:19,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2020-10-13 04:55:19,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-13 04:55:19,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 136 transitions. [2020-10-13 04:55:19,706 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 136 transitions. Word has length 115 [2020-10-13 04:55:19,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:19,706 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 136 transitions. [2020-10-13 04:55:19,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:55:19,706 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 136 transitions. [2020-10-13 04:55:19,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-13 04:55:19,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:19,708 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:19,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 04:55:19,708 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:19,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:19,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1418922270, now seen corresponding path program 12 times [2020-10-13 04:55:19,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:19,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667060781] [2020-10-13 04:55:19,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:19,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:19,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:19,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:19,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:19,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:19,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:22,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:24,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:24,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-13 04:55:24,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:55:24,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 04:55:24,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:24,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:55:24,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 04:55:24,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:55:24,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:24,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:24,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:24,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:24,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:24,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:24,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:24,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:24,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:24,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:24,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:24,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:24,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:55:24,931 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2020-10-13 04:55:24,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667060781] [2020-10-13 04:55:24,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:24,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:55:24,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366101068] [2020-10-13 04:55:24,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:55:24,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:24,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:55:24,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:55:24,934 INFO L87 Difference]: Start difference. First operand 128 states and 136 transitions. Second operand 16 states. [2020-10-13 04:55:25,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:25,273 INFO L93 Difference]: Finished difference Result 245 states and 268 transitions. [2020-10-13 04:55:25,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:55:25,274 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 123 [2020-10-13 04:55:25,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:25,276 INFO L225 Difference]: With dead ends: 245 [2020-10-13 04:55:25,276 INFO L226 Difference]: Without dead ends: 136 [2020-10-13 04:55:25,277 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 04:55:25,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-13 04:55:25,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2020-10-13 04:55:25,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 04:55:25,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 144 transitions. [2020-10-13 04:55:25,284 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 144 transitions. Word has length 123 [2020-10-13 04:55:25,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:25,284 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 144 transitions. [2020-10-13 04:55:25,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:55:25,285 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 144 transitions. [2020-10-13 04:55:25,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-13 04:55:25,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:25,286 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:25,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 04:55:25,287 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:25,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:25,287 INFO L82 PathProgramCache]: Analyzing trace with hash -545231462, now seen corresponding path program 13 times [2020-10-13 04:55:25,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:25,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540593508] [2020-10-13 04:55:25,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:25,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:25,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:25,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:25,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:25,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:25,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:28,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:30,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:30,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-13 04:55:30,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:55:30,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 04:55:30,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:30,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:55:30,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-13 04:55:30,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 04:55:30,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:30,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:30,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:30,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:30,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:30,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:30,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:30,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:30,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:30,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:30,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:30,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:30,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:30,505 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 637 trivial. 0 not checked. [2020-10-13 04:55:30,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540593508] [2020-10-13 04:55:30,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:30,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:55:30,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987128804] [2020-10-13 04:55:30,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:55:30,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:30,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:55:30,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:55:30,507 INFO L87 Difference]: Start difference. First operand 136 states and 144 transitions. Second operand 17 states. [2020-10-13 04:55:30,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:30,854 INFO L93 Difference]: Finished difference Result 260 states and 283 transitions. [2020-10-13 04:55:30,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:55:30,855 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 131 [2020-10-13 04:55:30,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:30,857 INFO L225 Difference]: With dead ends: 260 [2020-10-13 04:55:30,857 INFO L226 Difference]: Without dead ends: 144 [2020-10-13 04:55:30,858 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 04:55:30,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-13 04:55:30,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-10-13 04:55:30,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-13 04:55:30,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 152 transitions. [2020-10-13 04:55:30,866 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 152 transitions. Word has length 131 [2020-10-13 04:55:30,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:30,866 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 152 transitions. [2020-10-13 04:55:30,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:55:30,866 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 152 transitions. [2020-10-13 04:55:30,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-13 04:55:30,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:30,868 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:30,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 04:55:30,868 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:30,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:30,869 INFO L82 PathProgramCache]: Analyzing trace with hash 2020285342, now seen corresponding path program 14 times [2020-10-13 04:55:30,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:30,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385299815] [2020-10-13 04:55:30,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:30,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:30,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:30,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:30,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:31,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:31,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:35,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:35,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:35,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-13 04:55:35,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:55:35,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 04:55:35,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:35,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:55:35,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:55:35,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:55:35,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:36,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:36,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:36,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:36,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:36,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:36,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:36,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:55:36,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:36,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:36,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:36,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:36,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:36,086 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 735 trivial. 0 not checked. [2020-10-13 04:55:36,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385299815] [2020-10-13 04:55:36,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:36,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:55:36,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206955879] [2020-10-13 04:55:36,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:55:36,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:36,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:55:36,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:55:36,089 INFO L87 Difference]: Start difference. First operand 144 states and 152 transitions. Second operand 18 states. [2020-10-13 04:55:36,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:36,489 INFO L93 Difference]: Finished difference Result 275 states and 298 transitions. [2020-10-13 04:55:36,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:55:36,489 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 139 [2020-10-13 04:55:36,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:36,491 INFO L225 Difference]: With dead ends: 275 [2020-10-13 04:55:36,491 INFO L226 Difference]: Without dead ends: 152 [2020-10-13 04:55:36,492 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 04:55:36,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-13 04:55:36,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2020-10-13 04:55:36,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-13 04:55:36,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 160 transitions. [2020-10-13 04:55:36,503 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 160 transitions. Word has length 139 [2020-10-13 04:55:36,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:36,504 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 160 transitions. [2020-10-13 04:55:36,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:55:36,504 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 160 transitions. [2020-10-13 04:55:36,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-13 04:55:36,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:36,506 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:36,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 04:55:36,506 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:36,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:36,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1618430950, now seen corresponding path program 15 times [2020-10-13 04:55:36,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:36,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767662464] [2020-10-13 04:55:36,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:36,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:36,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:36,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:36,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:36,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:36,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:41,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:41,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-13 04:55:41,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:55:41,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 04:55:41,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:41,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:55:41,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-13 04:55:41,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 04:55:41,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:41,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:41,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:41,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:41,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:41,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:41,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:41,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:41,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:41,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:41,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:41,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:41,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:41,754 INFO L134 CoverageAnalysis]: Checked inductivity of 960 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-10-13 04:55:41,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767662464] [2020-10-13 04:55:41,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:41,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:55:41,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809741256] [2020-10-13 04:55:41,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:55:41,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:41,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:55:41,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:55:41,757 INFO L87 Difference]: Start difference. First operand 152 states and 160 transitions. Second operand 19 states. [2020-10-13 04:55:42,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:42,165 INFO L93 Difference]: Finished difference Result 290 states and 313 transitions. [2020-10-13 04:55:42,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:55:42,165 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 147 [2020-10-13 04:55:42,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:42,167 INFO L225 Difference]: With dead ends: 290 [2020-10-13 04:55:42,168 INFO L226 Difference]: Without dead ends: 160 [2020-10-13 04:55:42,168 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 04:55:42,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-13 04:55:42,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2020-10-13 04:55:42,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-13 04:55:42,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 168 transitions. [2020-10-13 04:55:42,175 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 168 transitions. Word has length 147 [2020-10-13 04:55:42,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:42,176 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 168 transitions. [2020-10-13 04:55:42,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:55:42,176 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 168 transitions. [2020-10-13 04:55:42,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-13 04:55:42,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:42,178 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:42,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 04:55:42,178 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:42,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:42,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1384746526, now seen corresponding path program 16 times [2020-10-13 04:55:42,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:42,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471319535] [2020-10-13 04:55:42,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:42,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:42,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:42,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:42,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:42,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:42,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:47,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:47,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-13 04:55:47,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:55:47,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 04:55:47,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:47,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:55:47,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-13 04:55:47,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:55:47,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:47,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:47,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:47,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:47,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:47,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:47,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:47,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:47,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:47,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:47,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:47,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:47,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:47,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 952 trivial. 0 not checked. [2020-10-13 04:55:47,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471319535] [2020-10-13 04:55:47,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:47,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:55:47,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175569063] [2020-10-13 04:55:47,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:55:47,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:47,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:55:47,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:55:47,462 INFO L87 Difference]: Start difference. First operand 160 states and 168 transitions. Second operand 20 states. [2020-10-13 04:55:47,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:47,898 INFO L93 Difference]: Finished difference Result 305 states and 328 transitions. [2020-10-13 04:55:47,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:55:47,898 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 155 [2020-10-13 04:55:47,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:47,900 INFO L225 Difference]: With dead ends: 305 [2020-10-13 04:55:47,900 INFO L226 Difference]: Without dead ends: 168 [2020-10-13 04:55:47,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:55:47,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-13 04:55:47,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2020-10-13 04:55:47,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-13 04:55:47,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 176 transitions. [2020-10-13 04:55:47,909 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 176 transitions. Word has length 155 [2020-10-13 04:55:47,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:47,910 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 176 transitions. [2020-10-13 04:55:47,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:55:47,910 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 176 transitions. [2020-10-13 04:55:47,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-13 04:55:47,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:47,912 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:47,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 04:55:47,912 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:47,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:47,912 INFO L82 PathProgramCache]: Analyzing trace with hash -56747366, now seen corresponding path program 17 times [2020-10-13 04:55:47,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:47,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280801628] [2020-10-13 04:55:47,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:47,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:47,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:48,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:48,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:48,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:48,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:52,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:52,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-13 04:55:52,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:55:52,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 04:55:52,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:52,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:55:52,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-13 04:55:52,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 04:55:52,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:53,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:53,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:53,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:53,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:53,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:53,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:53,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:53,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:53,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:53,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:53,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:53,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:53,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 1071 trivial. 0 not checked. [2020-10-13 04:55:53,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280801628] [2020-10-13 04:55:53,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:53,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:55:53,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761006769] [2020-10-13 04:55:53,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:55:53,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:53,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:55:53,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:55:53,204 INFO L87 Difference]: Start difference. First operand 168 states and 176 transitions. Second operand 21 states. [2020-10-13 04:55:53,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:53,657 INFO L93 Difference]: Finished difference Result 320 states and 343 transitions. [2020-10-13 04:55:53,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:55:53,658 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 163 [2020-10-13 04:55:53,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:53,659 INFO L225 Difference]: With dead ends: 320 [2020-10-13 04:55:53,659 INFO L226 Difference]: Without dead ends: 176 [2020-10-13 04:55:53,660 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 04:55:53,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-13 04:55:53,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2020-10-13 04:55:53,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-13 04:55:53,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 184 transitions. [2020-10-13 04:55:53,667 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 184 transitions. Word has length 163 [2020-10-13 04:55:53,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:53,667 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 184 transitions. [2020-10-13 04:55:53,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:55:53,668 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 184 transitions. [2020-10-13 04:55:53,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-13 04:55:53,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:53,669 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:53,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 04:55:53,669 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:53,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:53,670 INFO L82 PathProgramCache]: Analyzing trace with hash -909221730, now seen corresponding path program 18 times [2020-10-13 04:55:53,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:53,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579098610] [2020-10-13 04:55:53,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:53,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:53,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:53,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:53,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:53,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:53,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:58,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:58,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-13 04:55:58,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:55:58,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 04:55:58,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:58,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:55:58,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 04:55:58,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:55:58,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:58,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:58,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:58,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:58,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:58,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:58,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:58,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:58,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:58,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:58,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:58,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:58,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:58,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 1197 trivial. 0 not checked. [2020-10-13 04:55:58,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579098610] [2020-10-13 04:55:58,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:58,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:55:58,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840241407] [2020-10-13 04:55:58,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:55:58,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:58,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:55:58,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:55:58,979 INFO L87 Difference]: Start difference. First operand 176 states and 184 transitions. Second operand 22 states. [2020-10-13 04:55:59,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:59,456 INFO L93 Difference]: Finished difference Result 335 states and 358 transitions. [2020-10-13 04:55:59,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:55:59,457 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 171 [2020-10-13 04:55:59,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:59,459 INFO L225 Difference]: With dead ends: 335 [2020-10-13 04:55:59,459 INFO L226 Difference]: Without dead ends: 184 [2020-10-13 04:55:59,460 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 04:55:59,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-13 04:55:59,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2020-10-13 04:55:59,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-13 04:55:59,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 192 transitions. [2020-10-13 04:55:59,469 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 192 transitions. Word has length 171 [2020-10-13 04:55:59,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:59,469 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 192 transitions. [2020-10-13 04:55:59,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:55:59,469 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 192 transitions. [2020-10-13 04:55:59,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-13 04:55:59,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:59,471 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:59,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 04:55:59,471 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:59,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:59,471 INFO L82 PathProgramCache]: Analyzing trace with hash 710975770, now seen corresponding path program 19 times [2020-10-13 04:55:59,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:59,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384365890] [2020-10-13 04:55:59,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:59,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:59,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:59,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:59,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:59,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:59,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:04,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:04,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-13 04:56:04,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:56:04,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-13 04:56:04,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:04,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:56:04,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-10-13 04:56:04,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 04:56:04,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:04,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:04,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:04,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:04,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:04,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:04,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:04,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:04,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:04,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:04,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:04,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:04,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:04,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1330 trivial. 0 not checked. [2020-10-13 04:56:04,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384365890] [2020-10-13 04:56:04,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:04,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:56:04,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210873129] [2020-10-13 04:56:04,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:56:04,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:04,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:56:04,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:56:04,841 INFO L87 Difference]: Start difference. First operand 184 states and 192 transitions. Second operand 23 states. [2020-10-13 04:56:05,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:05,322 INFO L93 Difference]: Finished difference Result 350 states and 373 transitions. [2020-10-13 04:56:05,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:56:05,322 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 179 [2020-10-13 04:56:05,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:05,324 INFO L225 Difference]: With dead ends: 350 [2020-10-13 04:56:05,325 INFO L226 Difference]: Without dead ends: 192 [2020-10-13 04:56:05,325 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 04:56:05,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-13 04:56:05,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2020-10-13 04:56:05,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-13 04:56:05,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 200 transitions. [2020-10-13 04:56:05,334 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 200 transitions. Word has length 179 [2020-10-13 04:56:05,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:05,335 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 200 transitions. [2020-10-13 04:56:05,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:56:05,335 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 200 transitions. [2020-10-13 04:56:05,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-13 04:56:05,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:05,337 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:05,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 04:56:05,337 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:05,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:05,337 INFO L82 PathProgramCache]: Analyzing trace with hash -954625250, now seen corresponding path program 20 times [2020-10-13 04:56:05,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:05,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344183097] [2020-10-13 04:56:05,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:05,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:05,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:05,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:05,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:05,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:05,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:10,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:10,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-13 04:56:10,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:56:10,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:56:10,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:10,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:56:10,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-13 04:56:10,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:56:10,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:10,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:10,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:10,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:10,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:10,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:10,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:10,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:10,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:10,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:10,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:10,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:10,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:10,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1680 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1470 trivial. 0 not checked. [2020-10-13 04:56:10,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344183097] [2020-10-13 04:56:10,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:10,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:56:10,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759140722] [2020-10-13 04:56:10,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:56:10,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:10,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:56:10,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:56:10,716 INFO L87 Difference]: Start difference. First operand 192 states and 200 transitions. Second operand 24 states. [2020-10-13 04:56:11,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:11,231 INFO L93 Difference]: Finished difference Result 365 states and 388 transitions. [2020-10-13 04:56:11,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:56:11,234 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 187 [2020-10-13 04:56:11,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:11,235 INFO L225 Difference]: With dead ends: 365 [2020-10-13 04:56:11,235 INFO L226 Difference]: Without dead ends: 200 [2020-10-13 04:56:11,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:56:11,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-13 04:56:11,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2020-10-13 04:56:11,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-13 04:56:11,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 208 transitions. [2020-10-13 04:56:11,250 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 208 transitions. Word has length 187 [2020-10-13 04:56:11,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:11,250 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 208 transitions. [2020-10-13 04:56:11,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:56:11,250 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 208 transitions. [2020-10-13 04:56:11,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-13 04:56:11,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:11,252 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:11,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 04:56:11,252 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:11,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:11,252 INFO L82 PathProgramCache]: Analyzing trace with hash 2054178714, now seen corresponding path program 21 times [2020-10-13 04:56:11,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:11,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057587593] [2020-10-13 04:56:11,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:11,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:11,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:11,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:11,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:11,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:11,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:16,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:16,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-13 04:56:16,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:56:16,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 04:56:16,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:16,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 04:56:16,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-10-13 04:56:16,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 04:56:16,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:16,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:16,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:16,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:16,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:16,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:16,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:16,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:16,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:16,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:16,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:16,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:16,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:16,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1848 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2020-10-13 04:56:16,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1057587593] [2020-10-13 04:56:16,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:16,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 04:56:16,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160101548] [2020-10-13 04:56:16,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 04:56:16,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:16,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 04:56:16,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:56:16,690 INFO L87 Difference]: Start difference. First operand 200 states and 208 transitions. Second operand 25 states. [2020-10-13 04:56:17,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:17,167 INFO L93 Difference]: Finished difference Result 380 states and 403 transitions. [2020-10-13 04:56:17,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 04:56:17,168 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 195 [2020-10-13 04:56:17,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:17,169 INFO L225 Difference]: With dead ends: 380 [2020-10-13 04:56:17,169 INFO L226 Difference]: Without dead ends: 208 [2020-10-13 04:56:17,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:56:17,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-13 04:56:17,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2020-10-13 04:56:17,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-13 04:56:17,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 216 transitions. [2020-10-13 04:56:17,178 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 216 transitions. Word has length 195 [2020-10-13 04:56:17,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:17,179 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 216 transitions. [2020-10-13 04:56:17,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 04:56:17,179 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 216 transitions. [2020-10-13 04:56:17,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-13 04:56:17,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:17,180 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:17,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 04:56:17,181 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:17,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:17,181 INFO L82 PathProgramCache]: Analyzing trace with hash 894117278, now seen corresponding path program 22 times [2020-10-13 04:56:17,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:17,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085781771] [2020-10-13 04:56:17,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:17,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:17,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:17,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:17,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:17,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:17,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:22,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:22,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 211 [2020-10-13 04:56:22,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:56:22,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-13 04:56:22,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:22,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:56:22,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:56:22,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:56:22,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:22,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:22,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:22,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:22,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:22,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:22,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:22,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:22,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:22,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:22,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:22,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:22,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:22,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2024 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2020-10-13 04:56:22,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2085781771] [2020-10-13 04:56:22,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:22,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 04:56:22,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669537695] [2020-10-13 04:56:22,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 04:56:22,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:22,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 04:56:22,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:56:22,629 INFO L87 Difference]: Start difference. First operand 208 states and 216 transitions. Second operand 26 states. [2020-10-13 04:56:23,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:23,199 INFO L93 Difference]: Finished difference Result 395 states and 418 transitions. [2020-10-13 04:56:23,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 04:56:23,200 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 203 [2020-10-13 04:56:23,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:23,202 INFO L225 Difference]: With dead ends: 395 [2020-10-13 04:56:23,202 INFO L226 Difference]: Without dead ends: 216 [2020-10-13 04:56:23,203 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 04:56:23,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-13 04:56:23,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2020-10-13 04:56:23,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-13 04:56:23,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 224 transitions. [2020-10-13 04:56:23,218 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 224 transitions. Word has length 203 [2020-10-13 04:56:23,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:23,218 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 224 transitions. [2020-10-13 04:56:23,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 04:56:23,218 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 224 transitions. [2020-10-13 04:56:23,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-13 04:56:23,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:23,220 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:23,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 04:56:23,225 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:23,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:23,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1550650906, now seen corresponding path program 23 times [2020-10-13 04:56:23,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:23,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046162906] [2020-10-13 04:56:23,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:23,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:23,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:23,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:23,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:23,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:23,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:28,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:28,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-13 04:56:28,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:56:28,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 04:56:28,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:28,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 04:56:28,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-13 04:56:28,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 04:56:28,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:28,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:28,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:28,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:28,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:28,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:28,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:28,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:28,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:28,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:28,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:28,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:28,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:56:28,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2208 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1932 trivial. 0 not checked. [2020-10-13 04:56:28,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046162906] [2020-10-13 04:56:28,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:28,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 04:56:28,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272642021] [2020-10-13 04:56:28,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 04:56:28,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:28,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 04:56:28,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:56:28,872 INFO L87 Difference]: Start difference. First operand 216 states and 224 transitions. Second operand 27 states. [2020-10-13 04:56:29,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:29,499 INFO L93 Difference]: Finished difference Result 410 states and 433 transitions. [2020-10-13 04:56:29,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 04:56:29,500 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 211 [2020-10-13 04:56:29,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:29,501 INFO L225 Difference]: With dead ends: 410 [2020-10-13 04:56:29,502 INFO L226 Difference]: Without dead ends: 224 [2020-10-13 04:56:29,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:56:29,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-13 04:56:29,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2020-10-13 04:56:29,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-13 04:56:29,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 232 transitions. [2020-10-13 04:56:29,515 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 232 transitions. Word has length 211 [2020-10-13 04:56:29,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:29,515 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 232 transitions. [2020-10-13 04:56:29,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 04:56:29,516 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 232 transitions. [2020-10-13 04:56:29,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-10-13 04:56:29,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:29,517 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:29,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 04:56:29,517 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:29,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:29,518 INFO L82 PathProgramCache]: Analyzing trace with hash 21174302, now seen corresponding path program 24 times [2020-10-13 04:56:29,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:29,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400954373] [2020-10-13 04:56:29,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:29,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:29,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:29,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:29,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:30,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:30,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:34,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:34,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 227 [2020-10-13 04:56:34,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:56:34,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:56:34,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:34,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 04:56:34,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 04:56:34,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:56:34,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:35,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:35,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:35,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:35,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:35,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:35,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:35,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:35,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:35,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:35,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:35,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:35,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:56:35,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2400 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 2100 trivial. 0 not checked. [2020-10-13 04:56:35,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400954373] [2020-10-13 04:56:35,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:35,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 04:56:35,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686090020] [2020-10-13 04:56:35,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 04:56:35,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:35,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 04:56:35,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:56:35,073 INFO L87 Difference]: Start difference. First operand 224 states and 232 transitions. Second operand 28 states. [2020-10-13 04:56:35,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:35,579 INFO L93 Difference]: Finished difference Result 425 states and 448 transitions. [2020-10-13 04:56:35,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 04:56:35,580 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 219 [2020-10-13 04:56:35,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:35,581 INFO L225 Difference]: With dead ends: 425 [2020-10-13 04:56:35,581 INFO L226 Difference]: Without dead ends: 232 [2020-10-13 04:56:35,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:56:35,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-13 04:56:35,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2020-10-13 04:56:35,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-13 04:56:35,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 240 transitions. [2020-10-13 04:56:35,591 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 240 transitions. Word has length 219 [2020-10-13 04:56:35,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:35,592 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 240 transitions. [2020-10-13 04:56:35,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 04:56:35,592 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 240 transitions. [2020-10-13 04:56:35,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-13 04:56:35,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:35,594 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:35,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 04:56:35,594 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:35,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:35,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1576465562, now seen corresponding path program 25 times [2020-10-13 04:56:35,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:35,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569054453] [2020-10-13 04:56:35,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:35,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:35,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:35,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:35,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:36,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:40,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:40,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-13 04:56:40,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:56:40,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-13 04:56:40,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:40,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 04:56:40,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:56:40,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 04:56:40,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:41,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:41,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:41,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:41,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:41,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:41,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:41,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:41,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:41,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:41,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:41,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:41,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:41,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2600 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 2275 trivial. 0 not checked. [2020-10-13 04:56:41,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569054453] [2020-10-13 04:56:41,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:41,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 04:56:41,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210013072] [2020-10-13 04:56:41,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 04:56:41,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:41,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 04:56:41,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:56:41,200 INFO L87 Difference]: Start difference. First operand 232 states and 240 transitions. Second operand 29 states. [2020-10-13 04:56:41,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:41,761 INFO L93 Difference]: Finished difference Result 440 states and 463 transitions. [2020-10-13 04:56:41,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 04:56:41,762 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 227 [2020-10-13 04:56:41,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:41,764 INFO L225 Difference]: With dead ends: 440 [2020-10-13 04:56:41,764 INFO L226 Difference]: Without dead ends: 240 [2020-10-13 04:56:41,766 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 04:56:41,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-13 04:56:41,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2020-10-13 04:56:41,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-13 04:56:41,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 248 transitions. [2020-10-13 04:56:41,774 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 248 transitions. Word has length 227 [2020-10-13 04:56:41,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:41,774 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 248 transitions. [2020-10-13 04:56:41,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 04:56:41,774 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 248 transitions. [2020-10-13 04:56:41,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-10-13 04:56:41,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:41,776 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:41,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 04:56:41,776 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:41,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:41,777 INFO L82 PathProgramCache]: Analyzing trace with hash 434203294, now seen corresponding path program 26 times [2020-10-13 04:56:41,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:41,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342176993] [2020-10-13 04:56:41,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:41,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:41,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:41,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:42,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:42,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:42,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:46,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:46,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 243 [2020-10-13 04:56:46,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:56:46,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:56:46,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:46,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 04:56:46,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 95 [2020-10-13 04:56:46,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:56:46,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:47,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:47,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:47,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:47,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:47,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:47,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:47,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:56:47,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:47,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:47,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:47,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:47,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:47,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2808 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 2457 trivial. 0 not checked. [2020-10-13 04:56:47,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342176993] [2020-10-13 04:56:47,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:47,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 04:56:47,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073384867] [2020-10-13 04:56:47,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 04:56:47,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:47,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 04:56:47,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:56:47,377 INFO L87 Difference]: Start difference. First operand 240 states and 248 transitions. Second operand 30 states. [2020-10-13 04:56:48,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:48,071 INFO L93 Difference]: Finished difference Result 455 states and 478 transitions. [2020-10-13 04:56:48,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 04:56:48,072 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 235 [2020-10-13 04:56:48,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:48,073 INFO L225 Difference]: With dead ends: 455 [2020-10-13 04:56:48,073 INFO L226 Difference]: Without dead ends: 248 [2020-10-13 04:56:48,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:56:48,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-13 04:56:48,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2020-10-13 04:56:48,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-10-13 04:56:48,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 256 transitions. [2020-10-13 04:56:48,083 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 256 transitions. Word has length 235 [2020-10-13 04:56:48,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:48,083 INFO L479 AbstractCegarLoop]: Abstraction has 248 states and 256 transitions. [2020-10-13 04:56:48,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 04:56:48,083 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 256 transitions. [2020-10-13 04:56:48,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-10-13 04:56:48,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:48,085 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:48,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 04:56:48,085 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:48,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:48,086 INFO L82 PathProgramCache]: Analyzing trace with hash 716045082, now seen corresponding path program 27 times [2020-10-13 04:56:48,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:48,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1374666976] [2020-10-13 04:56:48,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:48,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:48,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:48,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:48,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:48,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:48,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:53,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:53,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 251 [2020-10-13 04:56:53,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:56:53,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 04:56:53,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:53,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 04:56:53,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 127 [2020-10-13 04:56:53,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 04:56:53,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:53,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:53,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:53,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:53,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:53,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:53,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:53,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:56:53,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:53,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:53,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:53,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:53,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:53,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3024 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2646 trivial. 0 not checked. [2020-10-13 04:56:53,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1374666976] [2020-10-13 04:56:53,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:53,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 04:56:53,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306179603] [2020-10-13 04:56:53,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 04:56:53,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:53,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 04:56:53,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:56:53,688 INFO L87 Difference]: Start difference. First operand 248 states and 256 transitions. Second operand 31 states. [2020-10-13 04:56:54,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:54,257 INFO L93 Difference]: Finished difference Result 470 states and 493 transitions. [2020-10-13 04:56:54,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 04:56:54,257 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 243 [2020-10-13 04:56:54,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:54,260 INFO L225 Difference]: With dead ends: 470 [2020-10-13 04:56:54,260 INFO L226 Difference]: Without dead ends: 256 [2020-10-13 04:56:54,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:56:54,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-13 04:56:54,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2020-10-13 04:56:54,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-13 04:56:54,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 264 transitions. [2020-10-13 04:56:54,273 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 264 transitions. Word has length 243 [2020-10-13 04:56:54,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:54,274 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 264 transitions. [2020-10-13 04:56:54,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 04:56:54,274 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 264 transitions. [2020-10-13 04:56:54,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-13 04:56:54,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:54,276 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:54,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 04:56:54,278 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:54,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:54,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1879448862, now seen corresponding path program 28 times [2020-10-13 04:56:54,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:54,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732490242] [2020-10-13 04:56:54,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:54,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:54,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:54,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:54,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:54,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:54,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:59,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:59,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 259 [2020-10-13 04:56:59,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:56:59,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 04:56:59,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:59,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 04:56:59,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:56:59,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:56:59,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:56:59,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:59,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:59,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:59,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:59,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:59,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:59,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:59,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:59,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:59,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:59,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:59,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:59,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3248 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 2842 trivial. 0 not checked. [2020-10-13 04:56:59,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732490242] [2020-10-13 04:56:59,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:59,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 04:56:59,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963693808] [2020-10-13 04:56:59,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 04:56:59,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:59,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 04:56:59,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:56:59,923 INFO L87 Difference]: Start difference. First operand 256 states and 264 transitions. Second operand 32 states. [2020-10-13 04:57:00,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:00,627 INFO L93 Difference]: Finished difference Result 485 states and 508 transitions. [2020-10-13 04:57:00,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 04:57:00,628 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 251 [2020-10-13 04:57:00,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:00,629 INFO L225 Difference]: With dead ends: 485 [2020-10-13 04:57:00,629 INFO L226 Difference]: Without dead ends: 264 [2020-10-13 04:57:00,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:57:00,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-13 04:57:00,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2020-10-13 04:57:00,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-13 04:57:00,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 272 transitions. [2020-10-13 04:57:00,639 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 272 transitions. Word has length 251 [2020-10-13 04:57:00,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:00,639 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 272 transitions. [2020-10-13 04:57:00,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 04:57:00,640 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 272 transitions. [2020-10-13 04:57:00,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-10-13 04:57:00,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:00,641 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:00,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 04:57:00,642 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:00,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:00,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1942871654, now seen corresponding path program 29 times [2020-10-13 04:57:00,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:00,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149521333] [2020-10-13 04:57:00,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:00,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:00,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:00,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:00,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:01,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:01,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:05,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:05,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 267 [2020-10-13 04:57:05,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:57:05,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:57:05,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:05,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 04:57:05,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 04:57:05,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 04:57:05,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:06,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:06,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:06,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:06,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:06,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:06,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:06,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:57:06,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:06,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:06,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:06,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:06,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:06,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 3045 trivial. 0 not checked. [2020-10-13 04:57:06,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149521333] [2020-10-13 04:57:06,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:06,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 04:57:06,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691947916] [2020-10-13 04:57:06,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 04:57:06,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:06,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 04:57:06,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:57:06,316 INFO L87 Difference]: Start difference. First operand 264 states and 272 transitions. Second operand 33 states. [2020-10-13 04:57:07,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:07,035 INFO L93 Difference]: Finished difference Result 500 states and 523 transitions. [2020-10-13 04:57:07,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 04:57:07,035 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 259 [2020-10-13 04:57:07,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:07,037 INFO L225 Difference]: With dead ends: 500 [2020-10-13 04:57:07,037 INFO L226 Difference]: Without dead ends: 272 [2020-10-13 04:57:07,039 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 04:57:07,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-13 04:57:07,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2020-10-13 04:57:07,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-13 04:57:07,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 280 transitions. [2020-10-13 04:57:07,046 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 280 transitions. Word has length 259 [2020-10-13 04:57:07,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:07,046 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 280 transitions. [2020-10-13 04:57:07,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 04:57:07,047 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 280 transitions. [2020-10-13 04:57:07,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-10-13 04:57:07,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:07,048 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:07,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 04:57:07,049 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:07,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:07,049 INFO L82 PathProgramCache]: Analyzing trace with hash -158257250, now seen corresponding path program 30 times [2020-10-13 04:57:07,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:07,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324413561] [2020-10-13 04:57:07,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:07,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:07,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:07,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:07,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:07,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:07,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:12,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:12,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-13 04:57:12,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:57:12,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-13 04:57:12,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:12,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 04:57:12,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 107 [2020-10-13 04:57:12,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:57:12,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:12,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:12,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:12,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:12,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:12,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:12,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:12,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:12,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:12,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:12,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:12,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:12,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:12,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3720 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 3255 trivial. 0 not checked. [2020-10-13 04:57:12,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324413561] [2020-10-13 04:57:12,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:12,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 04:57:12,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012042734] [2020-10-13 04:57:12,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 04:57:12,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:12,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 04:57:12,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:57:12,799 INFO L87 Difference]: Start difference. First operand 272 states and 280 transitions. Second operand 34 states. [2020-10-13 04:57:13,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:13,539 INFO L93 Difference]: Finished difference Result 515 states and 538 transitions. [2020-10-13 04:57:13,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 04:57:13,539 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 267 [2020-10-13 04:57:13,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:13,542 INFO L225 Difference]: With dead ends: 515 [2020-10-13 04:57:13,542 INFO L226 Difference]: Without dead ends: 280 [2020-10-13 04:57:13,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:57:13,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-13 04:57:13,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2020-10-13 04:57:13,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-13 04:57:13,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 288 transitions. [2020-10-13 04:57:13,552 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 288 transitions. Word has length 267 [2020-10-13 04:57:13,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:13,552 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 288 transitions. [2020-10-13 04:57:13,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 04:57:13,552 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 288 transitions. [2020-10-13 04:57:13,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2020-10-13 04:57:13,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:13,554 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:13,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 04:57:13,555 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:13,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:13,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1780705306, now seen corresponding path program 31 times [2020-10-13 04:57:13,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:13,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431612300] [2020-10-13 04:57:13,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:13,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:13,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:13,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:13,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:14,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:14,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:18,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:18,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 283 [2020-10-13 04:57:18,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:57:18,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 04:57:18,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:18,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 04:57:18,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-13 04:57:18,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 04:57:18,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:19,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:19,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:19,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:19,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:19,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:19,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:19,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:19,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:19,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:19,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:19,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:19,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:19,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3968 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 3472 trivial. 0 not checked. [2020-10-13 04:57:19,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431612300] [2020-10-13 04:57:19,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:19,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 04:57:19,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38347006] [2020-10-13 04:57:19,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 04:57:19,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:19,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 04:57:19,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:57:19,330 INFO L87 Difference]: Start difference. First operand 280 states and 288 transitions. Second operand 35 states. [2020-10-13 04:57:20,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:20,054 INFO L93 Difference]: Finished difference Result 530 states and 553 transitions. [2020-10-13 04:57:20,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 04:57:20,054 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 275 [2020-10-13 04:57:20,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:20,056 INFO L225 Difference]: With dead ends: 530 [2020-10-13 04:57:20,057 INFO L226 Difference]: Without dead ends: 288 [2020-10-13 04:57:20,058 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 04:57:20,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-10-13 04:57:20,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2020-10-13 04:57:20,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-10-13 04:57:20,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 296 transitions. [2020-10-13 04:57:20,066 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 296 transitions. Word has length 275 [2020-10-13 04:57:20,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:20,066 INFO L479 AbstractCegarLoop]: Abstraction has 288 states and 296 transitions. [2020-10-13 04:57:20,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 04:57:20,067 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 296 transitions. [2020-10-13 04:57:20,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-10-13 04:57:20,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:20,069 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:20,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 04:57:20,069 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:20,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:20,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1570594274, now seen corresponding path program 32 times [2020-10-13 04:57:20,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:20,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126526547] [2020-10-13 04:57:20,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:20,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:20,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:20,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:20,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:20,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:20,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:25,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:25,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 291 [2020-10-13 04:57:25,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:57:25,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-13 04:57:25,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:25,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 04:57:25,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 147 [2020-10-13 04:57:25,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:57:25,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:25,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:25,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:25,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:25,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:25,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:25,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:25,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:25,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:25,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:25,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:25,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:25,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:25,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4224 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 3696 trivial. 0 not checked. [2020-10-13 04:57:25,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126526547] [2020-10-13 04:57:25,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:25,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 04:57:25,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670138734] [2020-10-13 04:57:25,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 04:57:25,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:25,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 04:57:25,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:57:25,896 INFO L87 Difference]: Start difference. First operand 288 states and 296 transitions. Second operand 36 states. [2020-10-13 04:57:26,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:26,691 INFO L93 Difference]: Finished difference Result 545 states and 568 transitions. [2020-10-13 04:57:26,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 04:57:26,692 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 283 [2020-10-13 04:57:26,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:26,694 INFO L225 Difference]: With dead ends: 545 [2020-10-13 04:57:26,695 INFO L226 Difference]: Without dead ends: 296 [2020-10-13 04:57:26,697 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 04:57:26,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-10-13 04:57:26,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2020-10-13 04:57:26,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-10-13 04:57:26,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 304 transitions. [2020-10-13 04:57:26,705 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 304 transitions. Word has length 283 [2020-10-13 04:57:26,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:26,705 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 304 transitions. [2020-10-13 04:57:26,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 04:57:26,705 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 304 transitions. [2020-10-13 04:57:26,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2020-10-13 04:57:26,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:26,708 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:26,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 04:57:26,708 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:26,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:26,708 INFO L82 PathProgramCache]: Analyzing trace with hash -903754086, now seen corresponding path program 33 times [2020-10-13 04:57:26,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:26,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886411914] [2020-10-13 04:57:26,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:26,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:26,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:26,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:27,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:27,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:27,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:31,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:31,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 299 [2020-10-13 04:57:31,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:57:31,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 04:57:31,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:31,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 04:57:31,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-13 04:57:31,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 04:57:31,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:32,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:32,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:32,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:32,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:32,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:32,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:32,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:32,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:32,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:32,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:32,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:32,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:32,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4488 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 3927 trivial. 0 not checked. [2020-10-13 04:57:32,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886411914] [2020-10-13 04:57:32,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:32,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 04:57:32,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110320080] [2020-10-13 04:57:32,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 04:57:32,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:32,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 04:57:32,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:57:32,563 INFO L87 Difference]: Start difference. First operand 296 states and 304 transitions. Second operand 37 states. [2020-10-13 04:57:33,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:33,425 INFO L93 Difference]: Finished difference Result 560 states and 583 transitions. [2020-10-13 04:57:33,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 04:57:33,426 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 291 [2020-10-13 04:57:33,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:33,427 INFO L225 Difference]: With dead ends: 560 [2020-10-13 04:57:33,427 INFO L226 Difference]: Without dead ends: 304 [2020-10-13 04:57:33,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:57:33,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-13 04:57:33,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2020-10-13 04:57:33,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-10-13 04:57:33,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 312 transitions. [2020-10-13 04:57:33,438 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 312 transitions. Word has length 291 [2020-10-13 04:57:33,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:33,438 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 312 transitions. [2020-10-13 04:57:33,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 04:57:33,438 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 312 transitions. [2020-10-13 04:57:33,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-10-13 04:57:33,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:33,440 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:33,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 04:57:33,441 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:33,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:33,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1784312990, now seen corresponding path program 34 times [2020-10-13 04:57:33,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:33,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651711232] [2020-10-13 04:57:33,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:33,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:33,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:33,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:33,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:34,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:34,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:38,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:38,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 307 [2020-10-13 04:57:38,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:57:38,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-13 04:57:38,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:38,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 04:57:38,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:57:38,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 04:57:38,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:39,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:39,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:39,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:39,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:39,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:39,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:39,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:39,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:39,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:39,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:39,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:39,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:39,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4760 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 4165 trivial. 0 not checked. [2020-10-13 04:57:39,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651711232] [2020-10-13 04:57:39,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:39,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 04:57:39,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746447061] [2020-10-13 04:57:39,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 04:57:39,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:39,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 04:57:39,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:57:39,369 INFO L87 Difference]: Start difference. First operand 304 states and 312 transitions. Second operand 38 states. [2020-10-13 04:57:40,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:40,213 INFO L93 Difference]: Finished difference Result 575 states and 598 transitions. [2020-10-13 04:57:40,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 04:57:40,213 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 299 [2020-10-13 04:57:40,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:40,215 INFO L225 Difference]: With dead ends: 575 [2020-10-13 04:57:40,215 INFO L226 Difference]: Without dead ends: 312 [2020-10-13 04:57:40,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:57:40,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-13 04:57:40,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2020-10-13 04:57:40,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-10-13 04:57:40,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 320 transitions. [2020-10-13 04:57:40,223 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 320 transitions. Word has length 299 [2020-10-13 04:57:40,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:40,224 INFO L479 AbstractCegarLoop]: Abstraction has 312 states and 320 transitions. [2020-10-13 04:57:40,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 04:57:40,224 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 320 transitions. [2020-10-13 04:57:40,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-10-13 04:57:40,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:40,226 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:40,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 04:57:40,227 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:40,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:40,227 INFO L82 PathProgramCache]: Analyzing trace with hash -808626918, now seen corresponding path program 35 times [2020-10-13 04:57:40,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:40,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610211232] [2020-10-13 04:57:40,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:40,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:40,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:40,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:40,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:41,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:41,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:45,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:45,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 315 [2020-10-13 04:57:45,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:57:45,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-13 04:57:45,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:45,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 04:57:45,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:57:45,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 04:57:45,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:46,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:46,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:46,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:46,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:46,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:46,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:46,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:46,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:46,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:46,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:46,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:46,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:46,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5040 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 4410 trivial. 0 not checked. [2020-10-13 04:57:46,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610211232] [2020-10-13 04:57:46,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:46,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 04:57:46,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799260480] [2020-10-13 04:57:46,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 04:57:46,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:46,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 04:57:46,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 04:57:46,191 INFO L87 Difference]: Start difference. First operand 312 states and 320 transitions. Second operand 39 states. [2020-10-13 04:57:47,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:47,010 INFO L93 Difference]: Finished difference Result 590 states and 613 transitions. [2020-10-13 04:57:47,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 04:57:47,011 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 307 [2020-10-13 04:57:47,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:47,013 INFO L225 Difference]: With dead ends: 590 [2020-10-13 04:57:47,013 INFO L226 Difference]: Without dead ends: 320 [2020-10-13 04:57:47,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 04:57:47,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-10-13 04:57:47,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2020-10-13 04:57:47,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2020-10-13 04:57:47,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 328 transitions. [2020-10-13 04:57:47,023 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 328 transitions. Word has length 307 [2020-10-13 04:57:47,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:47,024 INFO L479 AbstractCegarLoop]: Abstraction has 320 states and 328 transitions. [2020-10-13 04:57:47,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 04:57:47,024 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 328 transitions. [2020-10-13 04:57:47,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2020-10-13 04:57:47,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:47,026 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:47,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 04:57:47,027 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:47,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:47,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1196992286, now seen corresponding path program 36 times [2020-10-13 04:57:47,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:47,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18075461] [2020-10-13 04:57:47,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:47,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:47,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:47,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:47,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:47,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:47,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:52,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:52,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-13 04:57:52,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:57:52,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-13 04:57:52,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:52,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 04:57:52,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 04:57:52,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:57:52,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:52,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:52,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:52,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:52,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:52,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:52,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:52,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:52,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:52,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:52,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:52,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:52,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:53,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5328 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 4662 trivial. 0 not checked. [2020-10-13 04:57:53,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18075461] [2020-10-13 04:57:53,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:53,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 04:57:53,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528185039] [2020-10-13 04:57:53,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 04:57:53,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:53,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 04:57:53,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 04:57:53,020 INFO L87 Difference]: Start difference. First operand 320 states and 328 transitions. Second operand 40 states. [2020-10-13 04:57:53,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:53,940 INFO L93 Difference]: Finished difference Result 605 states and 628 transitions. [2020-10-13 04:57:53,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 04:57:53,941 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 315 [2020-10-13 04:57:53,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:53,943 INFO L225 Difference]: With dead ends: 605 [2020-10-13 04:57:53,943 INFO L226 Difference]: Without dead ends: 328 [2020-10-13 04:57:53,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 04:57:53,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-13 04:57:53,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 328. [2020-10-13 04:57:53,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-10-13 04:57:53,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 336 transitions. [2020-10-13 04:57:53,954 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 336 transitions. Word has length 315 [2020-10-13 04:57:53,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:53,954 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 336 transitions. [2020-10-13 04:57:53,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 04:57:53,955 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 336 transitions. [2020-10-13 04:57:53,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-13 04:57:53,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:53,957 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:53,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 04:57:53,957 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:53,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:53,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1127875686, now seen corresponding path program 37 times [2020-10-13 04:57:53,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:53,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087165343] [2020-10-13 04:57:53,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:53,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:54,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:54,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:54,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:54,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:54,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:58,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:58,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 331 [2020-10-13 04:57:58,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:57:58,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 04:57:58,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:58,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 04:57:58,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 128 [2020-10-13 04:57:58,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 04:57:58,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:59,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:59,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:59,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:59,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:59,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:59,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:59,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:58:00,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:00,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:00,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:00,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:00,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:00,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5624 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 4921 trivial. 0 not checked. [2020-10-13 04:58:00,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087165343] [2020-10-13 04:58:00,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:00,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 04:58:00,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355960400] [2020-10-13 04:58:00,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 04:58:00,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:00,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 04:58:00,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 04:58:00,037 INFO L87 Difference]: Start difference. First operand 328 states and 336 transitions. Second operand 41 states. [2020-10-13 04:58:00,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:00,973 INFO L93 Difference]: Finished difference Result 620 states and 643 transitions. [2020-10-13 04:58:00,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 04:58:00,974 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 323 [2020-10-13 04:58:00,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:00,976 INFO L225 Difference]: With dead ends: 620 [2020-10-13 04:58:00,976 INFO L226 Difference]: Without dead ends: 336 [2020-10-13 04:58:00,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 04:58:00,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-10-13 04:58:00,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 336. [2020-10-13 04:58:00,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-13 04:58:00,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 344 transitions. [2020-10-13 04:58:00,986 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 344 transitions. Word has length 323 [2020-10-13 04:58:00,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:00,986 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 344 transitions. [2020-10-13 04:58:00,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 04:58:00,986 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 344 transitions. [2020-10-13 04:58:00,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-13 04:58:00,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:00,988 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:00,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 04:58:00,988 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:00,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:00,989 INFO L82 PathProgramCache]: Analyzing trace with hash 876427678, now seen corresponding path program 38 times [2020-10-13 04:58:00,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:00,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664376176] [2020-10-13 04:58:00,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:01,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:01,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:01,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:01,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:01,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:01,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:06,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:06,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 339 [2020-10-13 04:58:06,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:58:06,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 04:58:06,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:06,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 04:58:06,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-13 04:58:06,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 04:58:06,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:06,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:06,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:06,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:07,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:07,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:07,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:07,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:58:07,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:07,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:07,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:07,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:07,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:07,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5928 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 5187 trivial. 0 not checked. [2020-10-13 04:58:07,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664376176] [2020-10-13 04:58:07,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:07,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 04:58:07,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961829940] [2020-10-13 04:58:07,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 04:58:07,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:07,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 04:58:07,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 04:58:07,040 INFO L87 Difference]: Start difference. First operand 336 states and 344 transitions. Second operand 42 states. [2020-10-13 04:58:08,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:08,018 INFO L93 Difference]: Finished difference Result 635 states and 658 transitions. [2020-10-13 04:58:08,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 04:58:08,019 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 331 [2020-10-13 04:58:08,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:08,021 INFO L225 Difference]: With dead ends: 635 [2020-10-13 04:58:08,021 INFO L226 Difference]: Without dead ends: 344 [2020-10-13 04:58:08,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 04:58:08,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-10-13 04:58:08,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2020-10-13 04:58:08,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-10-13 04:58:08,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 352 transitions. [2020-10-13 04:58:08,032 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 352 transitions. Word has length 331 [2020-10-13 04:58:08,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:08,032 INFO L479 AbstractCegarLoop]: Abstraction has 344 states and 352 transitions. [2020-10-13 04:58:08,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 04:58:08,033 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 352 transitions. [2020-10-13 04:58:08,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-10-13 04:58:08,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:08,035 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:08,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 04:58:08,035 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:08,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:08,036 INFO L82 PathProgramCache]: Analyzing trace with hash -257179110, now seen corresponding path program 39 times [2020-10-13 04:58:08,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:08,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114841792] [2020-10-13 04:58:08,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:08,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:08,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:08,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:08,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:08,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:09,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:13,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:13,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 347 [2020-10-13 04:58:13,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:58:13,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5065 [2020-10-13 04:58:13,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:13,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 04:58:13,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 175 [2020-10-13 04:58:13,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 04:58:13,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:14,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:14,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:14,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:14,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:14,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:14,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:14,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:14,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:14,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:14,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:14,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:14,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:14,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6240 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 5460 trivial. 0 not checked. [2020-10-13 04:58:14,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114841792] [2020-10-13 04:58:14,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:14,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 04:58:14,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151075026] [2020-10-13 04:58:14,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 04:58:14,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:14,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 04:58:14,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 04:58:14,232 INFO L87 Difference]: Start difference. First operand 344 states and 352 transitions. Second operand 43 states. [2020-10-13 04:58:15,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:15,100 INFO L93 Difference]: Finished difference Result 650 states and 673 transitions. [2020-10-13 04:58:15,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 04:58:15,100 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 339 [2020-10-13 04:58:15,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:15,102 INFO L225 Difference]: With dead ends: 650 [2020-10-13 04:58:15,102 INFO L226 Difference]: Without dead ends: 352 [2020-10-13 04:58:15,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 04:58:15,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-10-13 04:58:15,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2020-10-13 04:58:15,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-10-13 04:58:15,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 360 transitions. [2020-10-13 04:58:15,113 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 360 transitions. Word has length 339 [2020-10-13 04:58:15,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:15,113 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 360 transitions. [2020-10-13 04:58:15,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 04:58:15,114 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 360 transitions. [2020-10-13 04:58:15,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2020-10-13 04:58:15,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:15,116 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:15,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 04:58:15,117 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:15,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:15,117 INFO L82 PathProgramCache]: Analyzing trace with hash 770190366, now seen corresponding path program 40 times [2020-10-13 04:58:15,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:15,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043076488] [2020-10-13 04:58:15,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:15,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:15,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:15,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:15,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:16,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking...