/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_copy6_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:46:09,819 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:46:09,822 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:46:09,846 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:46:09,846 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:46:09,847 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:46:09,849 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:46:09,851 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:46:09,853 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:46:09,854 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:46:09,855 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:46:09,856 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:46:09,856 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:46:09,857 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:46:09,858 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:46:09,859 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:46:09,860 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:46:09,861 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:46:09,863 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:46:09,865 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:46:09,866 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:46:09,867 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:46:09,868 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:46:09,869 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:46:09,872 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:46:09,872 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:46:09,872 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:46:09,873 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:46:09,874 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:46:09,875 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:46:09,875 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:46:09,876 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:46:09,876 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:46:09,877 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:46:09,878 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:46:09,879 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:46:09,879 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:46:09,879 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:46:09,880 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:46:09,881 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:46:09,881 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:46:09,882 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 04:46:09,905 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:46:09,905 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:46:09,906 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:46:09,907 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:46:09,907 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:46:09,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:46:09,907 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:46:09,908 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:46:09,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:46:09,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:46:09,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:46:09,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:46:09,909 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:46:09,909 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:46:09,909 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:46:09,909 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:46:09,909 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:46:09,910 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:46:09,910 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:46:09,910 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:46:09,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:46:09,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:46:09,911 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:46:09,911 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:46:09,911 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:46:09,911 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:46:09,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:46:09,912 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:46:09,912 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:46:09,912 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 04:46:10,266 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:46:10,284 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:46:10,289 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:46:10,293 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:46:10,294 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:46:10,295 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy6_ground-1.i [2020-10-13 04:46:10,372 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/488d68a4d/58901e3019aa47399afca42e18afebbb/FLAG6846b9cfa [2020-10-13 04:46:10,858 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:46:10,859 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy6_ground-1.i [2020-10-13 04:46:10,867 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/488d68a4d/58901e3019aa47399afca42e18afebbb/FLAG6846b9cfa [2020-10-13 04:46:11,227 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/488d68a4d/58901e3019aa47399afca42e18afebbb [2020-10-13 04:46:11,237 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:46:11,239 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:46:11,240 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:46:11,240 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:46:11,245 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:46:11,246 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:46:11" (1/1) ... [2020-10-13 04:46:11,249 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2eef8159 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:11, skipping insertion in model container [2020-10-13 04:46:11,250 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:46:11" (1/1) ... [2020-10-13 04:46:11,259 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:46:11,283 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:46:11,506 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:46:11,516 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:46:11,587 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:46:11,740 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:46:11,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:11 WrapperNode [2020-10-13 04:46:11,740 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:46:11,741 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:46:11,741 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:46:11,742 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:46:11,756 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:11" (1/1) ... [2020-10-13 04:46:11,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:11" (1/1) ... [2020-10-13 04:46:11,766 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:11" (1/1) ... [2020-10-13 04:46:11,766 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:11" (1/1) ... [2020-10-13 04:46:11,778 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:11" (1/1) ... [2020-10-13 04:46:11,785 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:11" (1/1) ... [2020-10-13 04:46:11,787 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:11" (1/1) ... [2020-10-13 04:46:11,790 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:46:11,791 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:46:11,791 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:46:11,791 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:46:11,792 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:11" (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 04:46:11,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:46:11,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:46:11,863 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 04:46:11,864 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:46:11,864 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:46:11,864 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:46:11,864 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 04:46:11,864 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:46:11,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 04:46:11,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:46:11,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:46:11,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:46:11,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:46:11,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:46:12,194 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:46:12,194 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-13 04:46:12,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:46:12 BoogieIcfgContainer [2020-10-13 04:46:12,199 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:46:12,200 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:46:12,200 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:46:12,204 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:46:12,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:46:11" (1/3) ... [2020-10-13 04:46:12,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13cd7940 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:46:12, skipping insertion in model container [2020-10-13 04:46:12,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:11" (2/3) ... [2020-10-13 04:46:12,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13cd7940 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:46:12, skipping insertion in model container [2020-10-13 04:46:12,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:46:12" (3/3) ... [2020-10-13 04:46:12,208 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy6_ground-1.i [2020-10-13 04:46:12,233 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:46:12,248 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:46:12,280 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:46:12,339 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:46:12,340 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:46:12,340 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:46:12,340 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:46:12,343 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:46:12,343 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:46:12,343 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:46:12,343 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:46:12,388 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-10-13 04:46:12,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 04:46:12,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:12,403 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] [2020-10-13 04:46:12,403 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:12,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:12,410 INFO L82 PathProgramCache]: Analyzing trace with hash 772526198, now seen corresponding path program 1 times [2020-10-13 04:46:12,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:12,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853151696] [2020-10-13 04:46:12,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:12,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:12,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:12,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:12,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:12,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:12,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:12,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:12,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:14,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:14,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 04:46:14,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 04:46:14,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1562 [2020-10-13 04:46:14,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:14,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:14,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 04:46:14,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:14,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 04:46:14,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:14,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:14,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:14,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:14,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:14,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:14,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 04:46:14,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:14,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:14,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:14,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:14,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 04:46:14,229 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 04:46:14,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853151696] [2020-10-13 04:46:14,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:46:14,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 04:46:14,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502507751] [2020-10-13 04:46:14,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 04:46:14,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:14,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 04:46:14,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:46:14,262 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 3 states. [2020-10-13 04:46:14,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:14,439 INFO L93 Difference]: Finished difference Result 76 states and 107 transitions. [2020-10-13 04:46:14,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 04:46:14,441 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-10-13 04:46:14,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:14,453 INFO L225 Difference]: With dead ends: 76 [2020-10-13 04:46:14,454 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 04:46:14,458 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 04:46:14,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 04:46:14,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-13 04:46:14,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 04:46:14,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2020-10-13 04:46:14,511 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 25 [2020-10-13 04:46:14,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:14,512 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2020-10-13 04:46:14,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 04:46:14,512 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2020-10-13 04:46:14,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 04:46:14,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:14,514 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] [2020-10-13 04:46:14,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:46:14,515 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:14,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:14,516 INFO L82 PathProgramCache]: Analyzing trace with hash 514335338, now seen corresponding path program 1 times [2020-10-13 04:46:14,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:14,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511963958] [2020-10-13 04:46:14,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:14,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:14,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:14,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:14,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:14,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:14,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:14,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:14,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:16,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:16,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 04:46:16,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 04:46:16,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2225 [2020-10-13 04:46:16,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:16,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:46:16,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 04:46:16,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:46:16,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:46:16,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:16,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:16,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:16,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:16,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:16,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:16,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:46:16,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:16,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:16,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:16,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:16,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:16,808 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 04:46:16,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511963958] [2020-10-13 04:46:16,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:46:16,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:46:16,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825963020] [2020-10-13 04:46:16,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:46:16,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:16,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:46:16,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:46:16,813 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 4 states. [2020-10-13 04:46:16,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:16,964 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2020-10-13 04:46:16,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:46:16,965 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-13 04:46:16,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:16,966 INFO L225 Difference]: With dead ends: 75 [2020-10-13 04:46:16,966 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 04:46:16,968 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 04:46:16,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 04:46:16,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-10-13 04:46:16,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 04:46:16,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2020-10-13 04:46:16,978 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 25 [2020-10-13 04:46:16,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:16,978 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2020-10-13 04:46:16,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:46:16,979 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2020-10-13 04:46:16,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 04:46:16,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:16,980 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:16,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:46:16,981 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:16,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:16,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1854451550, now seen corresponding path program 1 times [2020-10-13 04:46:16,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:16,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14964933] [2020-10-13 04:46:16,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:16,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:17,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:17,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:17,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:17,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:17,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:17,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:17,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:22,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:22,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 04:46:22,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 04:46:22,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 04:46:22,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:22,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:46:22,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:46:22,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:46:22,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:46:22,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:22,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:22,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:22,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:22,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:22,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:22,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:46:22,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:22,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:22,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:22,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:22,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:46:22,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 04:46:22,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14964933] [2020-10-13 04:46:22,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:46:22,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:46:22,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093923656] [2020-10-13 04:46:22,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:46:22,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:22,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:46:22,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:46:22,057 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 4 states. [2020-10-13 04:46:22,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:22,183 INFO L93 Difference]: Finished difference Result 80 states and 94 transitions. [2020-10-13 04:46:22,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:46:22,183 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-10-13 04:46:22,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:22,184 INFO L225 Difference]: With dead ends: 80 [2020-10-13 04:46:22,184 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 04:46:22,185 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 04:46:22,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 04:46:22,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-13 04:46:22,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 04:46:22,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-10-13 04:46:22,193 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 37 [2020-10-13 04:46:22,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:22,193 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-10-13 04:46:22,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:46:22,194 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-10-13 04:46:22,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 04:46:22,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:22,195 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:22,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:46:22,196 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:22,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:22,196 INFO L82 PathProgramCache]: Analyzing trace with hash 342802812, now seen corresponding path program 1 times [2020-10-13 04:46:22,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:22,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078145519] [2020-10-13 04:46:22,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:22,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:22,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:22,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:22,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:22,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:22,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:22,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:22,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:27,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:27,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 04:46:27,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 04:46:27,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:46:27,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:27,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:46:27,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 04:46:27,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:46:27,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:27,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:27,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:27,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:27,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:27,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:27,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:27,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:46:27,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:27,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:27,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:27,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:27,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:46:27,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 04:46:27,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078145519] [2020-10-13 04:46:27,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:27,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:46:27,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59964799] [2020-10-13 04:46:27,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:46:27,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:27,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:46:27,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:46:27,272 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 5 states. [2020-10-13 04:46:27,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:27,497 INFO L93 Difference]: Finished difference Result 93 states and 111 transitions. [2020-10-13 04:46:27,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:46:27,498 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2020-10-13 04:46:27,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:27,499 INFO L225 Difference]: With dead ends: 93 [2020-10-13 04:46:27,499 INFO L226 Difference]: Without dead ends: 62 [2020-10-13 04:46:27,501 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 04:46:27,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-13 04:46:27,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2020-10-13 04:46:27,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 04:46:27,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2020-10-13 04:46:27,510 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 39 [2020-10-13 04:46:27,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:27,510 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2020-10-13 04:46:27,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:46:27,511 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2020-10-13 04:46:27,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 04:46:27,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:27,513 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:27,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:46:27,514 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:27,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:27,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1643113616, now seen corresponding path program 2 times [2020-10-13 04:46:27,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:27,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699033007] [2020-10-13 04:46:27,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:27,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:27,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:27,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:27,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:27,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:27,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:27,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:32,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:32,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 04:46:32,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:46:32,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 04:46:32,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:32,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:46:32,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:46:32,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:46:32,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:46:32,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:32,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:32,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:32,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:32,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:32,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:32,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 04:46:32,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:32,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:32,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:32,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:32,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:46:32,618 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-13 04:46:32,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699033007] [2020-10-13 04:46:32,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:32,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:46:32,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506268163] [2020-10-13 04:46:32,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:46:32,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:32,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:46:32,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:46:32,624 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 5 states. [2020-10-13 04:46:32,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:32,825 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2020-10-13 04:46:32,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:46:32,825 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2020-10-13 04:46:32,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:32,827 INFO L225 Difference]: With dead ends: 106 [2020-10-13 04:46:32,827 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 04:46:32,828 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 04:46:32,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 04:46:32,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-13 04:46:32,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 04:46:32,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2020-10-13 04:46:32,844 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 51 [2020-10-13 04:46:32,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:32,845 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2020-10-13 04:46:32,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:46:32,845 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2020-10-13 04:46:32,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 04:46:32,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:32,850 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:32,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:46:32,855 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:32,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:32,856 INFO L82 PathProgramCache]: Analyzing trace with hash -291170034, now seen corresponding path program 3 times [2020-10-13 04:46:32,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:32,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191228062] [2020-10-13 04:46:32,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:32,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:32,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:32,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:32,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:32,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:32,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:34,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:37,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:37,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 04:46:37,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:46:37,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 04:46:37,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:37,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:46:37,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:46:37,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:46:37,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:46:37,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:37,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:37,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:37,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:37,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:37,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:37,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:46:37,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:37,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:37,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:37,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:37,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:46:37,947 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-13 04:46:37,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191228062] [2020-10-13 04:46:37,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:37,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:46:37,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928467527] [2020-10-13 04:46:37,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:46:37,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:37,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:46:37,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:46:37,950 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand 6 states. [2020-10-13 04:46:38,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:38,058 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2020-10-13 04:46:38,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:46:38,059 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-10-13 04:46:38,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:38,060 INFO L225 Difference]: With dead ends: 108 [2020-10-13 04:46:38,060 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 04:46:38,061 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 04:46:38,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 04:46:38,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-10-13 04:46:38,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 04:46:38,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2020-10-13 04:46:38,069 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 53 [2020-10-13 04:46:38,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:38,069 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2020-10-13 04:46:38,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:46:38,069 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2020-10-13 04:46:38,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 04:46:38,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:38,070 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:38,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:46:38,071 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:38,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:38,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1846488876, now seen corresponding path program 4 times [2020-10-13 04:46:38,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:38,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218488730] [2020-10-13 04:46:38,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:38,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:38,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:38,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:38,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:38,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:38,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:38,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:43,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:43,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 04:46:43,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:46:43,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 04:46:43,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:43,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:46:43,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 04:46:43,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:46:43,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:43,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:43,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:43,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:43,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:43,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:43,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:43,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:46:43,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:43,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:43,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:43,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:43,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:43,160 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-10-13 04:46:43,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218488730] [2020-10-13 04:46:43,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:43,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:46:43,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142578117] [2020-10-13 04:46:43,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:46:43,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:43,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:46:43,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:46:43,162 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 6 states. [2020-10-13 04:46:43,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:43,356 INFO L93 Difference]: Finished difference Result 119 states and 137 transitions. [2020-10-13 04:46:43,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:46:43,357 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-13 04:46:43,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:43,358 INFO L225 Difference]: With dead ends: 119 [2020-10-13 04:46:43,358 INFO L226 Difference]: Without dead ends: 78 [2020-10-13 04:46:43,359 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 04:46:43,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-13 04:46:43,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2020-10-13 04:46:43,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 04:46:43,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2020-10-13 04:46:43,366 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 55 [2020-10-13 04:46:43,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:43,366 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2020-10-13 04:46:43,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:46:43,366 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2020-10-13 04:46:43,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 04:46:43,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:43,368 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2020-10-13 04:46:43,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:46:43,368 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:43,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:43,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1009666336, now seen corresponding path program 5 times [2020-10-13 04:46:43,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:43,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155257813] [2020-10-13 04:46:43,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:43,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:43,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:43,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:43,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:43,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:43,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:45,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:48,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:48,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 04:46:48,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:46:48,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:46:48,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:48,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:46:48,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 04:46:48,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:46:48,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:48,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:48,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:48,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:48,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:48,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:48,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:48,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:46:48,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:48,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:48,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:48,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:48,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:48,470 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-10-13 04:46:48,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155257813] [2020-10-13 04:46:48,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:48,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:46:48,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672312129] [2020-10-13 04:46:48,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:46:48,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:48,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:46:48,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:46:48,472 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand 7 states. [2020-10-13 04:46:48,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:48,690 INFO L93 Difference]: Finished difference Result 141 states and 159 transitions. [2020-10-13 04:46:48,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:46:48,691 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-13 04:46:48,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:48,692 INFO L225 Difference]: With dead ends: 141 [2020-10-13 04:46:48,692 INFO L226 Difference]: Without dead ends: 90 [2020-10-13 04:46:48,693 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 04:46:48,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-13 04:46:48,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2020-10-13 04:46:48,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 04:46:48,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2020-10-13 04:46:48,701 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 67 [2020-10-13 04:46:48,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:48,702 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2020-10-13 04:46:48,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:46:48,702 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2020-10-13 04:46:48,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 04:46:48,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:48,703 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:48,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:46:48,704 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:48,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:48,704 INFO L82 PathProgramCache]: Analyzing trace with hash -434445036, now seen corresponding path program 6 times [2020-10-13 04:46:48,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:48,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809860870] [2020-10-13 04:46:48,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:48,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:48,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:48,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:48,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:48,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:48,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:53,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:53,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 04:46:53,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:46:53,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 04:46:53,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:53,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:46:53,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:46:53,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:46:53,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:53,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:53,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:53,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:53,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:53,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:53,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:53,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:46:53,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:53,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:53,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:53,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:53,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:53,791 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-10-13 04:46:53,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809860870] [2020-10-13 04:46:53,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:53,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:46:53,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82834143] [2020-10-13 04:46:53,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:46:53,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:53,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:46:53,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:46:53,794 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand 7 states. [2020-10-13 04:46:53,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:53,892 INFO L93 Difference]: Finished difference Result 158 states and 172 transitions. [2020-10-13 04:46:53,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:46:53,893 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 79 [2020-10-13 04:46:53,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:53,894 INFO L225 Difference]: With dead ends: 158 [2020-10-13 04:46:53,894 INFO L226 Difference]: Without dead ends: 87 [2020-10-13 04:46:53,895 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 04:46:53,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-13 04:46:53,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-10-13 04:46:53,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-13 04:46:53,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2020-10-13 04:46:53,901 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 79 [2020-10-13 04:46:53,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:53,902 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2020-10-13 04:46:53,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:46:53,902 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2020-10-13 04:46:53,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 04:46:53,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:53,903 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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] [2020-10-13 04:46:53,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 04:46:53,903 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:53,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:53,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1140158898, now seen corresponding path program 7 times [2020-10-13 04:46:53,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:53,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075390067] [2020-10-13 04:46:53,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:53,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:53,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:53,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:53,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:53,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:54,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:58,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:58,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 04:46:58,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:46:58,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-13 04:46:58,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:58,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:46:58,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 04:46:58,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:46:58,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:58,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:58,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:59,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:59,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:59,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:59,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:59,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:46:59,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:59,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:59,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:59,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:59,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:59,009 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-10-13 04:46:59,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075390067] [2020-10-13 04:46:59,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:59,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:46:59,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805466763] [2020-10-13 04:46:59,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:46:59,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:59,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:46:59,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:46:59,013 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand 8 states. [2020-10-13 04:46:59,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:59,270 INFO L93 Difference]: Finished difference Result 165 states and 183 transitions. [2020-10-13 04:46:59,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:46:59,271 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 81 [2020-10-13 04:46:59,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:59,272 INFO L225 Difference]: With dead ends: 165 [2020-10-13 04:46:59,272 INFO L226 Difference]: Without dead ends: 104 [2020-10-13 04:46:59,273 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 04:46:59,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-13 04:46:59,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2020-10-13 04:46:59,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-13 04:46:59,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 105 transitions. [2020-10-13 04:46:59,283 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 105 transitions. Word has length 81 [2020-10-13 04:46:59,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:59,284 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 105 transitions. [2020-10-13 04:46:59,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:46:59,284 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 105 transitions. [2020-10-13 04:46:59,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-13 04:46:59,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:59,290 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:59,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 04:46:59,291 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:59,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:59,292 INFO L82 PathProgramCache]: Analyzing trace with hash -888368474, now seen corresponding path program 8 times [2020-10-13 04:46:59,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:59,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389947768] [2020-10-13 04:46:59,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:59,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:59,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:59,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:59,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:59,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:59,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:04,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:04,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-13 04:47:04,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:47:04,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:47:04,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:04,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:47:04,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:47:04,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:47:04,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:04,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:04,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:04,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:04,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:04,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:04,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:04,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:04,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:04,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:04,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:04,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:04,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:04,375 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-10-13 04:47:04,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389947768] [2020-10-13 04:47:04,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:04,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:47:04,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452094526] [2020-10-13 04:47:04,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:47:04,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:04,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:47:04,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:47:04,378 INFO L87 Difference]: Start difference. First operand 98 states and 105 transitions. Second operand 8 states. [2020-10-13 04:47:04,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:04,525 INFO L93 Difference]: Finished difference Result 184 states and 198 transitions. [2020-10-13 04:47:04,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:47:04,526 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 93 [2020-10-13 04:47:04,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:04,527 INFO L225 Difference]: With dead ends: 184 [2020-10-13 04:47:04,527 INFO L226 Difference]: Without dead ends: 101 [2020-10-13 04:47:04,528 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 04:47:04,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-13 04:47:04,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-10-13 04:47:04,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 04:47:04,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2020-10-13 04:47:04,533 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 93 [2020-10-13 04:47:04,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:04,533 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2020-10-13 04:47:04,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:47:04,534 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2020-10-13 04:47:04,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-13 04:47:04,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:04,535 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 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] [2020-10-13 04:47:04,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 04:47:04,535 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:04,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:04,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1458418372, now seen corresponding path program 9 times [2020-10-13 04:47:04,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:04,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436464365] [2020-10-13 04:47:04,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:04,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:04,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:04,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:04,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:04,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:04,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:09,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:09,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 04:47:09,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:47:09,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:47:09,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:09,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:47:09,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 04:47:09,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:47:09,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:09,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:09,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:09,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:09,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:09,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:09,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:09,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:09,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:09,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:09,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:09,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:09,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:09,640 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-10-13 04:47:09,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436464365] [2020-10-13 04:47:09,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:09,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:47:09,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349537080] [2020-10-13 04:47:09,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:47:09,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:09,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:47:09,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:47:09,642 INFO L87 Difference]: Start difference. First operand 100 states and 107 transitions. Second operand 9 states. [2020-10-13 04:47:09,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:09,953 INFO L93 Difference]: Finished difference Result 189 states and 207 transitions. [2020-10-13 04:47:09,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:47:09,954 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 95 [2020-10-13 04:47:09,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:09,955 INFO L225 Difference]: With dead ends: 189 [2020-10-13 04:47:09,955 INFO L226 Difference]: Without dead ends: 118 [2020-10-13 04:47:09,956 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 04:47:09,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-13 04:47:09,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 112. [2020-10-13 04:47:09,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 04:47:09,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 119 transitions. [2020-10-13 04:47:09,966 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 119 transitions. Word has length 95 [2020-10-13 04:47:09,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:09,968 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 119 transitions. [2020-10-13 04:47:09,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:47:09,968 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 119 transitions. [2020-10-13 04:47:09,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 04:47:09,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:09,969 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:09,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 04:47:09,970 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:09,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:09,970 INFO L82 PathProgramCache]: Analyzing trace with hash -17655624, now seen corresponding path program 10 times [2020-10-13 04:47:09,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:09,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440065259] [2020-10-13 04:47:09,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:09,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:09,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:10,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:10,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:10,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:10,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:14,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:14,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 04:47:14,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:47:14,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:47:14,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:14,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:47:14,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:47:14,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:47:14,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:15,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:15,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:15,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:15,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:15,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:15,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:15,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:15,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:15,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:15,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:15,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:15,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:15,069 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-10-13 04:47:15,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440065259] [2020-10-13 04:47:15,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:15,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:47:15,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364542792] [2020-10-13 04:47:15,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:47:15,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:15,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:47:15,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:47:15,072 INFO L87 Difference]: Start difference. First operand 112 states and 119 transitions. Second operand 9 states. [2020-10-13 04:47:15,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:15,193 INFO L93 Difference]: Finished difference Result 210 states and 224 transitions. [2020-10-13 04:47:15,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:47:15,194 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 107 [2020-10-13 04:47:15,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:15,195 INFO L225 Difference]: With dead ends: 210 [2020-10-13 04:47:15,195 INFO L226 Difference]: Without dead ends: 115 [2020-10-13 04:47:15,198 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 04:47:15,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-13 04:47:15,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2020-10-13 04:47:15,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-13 04:47:15,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 121 transitions. [2020-10-13 04:47:15,205 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 121 transitions. Word has length 107 [2020-10-13 04:47:15,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:15,206 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 121 transitions. [2020-10-13 04:47:15,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:47:15,206 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 121 transitions. [2020-10-13 04:47:15,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-13 04:47:15,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:15,207 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 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] [2020-10-13 04:47:15,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 04:47:15,207 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:15,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:15,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1575867306, now seen corresponding path program 11 times [2020-10-13 04:47:15,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:15,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078486354] [2020-10-13 04:47:15,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:15,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:15,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:15,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:15,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:15,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:15,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:20,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:20,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-13 04:47:20,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:47:20,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:47:20,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:20,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:47:20,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 04:47:20,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:47:20,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:20,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:20,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:20,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:20,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:20,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:20,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:20,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:20,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:20,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:20,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:20,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:20,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:20,319 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-10-13 04:47:20,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078486354] [2020-10-13 04:47:20,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:20,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:47:20,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009097880] [2020-10-13 04:47:20,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:47:20,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:20,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:47:20,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:47:20,322 INFO L87 Difference]: Start difference. First operand 114 states and 121 transitions. Second operand 10 states. [2020-10-13 04:47:20,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:20,615 INFO L93 Difference]: Finished difference Result 213 states and 231 transitions. [2020-10-13 04:47:20,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:47:20,615 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 109 [2020-10-13 04:47:20,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:20,616 INFO L225 Difference]: With dead ends: 213 [2020-10-13 04:47:20,616 INFO L226 Difference]: Without dead ends: 132 [2020-10-13 04:47:20,621 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 04:47:20,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-13 04:47:20,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 126. [2020-10-13 04:47:20,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-13 04:47:20,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 133 transitions. [2020-10-13 04:47:20,631 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 133 transitions. Word has length 109 [2020-10-13 04:47:20,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:20,632 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 133 transitions. [2020-10-13 04:47:20,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:47:20,632 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 133 transitions. [2020-10-13 04:47:20,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-13 04:47:20,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:20,633 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:20,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 04:47:20,634 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:20,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:20,634 INFO L82 PathProgramCache]: Analyzing trace with hash -870836406, now seen corresponding path program 12 times [2020-10-13 04:47:20,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:20,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637289484] [2020-10-13 04:47:20,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:20,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:20,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:20,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:20,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:20,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:21,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:25,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:25,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-13 04:47:25,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:47:25,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-13 04:47:25,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:25,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:47:25,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:47:25,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:47:25,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:25,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:25,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:25,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:25,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:25,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:25,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:25,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:25,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:25,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:25,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:25,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:25,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:25,781 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2020-10-13 04:47:25,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637289484] [2020-10-13 04:47:25,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:25,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:47:25,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221312553] [2020-10-13 04:47:25,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:47:25,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:25,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:47:25,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:47:25,783 INFO L87 Difference]: Start difference. First operand 126 states and 133 transitions. Second operand 10 states. [2020-10-13 04:47:25,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:25,910 INFO L93 Difference]: Finished difference Result 236 states and 250 transitions. [2020-10-13 04:47:25,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:47:25,913 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 121 [2020-10-13 04:47:25,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:25,914 INFO L225 Difference]: With dead ends: 236 [2020-10-13 04:47:25,915 INFO L226 Difference]: Without dead ends: 129 [2020-10-13 04:47:25,915 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 04:47:25,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-13 04:47:25,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2020-10-13 04:47:25,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-13 04:47:25,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 135 transitions. [2020-10-13 04:47:25,924 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 135 transitions. Word has length 121 [2020-10-13 04:47:25,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:25,925 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 135 transitions. [2020-10-13 04:47:25,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:47:25,926 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 135 transitions. [2020-10-13 04:47:25,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-13 04:47:25,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:25,927 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 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] [2020-10-13 04:47:25,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 04:47:25,927 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:25,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:25,928 INFO L82 PathProgramCache]: Analyzing trace with hash -2140799384, now seen corresponding path program 13 times [2020-10-13 04:47:25,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:25,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756005963] [2020-10-13 04:47:25,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:25,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:25,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:25,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:25,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:26,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:26,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:31,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:31,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-13 04:47:31,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:47:31,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5064 [2020-10-13 04:47:31,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:31,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:47:31,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:47:31,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:47:31,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:31,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:31,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:31,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:31,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:31,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:31,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:31,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:31,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:31,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:31,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:31,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:31,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:31,095 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2020-10-13 04:47:31,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756005963] [2020-10-13 04:47:31,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:31,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:47:31,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045225792] [2020-10-13 04:47:31,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:47:31,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:31,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:47:31,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:47:31,097 INFO L87 Difference]: Start difference. First operand 128 states and 135 transitions. Second operand 11 states. [2020-10-13 04:47:31,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:31,249 INFO L93 Difference]: Finished difference Result 238 states and 252 transitions. [2020-10-13 04:47:31,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:47:31,250 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 123 [2020-10-13 04:47:31,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:31,251 INFO L225 Difference]: With dead ends: 238 [2020-10-13 04:47:31,252 INFO L226 Difference]: Without dead ends: 131 [2020-10-13 04:47:31,253 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 04:47:31,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-13 04:47:31,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2020-10-13 04:47:31,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-13 04:47:31,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 137 transitions. [2020-10-13 04:47:31,259 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 137 transitions. Word has length 123 [2020-10-13 04:47:31,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:31,259 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 137 transitions. [2020-10-13 04:47:31,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:47:31,259 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 137 transitions. [2020-10-13 04:47:31,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-13 04:47:31,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:31,261 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 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] [2020-10-13 04:47:31,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 04:47:31,261 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:31,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:31,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1490458118, now seen corresponding path program 14 times [2020-10-13 04:47:31,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:31,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725325385] [2020-10-13 04:47:31,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:31,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:31,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:31,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:31,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:31,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:31,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:36,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:36,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-13 04:47:36,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:47:36,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-13 04:47:36,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:36,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:47:36,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-13 04:47:36,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:47:36,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:36,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:36,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:36,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:36,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:36,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:36,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:36,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:36,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:36,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:36,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:36,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:36,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:36,405 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2020-10-13 04:47:36,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725325385] [2020-10-13 04:47:36,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:36,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:47:36,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417129116] [2020-10-13 04:47:36,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:47:36,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:36,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:47:36,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:47:36,407 INFO L87 Difference]: Start difference. First operand 130 states and 137 transitions. Second operand 11 states. [2020-10-13 04:47:36,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:36,794 INFO L93 Difference]: Finished difference Result 239 states and 257 transitions. [2020-10-13 04:47:36,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:47:36,795 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 125 [2020-10-13 04:47:36,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:36,797 INFO L225 Difference]: With dead ends: 239 [2020-10-13 04:47:36,797 INFO L226 Difference]: Without dead ends: 148 [2020-10-13 04:47:36,798 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 04:47:36,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-13 04:47:36,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 142. [2020-10-13 04:47:36,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-13 04:47:36,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 149 transitions. [2020-10-13 04:47:36,803 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 149 transitions. Word has length 125 [2020-10-13 04:47:36,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:36,804 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 149 transitions. [2020-10-13 04:47:36,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:47:36,804 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 149 transitions. [2020-10-13 04:47:36,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-13 04:47:36,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:36,805 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 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] [2020-10-13 04:47:36,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 04:47:36,805 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:36,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:36,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1291077882, now seen corresponding path program 15 times [2020-10-13 04:47:36,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:36,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956206809] [2020-10-13 04:47:36,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:36,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:36,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:36,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:36,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:36,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:37,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:41,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:41,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-13 04:47:41,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:47:41,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5091 [2020-10-13 04:47:41,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:41,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:47:41,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-13 04:47:41,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:47:41,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:42,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:42,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:42,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:42,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:42,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:42,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:42,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:42,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:42,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:42,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:42,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:42,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:42,025 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2020-10-13 04:47:42,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956206809] [2020-10-13 04:47:42,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:42,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:47:42,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611161542] [2020-10-13 04:47:42,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:47:42,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:42,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:47:42,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:47:42,027 INFO L87 Difference]: Start difference. First operand 142 states and 149 transitions. Second operand 12 states. [2020-10-13 04:47:42,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:42,365 INFO L93 Difference]: Finished difference Result 261 states and 279 transitions. [2020-10-13 04:47:42,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:47:42,365 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 137 [2020-10-13 04:47:42,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:42,366 INFO L225 Difference]: With dead ends: 261 [2020-10-13 04:47:42,367 INFO L226 Difference]: Without dead ends: 160 [2020-10-13 04:47:42,368 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 04:47:42,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-13 04:47:42,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 154. [2020-10-13 04:47:42,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-13 04:47:42,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 161 transitions. [2020-10-13 04:47:42,374 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 161 transitions. Word has length 137 [2020-10-13 04:47:42,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:42,374 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 161 transitions. [2020-10-13 04:47:42,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:47:42,375 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 161 transitions. [2020-10-13 04:47:42,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-13 04:47:42,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:42,376 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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] [2020-10-13 04:47:42,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 04:47:42,376 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:42,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:42,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1467350510, now seen corresponding path program 16 times [2020-10-13 04:47:42,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:42,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948334637] [2020-10-13 04:47:42,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:42,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:42,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:42,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:42,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:42,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:43,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:47,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:47,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-13 04:47:47,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:47:47,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-13 04:47:47,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:47,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:47:47,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:47:47,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:47:47,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:47,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:47,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:47,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:47,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:47,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:47,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:47,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:47,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:47,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:47,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:47,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:47,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:47,535 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2020-10-13 04:47:47,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948334637] [2020-10-13 04:47:47,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:47,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:47:47,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643855483] [2020-10-13 04:47:47,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:47:47,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:47,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:47:47,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:47:47,537 INFO L87 Difference]: Start difference. First operand 154 states and 161 transitions. Second operand 12 states. [2020-10-13 04:47:47,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:47,682 INFO L93 Difference]: Finished difference Result 288 states and 302 transitions. [2020-10-13 04:47:47,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:47:47,682 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 149 [2020-10-13 04:47:47,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:47,684 INFO L225 Difference]: With dead ends: 288 [2020-10-13 04:47:47,684 INFO L226 Difference]: Without dead ends: 157 [2020-10-13 04:47:47,685 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 04:47:47,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-13 04:47:47,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2020-10-13 04:47:47,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-13 04:47:47,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 163 transitions. [2020-10-13 04:47:47,692 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 163 transitions. Word has length 149 [2020-10-13 04:47:47,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:47,692 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 163 transitions. [2020-10-13 04:47:47,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:47:47,692 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 163 transitions. [2020-10-13 04:47:47,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-13 04:47:47,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:47,693 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 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] [2020-10-13 04:47:47,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 04:47:47,694 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:47,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:47,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1261425652, now seen corresponding path program 17 times [2020-10-13 04:47:47,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:47,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527731957] [2020-10-13 04:47:47,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:47,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:47,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:47,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:47,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:47,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:48,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:52,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:52,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-13 04:47:52,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:47:52,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 04:47:52,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:52,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:47:52,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-13 04:47:52,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:47:52,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:52,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:52,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:52,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:52,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:52,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:52,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:52,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:47:52,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:52,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:52,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:52,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:52,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:52,849 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2020-10-13 04:47:52,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527731957] [2020-10-13 04:47:52,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:52,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:47:52,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890421752] [2020-10-13 04:47:52,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:47:52,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:52,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:47:52,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:47:52,851 INFO L87 Difference]: Start difference. First operand 156 states and 163 transitions. Second operand 13 states. [2020-10-13 04:47:53,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:53,265 INFO L93 Difference]: Finished difference Result 285 states and 303 transitions. [2020-10-13 04:47:53,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:47:53,266 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 151 [2020-10-13 04:47:53,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:53,268 INFO L225 Difference]: With dead ends: 285 [2020-10-13 04:47:53,268 INFO L226 Difference]: Without dead ends: 174 [2020-10-13 04:47:53,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:47:53,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-13 04:47:53,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 168. [2020-10-13 04:47:53,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-13 04:47:53,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 175 transitions. [2020-10-13 04:47:53,276 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 175 transitions. Word has length 151 [2020-10-13 04:47:53,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:53,276 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 175 transitions. [2020-10-13 04:47:53,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:47:53,276 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 175 transitions. [2020-10-13 04:47:53,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-13 04:47:53,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:53,278 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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] [2020-10-13 04:47:53,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 04:47:53,278 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:53,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:53,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1670601216, now seen corresponding path program 18 times [2020-10-13 04:47:53,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:53,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892523534] [2020-10-13 04:47:53,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:53,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:53,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:53,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:53,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:53,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:53,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:58,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:58,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-13 04:47:58,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:47:58,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5088 [2020-10-13 04:47:58,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:58,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:47:58,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:47:58,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:47:58,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:58,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:58,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:58,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:58,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:58,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:58,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:58,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:58,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:58,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:58,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:58,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:58,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:58,506 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2020-10-13 04:47:58,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892523534] [2020-10-13 04:47:58,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:58,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:47:58,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711183509] [2020-10-13 04:47:58,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:47:58,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:58,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:47:58,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:47:58,508 INFO L87 Difference]: Start difference. First operand 168 states and 175 transitions. Second operand 13 states. [2020-10-13 04:47:58,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:58,674 INFO L93 Difference]: Finished difference Result 314 states and 328 transitions. [2020-10-13 04:47:58,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:47:58,674 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 163 [2020-10-13 04:47:58,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:58,676 INFO L225 Difference]: With dead ends: 314 [2020-10-13 04:47:58,677 INFO L226 Difference]: Without dead ends: 171 [2020-10-13 04:47:58,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:47:58,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-13 04:47:58,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2020-10-13 04:47:58,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-13 04:47:58,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 177 transitions. [2020-10-13 04:47:58,696 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 177 transitions. Word has length 163 [2020-10-13 04:47:58,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:58,696 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 177 transitions. [2020-10-13 04:47:58,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:47:58,697 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 177 transitions. [2020-10-13 04:47:58,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-13 04:47:58,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:58,698 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 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] [2020-10-13 04:47:58,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 04:47:58,698 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:58,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:58,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1995126882, now seen corresponding path program 19 times [2020-10-13 04:47:58,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:58,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587254816] [2020-10-13 04:47:58,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:58,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:58,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:58,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:58,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:58,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:00,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:03,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:03,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-13 04:48:03,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:48:03,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5073 [2020-10-13 04:48:03,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:03,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:48:03,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 04:48:03,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:48:03,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:03,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:03,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:03,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:03,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:03,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:03,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:03,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:03,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:03,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:03,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:03,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:03,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:03,960 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2020-10-13 04:48:03,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587254816] [2020-10-13 04:48:03,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:03,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:48:03,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33909442] [2020-10-13 04:48:03,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:48:03,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:03,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:48:03,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:48:03,965 INFO L87 Difference]: Start difference. First operand 170 states and 177 transitions. Second operand 14 states. [2020-10-13 04:48:04,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:04,436 INFO L93 Difference]: Finished difference Result 309 states and 327 transitions. [2020-10-13 04:48:04,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:48:04,437 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 165 [2020-10-13 04:48:04,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:04,438 INFO L225 Difference]: With dead ends: 309 [2020-10-13 04:48:04,438 INFO L226 Difference]: Without dead ends: 188 [2020-10-13 04:48:04,439 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 04:48:04,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-13 04:48:04,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 182. [2020-10-13 04:48:04,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-13 04:48:04,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 189 transitions. [2020-10-13 04:48:04,447 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 189 transitions. Word has length 165 [2020-10-13 04:48:04,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:04,448 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 189 transitions. [2020-10-13 04:48:04,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:48:04,448 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 189 transitions. [2020-10-13 04:48:04,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-13 04:48:04,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:04,450 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 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] [2020-10-13 04:48:04,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 04:48:04,450 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:04,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:04,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1407236462, now seen corresponding path program 20 times [2020-10-13 04:48:04,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:04,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108319257] [2020-10-13 04:48:04,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:04,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:04,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:04,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:04,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:04,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:06,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:09,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:09,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-13 04:48:09,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:48:09,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5102 [2020-10-13 04:48:09,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:09,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:48:09,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:48:09,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:48:09,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:09,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:09,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:09,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:09,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:09,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:09,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:09,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:09,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:09,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:09,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:09,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:09,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:09,723 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2020-10-13 04:48:09,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108319257] [2020-10-13 04:48:09,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:09,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:48:09,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258221519] [2020-10-13 04:48:09,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:48:09,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:09,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:48:09,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:48:09,725 INFO L87 Difference]: Start difference. First operand 182 states and 189 transitions. Second operand 14 states. [2020-10-13 04:48:09,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:09,876 INFO L93 Difference]: Finished difference Result 340 states and 354 transitions. [2020-10-13 04:48:09,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:48:09,877 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 177 [2020-10-13 04:48:09,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:09,879 INFO L225 Difference]: With dead ends: 340 [2020-10-13 04:48:09,879 INFO L226 Difference]: Without dead ends: 185 [2020-10-13 04:48:09,880 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 04:48:09,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-13 04:48:09,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2020-10-13 04:48:09,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-13 04:48:09,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 191 transitions. [2020-10-13 04:48:09,887 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 191 transitions. Word has length 177 [2020-10-13 04:48:09,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:09,888 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 191 transitions. [2020-10-13 04:48:09,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:48:09,888 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 191 transitions. [2020-10-13 04:48:09,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-13 04:48:09,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:09,889 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 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] [2020-10-13 04:48:09,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 04:48:09,890 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:09,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:09,890 INFO L82 PathProgramCache]: Analyzing trace with hash 283458480, now seen corresponding path program 21 times [2020-10-13 04:48:09,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:09,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1431367485] [2020-10-13 04:48:09,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:09,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:09,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:09,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:09,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:10,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:11,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:14,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:14,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-13 04:48:14,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:48:14,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-13 04:48:14,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:14,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:48:14,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-13 04:48:14,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:48:14,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:15,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:15,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:15,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:15,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:15,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:15,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:15,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:15,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:15,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:15,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:15,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:15,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:15,117 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2020-10-13 04:48:15,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1431367485] [2020-10-13 04:48:15,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:15,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:48:15,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947971937] [2020-10-13 04:48:15,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:48:15,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:15,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:48:15,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:48:15,119 INFO L87 Difference]: Start difference. First operand 184 states and 191 transitions. Second operand 15 states. [2020-10-13 04:48:15,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:15,567 INFO L93 Difference]: Finished difference Result 333 states and 351 transitions. [2020-10-13 04:48:15,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:48:15,567 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 179 [2020-10-13 04:48:15,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:15,568 INFO L225 Difference]: With dead ends: 333 [2020-10-13 04:48:15,568 INFO L226 Difference]: Without dead ends: 202 [2020-10-13 04:48:15,569 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 04:48:15,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-13 04:48:15,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 196. [2020-10-13 04:48:15,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-13 04:48:15,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 203 transitions. [2020-10-13 04:48:15,577 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 203 transitions. Word has length 179 [2020-10-13 04:48:15,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:15,577 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 203 transitions. [2020-10-13 04:48:15,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:48:15,577 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 203 transitions. [2020-10-13 04:48:15,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-13 04:48:15,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:15,578 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 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] [2020-10-13 04:48:15,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 04:48:15,579 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:15,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:15,579 INFO L82 PathProgramCache]: Analyzing trace with hash 788594596, now seen corresponding path program 22 times [2020-10-13 04:48:15,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:15,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569194780] [2020-10-13 04:48:15,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:15,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:15,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:15,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:15,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:15,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:17,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:20,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:20,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-13 04:48:20,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:48:20,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5134 [2020-10-13 04:48:20,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:20,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:48:20,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:48:20,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:48:20,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:20,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:20,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:20,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:20,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:20,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:20,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:20,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:20,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:20,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:20,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:20,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:20,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:20,889 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 864 trivial. 0 not checked. [2020-10-13 04:48:20,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569194780] [2020-10-13 04:48:20,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:20,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:48:20,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895703300] [2020-10-13 04:48:20,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:48:20,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:20,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:48:20,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:48:20,891 INFO L87 Difference]: Start difference. First operand 196 states and 203 transitions. Second operand 15 states. [2020-10-13 04:48:21,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:21,064 INFO L93 Difference]: Finished difference Result 366 states and 380 transitions. [2020-10-13 04:48:21,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:48:21,064 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 191 [2020-10-13 04:48:21,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:21,066 INFO L225 Difference]: With dead ends: 366 [2020-10-13 04:48:21,067 INFO L226 Difference]: Without dead ends: 199 [2020-10-13 04:48:21,068 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 04:48:21,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-13 04:48:21,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2020-10-13 04:48:21,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-13 04:48:21,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 205 transitions. [2020-10-13 04:48:21,075 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 205 transitions. Word has length 191 [2020-10-13 04:48:21,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:21,076 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 205 transitions. [2020-10-13 04:48:21,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:48:21,076 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 205 transitions. [2020-10-13 04:48:21,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-13 04:48:21,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:21,077 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 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] [2020-10-13 04:48:21,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 04:48:21,078 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:21,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:21,078 INFO L82 PathProgramCache]: Analyzing trace with hash -613636030, now seen corresponding path program 23 times [2020-10-13 04:48:21,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:21,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270147895] [2020-10-13 04:48:21,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:21,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:21,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:21,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:21,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:21,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:25,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:26,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:26,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-13 04:48:26,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:48:26,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5398 [2020-10-13 04:48:26,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:26,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:48:26,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:48:26,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:48:26,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:26,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:26,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:26,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:26,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:26,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:26,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:26,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:26,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:26,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:26,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:26,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:26,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:26,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 864 trivial. 0 not checked. [2020-10-13 04:48:26,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270147895] [2020-10-13 04:48:26,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:26,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:48:26,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931442454] [2020-10-13 04:48:26,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:48:26,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:26,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:48:26,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:48:26,662 INFO L87 Difference]: Start difference. First operand 198 states and 205 transitions. Second operand 16 states. [2020-10-13 04:48:26,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:26,826 INFO L93 Difference]: Finished difference Result 368 states and 382 transitions. [2020-10-13 04:48:26,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:48:26,827 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 193 [2020-10-13 04:48:26,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:26,828 INFO L225 Difference]: With dead ends: 368 [2020-10-13 04:48:26,828 INFO L226 Difference]: Without dead ends: 201 [2020-10-13 04:48:26,829 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 04:48:26,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-13 04:48:26,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2020-10-13 04:48:26,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-13 04:48:26,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 207 transitions. [2020-10-13 04:48:26,843 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 207 transitions. Word has length 193 [2020-10-13 04:48:26,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:26,843 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 207 transitions. [2020-10-13 04:48:26,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:48:26,844 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 207 transitions. [2020-10-13 04:48:26,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-13 04:48:26,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:26,846 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 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] [2020-10-13 04:48:26,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 04:48:26,847 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:26,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:26,850 INFO L82 PathProgramCache]: Analyzing trace with hash 462463328, now seen corresponding path program 24 times [2020-10-13 04:48:26,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:26,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927025559] [2020-10-13 04:48:26,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:26,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:26,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:26,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:27,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:27,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:30,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:31,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:31,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-13 04:48:31,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:48:31,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5090 [2020-10-13 04:48:31,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:31,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:48:31,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-13 04:48:31,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:48:31,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:32,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:32,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:32,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:32,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:32,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:32,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:32,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:32,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:32,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:32,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:32,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:32,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:32,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1033 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 889 trivial. 0 not checked. [2020-10-13 04:48:32,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927025559] [2020-10-13 04:48:32,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:32,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:48:32,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239242114] [2020-10-13 04:48:32,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:48:32,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:32,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:48:32,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:48:32,172 INFO L87 Difference]: Start difference. First operand 200 states and 207 transitions. Second operand 16 states. [2020-10-13 04:48:32,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:32,640 INFO L93 Difference]: Finished difference Result 359 states and 377 transitions. [2020-10-13 04:48:32,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:48:32,641 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 195 [2020-10-13 04:48:32,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:32,643 INFO L225 Difference]: With dead ends: 359 [2020-10-13 04:48:32,643 INFO L226 Difference]: Without dead ends: 218 [2020-10-13 04:48:32,645 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 04:48:32,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-13 04:48:32,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 212. [2020-10-13 04:48:32,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-13 04:48:32,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 219 transitions. [2020-10-13 04:48:32,654 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 219 transitions. Word has length 195 [2020-10-13 04:48:32,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:32,655 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 219 transitions. [2020-10-13 04:48:32,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:48:32,655 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 219 transitions. [2020-10-13 04:48:32,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-13 04:48:32,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:32,658 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 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] [2020-10-13 04:48:32,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 04:48:32,658 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:32,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:32,659 INFO L82 PathProgramCache]: Analyzing trace with hash 299773268, now seen corresponding path program 25 times [2020-10-13 04:48:32,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:32,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497545017] [2020-10-13 04:48:32,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:32,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:32,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:32,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:32,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:32,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:35,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:37,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:37,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 215 [2020-10-13 04:48:37,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:48:37,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5214 [2020-10-13 04:48:37,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:37,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:48:37,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 04:48:37,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:48:37,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:38,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:38,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:38,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:38,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:38,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:38,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:38,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:38,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:38,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:38,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:38,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:38,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:38,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1183 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1014 trivial. 0 not checked. [2020-10-13 04:48:38,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497545017] [2020-10-13 04:48:38,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:38,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:48:38,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882491906] [2020-10-13 04:48:38,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:48:38,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:38,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:48:38,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:48:38,100 INFO L87 Difference]: Start difference. First operand 212 states and 219 transitions. Second operand 17 states. [2020-10-13 04:48:38,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:38,608 INFO L93 Difference]: Finished difference Result 381 states and 399 transitions. [2020-10-13 04:48:38,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:48:38,609 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 207 [2020-10-13 04:48:38,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:38,611 INFO L225 Difference]: With dead ends: 381 [2020-10-13 04:48:38,612 INFO L226 Difference]: Without dead ends: 230 [2020-10-13 04:48:38,613 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 04:48:38,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-13 04:48:38,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 224. [2020-10-13 04:48:38,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-13 04:48:38,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 231 transitions. [2020-10-13 04:48:38,621 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 231 transitions. Word has length 207 [2020-10-13 04:48:38,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:38,621 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 231 transitions. [2020-10-13 04:48:38,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:48:38,621 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 231 transitions. [2020-10-13 04:48:38,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-10-13 04:48:38,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:38,623 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 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] [2020-10-13 04:48:38,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 04:48:38,623 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:38,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:38,624 INFO L82 PathProgramCache]: Analyzing trace with hash 776354632, now seen corresponding path program 26 times [2020-10-13 04:48:38,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:38,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1300411213] [2020-10-13 04:48:38,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:38,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:38,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:38,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:38,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:38,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:42,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:43,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:43,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 227 [2020-10-13 04:48:43,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:48:43,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5147 [2020-10-13 04:48:43,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:43,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:48:43,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:48:43,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:48:43,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:43,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:43,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:43,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:43,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:43,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:43,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:43,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:43,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:43,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:43,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:43,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:43,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:43,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1345 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2020-10-13 04:48:43,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1300411213] [2020-10-13 04:48:43,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:43,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:48:43,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869001894] [2020-10-13 04:48:43,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:48:43,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:43,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:48:43,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:48:43,994 INFO L87 Difference]: Start difference. First operand 224 states and 231 transitions. Second operand 17 states. [2020-10-13 04:48:44,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:44,156 INFO L93 Difference]: Finished difference Result 418 states and 432 transitions. [2020-10-13 04:48:44,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:48:44,157 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 219 [2020-10-13 04:48:44,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:44,158 INFO L225 Difference]: With dead ends: 418 [2020-10-13 04:48:44,158 INFO L226 Difference]: Without dead ends: 227 [2020-10-13 04:48:44,159 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 04:48:44,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-13 04:48:44,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2020-10-13 04:48:44,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-13 04:48:44,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 233 transitions. [2020-10-13 04:48:44,169 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 233 transitions. Word has length 219 [2020-10-13 04:48:44,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:44,169 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 233 transitions. [2020-10-13 04:48:44,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:48:44,169 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 233 transitions. [2020-10-13 04:48:44,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-13 04:48:44,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:44,171 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 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] [2020-10-13 04:48:44,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 04:48:44,171 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:44,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:44,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1232399078, now seen corresponding path program 27 times [2020-10-13 04:48:44,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:44,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7570497] [2020-10-13 04:48:44,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:44,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:44,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:44,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:44,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:44,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:49,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:49,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-10-13 04:48:49,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:48:49,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5183 [2020-10-13 04:48:49,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:49,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:48:49,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 101 [2020-10-13 04:48:49,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:48:49,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:49,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:49,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:49,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:49,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:49,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:49,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:49,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:49,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:49,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:49,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:49,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:49,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:49,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1372 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2020-10-13 04:48:49,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7570497] [2020-10-13 04:48:49,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:49,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:48:49,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197563945] [2020-10-13 04:48:49,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:48:49,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:49,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:48:49,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:48:49,613 INFO L87 Difference]: Start difference. First operand 226 states and 233 transitions. Second operand 18 states. [2020-10-13 04:48:50,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:50,185 INFO L93 Difference]: Finished difference Result 405 states and 423 transitions. [2020-10-13 04:48:50,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:48:50,186 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 221 [2020-10-13 04:48:50,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:50,188 INFO L225 Difference]: With dead ends: 405 [2020-10-13 04:48:50,188 INFO L226 Difference]: Without dead ends: 244 [2020-10-13 04:48:50,189 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 04:48:50,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-13 04:48:50,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 238. [2020-10-13 04:48:50,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-13 04:48:50,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 245 transitions. [2020-10-13 04:48:50,198 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 245 transitions. Word has length 221 [2020-10-13 04:48:50,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:50,198 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 245 transitions. [2020-10-13 04:48:50,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:48:50,198 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 245 transitions. [2020-10-13 04:48:50,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-10-13 04:48:50,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:50,200 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 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] [2020-10-13 04:48:50,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 04:48:50,200 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:50,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:50,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1874329050, now seen corresponding path program 28 times [2020-10-13 04:48:50,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:50,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325372392] [2020-10-13 04:48:50,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:50,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:50,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:50,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:50,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:50,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:55,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:55,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 241 [2020-10-13 04:48:55,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:48:55,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5203 [2020-10-13 04:48:55,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:55,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:48:55,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:48:55,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:48:55,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:55,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:55,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:55,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:55,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:55,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:55,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:55,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:48:55,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:55,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:55,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:55,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:55,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:48:55,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1546 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1350 trivial. 0 not checked. [2020-10-13 04:48:55,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325372392] [2020-10-13 04:48:55,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:55,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:48:55,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468878629] [2020-10-13 04:48:55,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:48:55,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:55,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:48:55,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:48:55,773 INFO L87 Difference]: Start difference. First operand 238 states and 245 transitions. Second operand 18 states. [2020-10-13 04:48:56,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:56,028 INFO L93 Difference]: Finished difference Result 444 states and 458 transitions. [2020-10-13 04:48:56,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:48:56,029 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 233 [2020-10-13 04:48:56,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:56,031 INFO L225 Difference]: With dead ends: 444 [2020-10-13 04:48:56,032 INFO L226 Difference]: Without dead ends: 241 [2020-10-13 04:48:56,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:48:56,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-13 04:48:56,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 240. [2020-10-13 04:48:56,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-13 04:48:56,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 247 transitions. [2020-10-13 04:48:56,045 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 247 transitions. Word has length 233 [2020-10-13 04:48:56,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:56,045 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 247 transitions. [2020-10-13 04:48:56,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:48:56,045 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 247 transitions. [2020-10-13 04:48:56,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-10-13 04:48:56,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:56,048 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 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] [2020-10-13 04:48:56,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 04:48:56,049 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:56,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:56,050 INFO L82 PathProgramCache]: Analyzing trace with hash -713817864, now seen corresponding path program 29 times [2020-10-13 04:48:56,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:56,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996823541] [2020-10-13 04:48:56,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:56,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:56,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:56,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:56,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:56,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:01,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:01,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 243 [2020-10-13 04:49:01,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:49:01,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:49:01,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:01,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:49:01,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 107 [2020-10-13 04:49:01,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:49:01,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:01,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:01,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:01,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:01,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:01,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:01,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:01,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:49:01,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:01,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:01,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:01,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:01,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 04:49:01,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1575 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1350 trivial. 0 not checked. [2020-10-13 04:49:01,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996823541] [2020-10-13 04:49:01,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:01,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:49:01,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276584689] [2020-10-13 04:49:01,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:49:01,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:01,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:49:01,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:49:01,422 INFO L87 Difference]: Start difference. First operand 240 states and 247 transitions. Second operand 19 states. [2020-10-13 04:49:01,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:01,913 INFO L93 Difference]: Finished difference Result 429 states and 447 transitions. [2020-10-13 04:49:01,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:49:01,913 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 235 [2020-10-13 04:49:01,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:01,915 INFO L225 Difference]: With dead ends: 429 [2020-10-13 04:49:01,915 INFO L226 Difference]: Without dead ends: 258 [2020-10-13 04:49:01,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:49:01,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-10-13 04:49:01,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 252. [2020-10-13 04:49:01,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-13 04:49:01,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 259 transitions. [2020-10-13 04:49:01,924 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 259 transitions. Word has length 235 [2020-10-13 04:49:01,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:01,925 INFO L479 AbstractCegarLoop]: Abstraction has 252 states and 259 transitions. [2020-10-13 04:49:01,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:49:01,925 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 259 transitions. [2020-10-13 04:49:01,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-10-13 04:49:01,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:01,927 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 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] [2020-10-13 04:49:01,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 04:49:01,927 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:01,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:01,927 INFO L82 PathProgramCache]: Analyzing trace with hash -764061460, now seen corresponding path program 30 times [2020-10-13 04:49:01,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:01,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716035541] [2020-10-13 04:49:01,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:01,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:01,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:02,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:02,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:02,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:07,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:07,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 255 [2020-10-13 04:49:07,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:49:07,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5199 [2020-10-13 04:49:07,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:07,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:49:07,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:49:07,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:49:07,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:07,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:07,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:07,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:07,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:07,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:07,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:07,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:07,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:07,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:07,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:07,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:07,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:07,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1761 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1536 trivial. 0 not checked. [2020-10-13 04:49:07,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716035541] [2020-10-13 04:49:07,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:07,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:49:07,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493204047] [2020-10-13 04:49:07,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:49:07,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:07,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:49:07,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:49:07,392 INFO L87 Difference]: Start difference. First operand 252 states and 259 transitions. Second operand 19 states. [2020-10-13 04:49:07,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:07,560 INFO L93 Difference]: Finished difference Result 470 states and 484 transitions. [2020-10-13 04:49:07,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:49:07,561 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 247 [2020-10-13 04:49:07,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:07,562 INFO L225 Difference]: With dead ends: 470 [2020-10-13 04:49:07,562 INFO L226 Difference]: Without dead ends: 255 [2020-10-13 04:49:07,563 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 04:49:07,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-13 04:49:07,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 254. [2020-10-13 04:49:07,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-13 04:49:07,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 261 transitions. [2020-10-13 04:49:07,576 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 261 transitions. Word has length 247 [2020-10-13 04:49:07,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:07,577 INFO L479 AbstractCegarLoop]: Abstraction has 254 states and 261 transitions. [2020-10-13 04:49:07,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:49:07,577 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 261 transitions. [2020-10-13 04:49:07,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-10-13 04:49:07,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:07,579 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 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] [2020-10-13 04:49:07,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 04:49:07,579 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:07,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:07,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1725526134, now seen corresponding path program 31 times [2020-10-13 04:49:07,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:07,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063168332] [2020-10-13 04:49:07,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:07,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:07,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:07,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:07,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:07,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:12,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:12,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 257 [2020-10-13 04:49:12,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:49:12,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5256 [2020-10-13 04:49:12,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:12,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:49:12,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 04:49:12,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:49:12,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:13,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:13,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:13,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:13,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:13,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:13,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:13,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:13,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:13,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:13,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:13,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:13,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:13,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1792 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1536 trivial. 0 not checked. [2020-10-13 04:49:13,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063168332] [2020-10-13 04:49:13,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:13,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:49:13,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763328493] [2020-10-13 04:49:13,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:49:13,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:13,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:49:13,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:49:13,148 INFO L87 Difference]: Start difference. First operand 254 states and 261 transitions. Second operand 20 states. [2020-10-13 04:49:13,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:13,791 INFO L93 Difference]: Finished difference Result 453 states and 471 transitions. [2020-10-13 04:49:13,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:49:13,792 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 249 [2020-10-13 04:49:13,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:13,794 INFO L225 Difference]: With dead ends: 453 [2020-10-13 04:49:13,794 INFO L226 Difference]: Without dead ends: 272 [2020-10-13 04:49:13,795 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 04:49:13,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-13 04:49:13,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 266. [2020-10-13 04:49:13,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-13 04:49:13,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 273 transitions. [2020-10-13 04:49:13,804 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 273 transitions. Word has length 249 [2020-10-13 04:49:13,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:13,804 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 273 transitions. [2020-10-13 04:49:13,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:49:13,804 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 273 transitions. [2020-10-13 04:49:13,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-10-13 04:49:13,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:13,806 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 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] [2020-10-13 04:49:13,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 04:49:13,807 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:13,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:13,807 INFO L82 PathProgramCache]: Analyzing trace with hash -551981954, now seen corresponding path program 32 times [2020-10-13 04:49:13,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:13,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757718354] [2020-10-13 04:49:13,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:13,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:13,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:13,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:13,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:14,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:19,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:19,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 269 [2020-10-13 04:49:19,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:49:19,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5485 [2020-10-13 04:49:19,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:19,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:49:19,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:49:19,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:49:19,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:19,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:19,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:19,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:19,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:19,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:19,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:19,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:19,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:19,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:19,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:19,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:19,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:19,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1990 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1734 trivial. 0 not checked. [2020-10-13 04:49:19,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757718354] [2020-10-13 04:49:19,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:19,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:49:19,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854797311] [2020-10-13 04:49:19,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:49:19,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:19,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:49:19,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:49:19,580 INFO L87 Difference]: Start difference. First operand 266 states and 273 transitions. Second operand 20 states. [2020-10-13 04:49:19,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:19,731 INFO L93 Difference]: Finished difference Result 496 states and 510 transitions. [2020-10-13 04:49:19,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:49:19,731 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 261 [2020-10-13 04:49:19,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:19,733 INFO L225 Difference]: With dead ends: 496 [2020-10-13 04:49:19,733 INFO L226 Difference]: Without dead ends: 269 [2020-10-13 04:49:19,736 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 04:49:19,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-13 04:49:19,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 268. [2020-10-13 04:49:19,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-13 04:49:19,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 275 transitions. [2020-10-13 04:49:19,744 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 275 transitions. Word has length 261 [2020-10-13 04:49:19,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:19,745 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 275 transitions. [2020-10-13 04:49:19,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:49:19,745 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 275 transitions. [2020-10-13 04:49:19,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-10-13 04:49:19,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:19,747 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 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] [2020-10-13 04:49:19,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 04:49:19,747 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:19,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:19,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1507833500, now seen corresponding path program 33 times [2020-10-13 04:49:19,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:19,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461108697] [2020-10-13 04:49:19,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:19,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:19,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:19,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:19,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:20,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:25,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:25,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 271 [2020-10-13 04:49:25,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:49:25,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5504 [2020-10-13 04:49:25,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:25,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:49:25,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-13 04:49:25,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 04:49:25,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:25,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:25,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:25,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:25,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:25,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:25,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:25,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:25,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:25,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:25,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:25,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:25,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:25,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2023 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1734 trivial. 0 not checked. [2020-10-13 04:49:25,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461108697] [2020-10-13 04:49:25,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:25,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:49:25,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211873431] [2020-10-13 04:49:25,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:49:25,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:25,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:49:25,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:49:25,563 INFO L87 Difference]: Start difference. First operand 268 states and 275 transitions. Second operand 21 states. [2020-10-13 04:49:26,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:26,393 INFO L93 Difference]: Finished difference Result 477 states and 495 transitions. [2020-10-13 04:49:26,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:49:26,394 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 263 [2020-10-13 04:49:26,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:26,396 INFO L225 Difference]: With dead ends: 477 [2020-10-13 04:49:26,396 INFO L226 Difference]: Without dead ends: 286 [2020-10-13 04:49:26,398 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 04:49:26,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-13 04:49:26,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 280. [2020-10-13 04:49:26,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-13 04:49:26,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 287 transitions. [2020-10-13 04:49:26,409 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 287 transitions. Word has length 263 [2020-10-13 04:49:26,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:26,410 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 287 transitions. [2020-10-13 04:49:26,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:49:26,410 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 287 transitions. [2020-10-13 04:49:26,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2020-10-13 04:49:26,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:26,414 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 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] [2020-10-13 04:49:26,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 04:49:26,415 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:26,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:26,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1950832784, now seen corresponding path program 34 times [2020-10-13 04:49:26,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:26,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170672804] [2020-10-13 04:49:26,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:26,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:26,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:26,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:26,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:26,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:26,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:31,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:31,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 283 [2020-10-13 04:49:31,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:49:31,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5225 [2020-10-13 04:49:31,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:31,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:49:31,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:49:31,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 04:49:31,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:31,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:31,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:31,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:31,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:31,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:31,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:31,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:31,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:31,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:31,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:31,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:31,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:31,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1944 trivial. 0 not checked. [2020-10-13 04:49:31,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170672804] [2020-10-13 04:49:31,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:31,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:49:31,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384442169] [2020-10-13 04:49:31,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:49:31,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:31,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:49:31,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:49:31,977 INFO L87 Difference]: Start difference. First operand 280 states and 287 transitions. Second operand 21 states. [2020-10-13 04:49:32,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:32,188 INFO L93 Difference]: Finished difference Result 522 states and 536 transitions. [2020-10-13 04:49:32,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:49:32,189 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 275 [2020-10-13 04:49:32,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:32,191 INFO L225 Difference]: With dead ends: 522 [2020-10-13 04:49:32,191 INFO L226 Difference]: Without dead ends: 283 [2020-10-13 04:49:32,192 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 04:49:32,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-13 04:49:32,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 282. [2020-10-13 04:49:32,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-13 04:49:32,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 289 transitions. [2020-10-13 04:49:32,205 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 289 transitions. Word has length 275 [2020-10-13 04:49:32,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:32,207 INFO L479 AbstractCegarLoop]: Abstraction has 282 states and 289 transitions. [2020-10-13 04:49:32,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:49:32,207 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 289 transitions. [2020-10-13 04:49:32,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-10-13 04:49:32,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:32,209 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 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] [2020-10-13 04:49:32,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 04:49:32,209 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:32,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:32,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1862625746, now seen corresponding path program 35 times [2020-10-13 04:49:32,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:32,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527530039] [2020-10-13 04:49:32,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:32,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:32,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:32,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:32,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:32,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:36,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:37,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:37,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 285 [2020-10-13 04:49:37,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:49:37,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5162 [2020-10-13 04:49:37,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:37,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:49:37,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:49:37,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:49:37,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:37,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:37,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:37,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:37,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:37,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:37,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:37,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:37,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:37,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:37,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:37,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:37,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:37,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2268 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1944 trivial. 0 not checked. [2020-10-13 04:49:37,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527530039] [2020-10-13 04:49:37,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:37,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:49:37,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100665632] [2020-10-13 04:49:37,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:49:37,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:37,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:49:37,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:49:37,770 INFO L87 Difference]: Start difference. First operand 282 states and 289 transitions. Second operand 22 states. [2020-10-13 04:49:37,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:37,985 INFO L93 Difference]: Finished difference Result 524 states and 538 transitions. [2020-10-13 04:49:37,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:49:37,986 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 277 [2020-10-13 04:49:37,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:37,988 INFO L225 Difference]: With dead ends: 524 [2020-10-13 04:49:37,988 INFO L226 Difference]: Without dead ends: 285 [2020-10-13 04:49:37,989 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 04:49:37,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-10-13 04:49:37,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 284. [2020-10-13 04:49:37,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-13 04:49:37,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 291 transitions. [2020-10-13 04:49:37,997 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 291 transitions. Word has length 277 [2020-10-13 04:49:37,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:37,997 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 291 transitions. [2020-10-13 04:49:37,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:49:37,997 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 291 transitions. [2020-10-13 04:49:37,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-10-13 04:49:37,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:37,999 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 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] [2020-10-13 04:49:37,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 04:49:38,000 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:38,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:38,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1305797708, now seen corresponding path program 36 times [2020-10-13 04:49:38,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:38,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687517015] [2020-10-13 04:49:38,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:38,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:38,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:38,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:38,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:38,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:38,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:43,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:43,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-13 04:49:43,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:49:43,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5290 [2020-10-13 04:49:43,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:43,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:49:43,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-13 04:49:43,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:49:43,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:43,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:43,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:43,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:43,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:43,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:43,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:43,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:43,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:43,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:43,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:43,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:43,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:43,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2305 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1981 trivial. 0 not checked. [2020-10-13 04:49:43,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687517015] [2020-10-13 04:49:43,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:43,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:49:43,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921978275] [2020-10-13 04:49:43,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:49:43,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:43,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:49:43,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:49:43,640 INFO L87 Difference]: Start difference. First operand 284 states and 291 transitions. Second operand 22 states. [2020-10-13 04:49:44,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:44,293 INFO L93 Difference]: Finished difference Result 503 states and 521 transitions. [2020-10-13 04:49:44,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:49:44,294 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 279 [2020-10-13 04:49:44,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:44,296 INFO L225 Difference]: With dead ends: 503 [2020-10-13 04:49:44,296 INFO L226 Difference]: Without dead ends: 302 [2020-10-13 04:49:44,297 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 04:49:44,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2020-10-13 04:49:44,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 296. [2020-10-13 04:49:44,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-10-13 04:49:44,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 303 transitions. [2020-10-13 04:49:44,307 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 303 transitions. Word has length 279 [2020-10-13 04:49:44,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:44,308 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 303 transitions. [2020-10-13 04:49:44,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:49:44,308 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 303 transitions. [2020-10-13 04:49:44,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2020-10-13 04:49:44,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:44,310 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 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] [2020-10-13 04:49:44,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 04:49:44,310 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:44,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:44,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1109766592, now seen corresponding path program 37 times [2020-10-13 04:49:44,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:44,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813472500] [2020-10-13 04:49:44,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:44,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:44,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:44,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:44,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:44,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:49,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:49,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 299 [2020-10-13 04:49:49,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:49:49,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5126 [2020-10-13 04:49:49,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:49,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:49:49,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 04:49:49,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 04:49:49,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:49,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:49,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:49,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:49,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:49,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:49,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:49,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:49,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:49,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:49,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:49,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:49,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:49,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2527 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 2166 trivial. 0 not checked. [2020-10-13 04:49:49,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813472500] [2020-10-13 04:49:49,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:49,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:49:49,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812130597] [2020-10-13 04:49:49,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:49:49,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:49,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:49:49,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:49:49,853 INFO L87 Difference]: Start difference. First operand 296 states and 303 transitions. Second operand 23 states. [2020-10-13 04:49:50,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:50,543 INFO L93 Difference]: Finished difference Result 525 states and 543 transitions. [2020-10-13 04:49:50,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:49:50,544 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 291 [2020-10-13 04:49:50,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:50,546 INFO L225 Difference]: With dead ends: 525 [2020-10-13 04:49:50,546 INFO L226 Difference]: Without dead ends: 314 [2020-10-13 04:49:50,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:49:50,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-13 04:49:50,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 308. [2020-10-13 04:49:50,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-10-13 04:49:50,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 315 transitions. [2020-10-13 04:49:50,554 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 315 transitions. Word has length 291 [2020-10-13 04:49:50,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:50,554 INFO L479 AbstractCegarLoop]: Abstraction has 308 states and 315 transitions. [2020-10-13 04:49:50,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:49:50,554 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 315 transitions. [2020-10-13 04:49:50,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-10-13 04:49:50,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:50,556 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 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] [2020-10-13 04:49:50,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 04:49:50,557 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:50,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:50,557 INFO L82 PathProgramCache]: Analyzing trace with hash -856344012, now seen corresponding path program 38 times [2020-10-13 04:49:50,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:50,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545253852] [2020-10-13 04:49:50,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:50,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:50,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:50,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:50,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:50,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:55,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:55,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 311 [2020-10-13 04:49:55,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:49:55,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5216 [2020-10-13 04:49:55,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:55,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:49:55,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:49:55,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 04:49:55,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:56,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:56,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:56,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:56,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:56,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:56,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:56,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:56,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:56,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:56,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:56,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:56,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:56,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2761 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 2400 trivial. 0 not checked. [2020-10-13 04:49:56,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545253852] [2020-10-13 04:49:56,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:56,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:49:56,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599819455] [2020-10-13 04:49:56,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:49:56,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:56,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:49:56,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:49:56,150 INFO L87 Difference]: Start difference. First operand 308 states and 315 transitions. Second operand 23 states. [2020-10-13 04:49:56,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:56,378 INFO L93 Difference]: Finished difference Result 574 states and 588 transitions. [2020-10-13 04:49:56,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:49:56,379 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 303 [2020-10-13 04:49:56,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:56,381 INFO L225 Difference]: With dead ends: 574 [2020-10-13 04:49:56,382 INFO L226 Difference]: Without dead ends: 311 [2020-10-13 04:49:56,383 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 04:49:56,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-10-13 04:49:56,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 310. [2020-10-13 04:49:56,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-10-13 04:49:56,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 317 transitions. [2020-10-13 04:49:56,391 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 317 transitions. Word has length 303 [2020-10-13 04:49:56,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:56,391 INFO L479 AbstractCegarLoop]: Abstraction has 310 states and 317 transitions. [2020-10-13 04:49:56,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:49:56,391 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 317 transitions. [2020-10-13 04:49:56,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-10-13 04:49:56,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:56,394 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 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] [2020-10-13 04:49:56,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 04:49:56,395 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:56,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:56,395 INFO L82 PathProgramCache]: Analyzing trace with hash 938082002, now seen corresponding path program 39 times [2020-10-13 04:49:56,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:56,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437343334] [2020-10-13 04:49:56,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:56,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:56,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:56,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:56,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:56,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:01,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:01,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 313 [2020-10-13 04:50:01,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:50:01,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5400 [2020-10-13 04:50:01,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:01,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:50:01,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:01,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 04:50:01,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:02,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:02,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:02,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:02,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:02,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:02,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:02,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:50:02,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:02,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:02,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:02,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:02,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:02,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2800 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 2400 trivial. 0 not checked. [2020-10-13 04:50:02,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437343334] [2020-10-13 04:50:02,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:02,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:50:02,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165020480] [2020-10-13 04:50:02,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:50:02,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:02,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:50:02,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:50:02,237 INFO L87 Difference]: Start difference. First operand 310 states and 317 transitions. Second operand 24 states. [2020-10-13 04:50:02,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:02,413 INFO L93 Difference]: Finished difference Result 576 states and 590 transitions. [2020-10-13 04:50:02,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:50:02,413 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 305 [2020-10-13 04:50:02,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:02,415 INFO L225 Difference]: With dead ends: 576 [2020-10-13 04:50:02,415 INFO L226 Difference]: Without dead ends: 313 [2020-10-13 04:50:02,416 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 04:50:02,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-13 04:50:02,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 312. [2020-10-13 04:50:02,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-10-13 04:50:02,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 319 transitions. [2020-10-13 04:50:02,424 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 319 transitions. Word has length 305 [2020-10-13 04:50:02,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:02,424 INFO L479 AbstractCegarLoop]: Abstraction has 312 states and 319 transitions. [2020-10-13 04:50:02,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:50:02,425 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 319 transitions. [2020-10-13 04:50:02,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-10-13 04:50:02,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:02,427 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 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] [2020-10-13 04:50:02,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 04:50:02,427 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:02,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:02,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1195371536, now seen corresponding path program 40 times [2020-10-13 04:50:02,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:02,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130591823] [2020-10-13 04:50:02,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:02,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:02,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:02,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:02,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:02,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking...