/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_find_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:50:07,886 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:50:07,889 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:50:07,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:50:07,931 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:50:07,938 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:50:07,940 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:50:07,944 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:50:07,946 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:50:07,949 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:50:07,950 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:50:07,951 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:50:07,951 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:50:07,954 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:50:07,956 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:50:07,958 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:50:07,959 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:50:07,961 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:50:07,963 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:50:07,971 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:50:07,973 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:50:07,974 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:50:07,975 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:50:07,976 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:50:07,988 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:50:07,988 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:50:07,988 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:50:07,998 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:50:07,998 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:50:07,999 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:50:07,999 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:50:08,000 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:50:08,001 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:50:08,003 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:50:08,004 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:50:08,004 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:50:08,005 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:50:08,005 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:50:08,005 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:50:08,006 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:50:08,007 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:50:08,008 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 04:50:08,044 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:50:08,045 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:50:08,047 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:50:08,047 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:50:08,047 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:50:08,047 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:50:08,047 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:50:08,048 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:50:08,048 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:50:08,048 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:50:08,049 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:50:08,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:50:08,049 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:50:08,050 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:50:08,050 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:50:08,050 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:50:08,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:50:08,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:50:08,051 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:50:08,051 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:50:08,051 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:50:08,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:50:08,051 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:50:08,051 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:50:08,052 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:50:08,052 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:50:08,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:50:08,052 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:50:08,052 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:50:08,053 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 04:50:08,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:50:08,355 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:50:08,358 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:50:08,361 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:50:08,361 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:50:08,362 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_find_ground-1.i [2020-10-13 04:50:08,430 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c9fcaa163/af8492b2d79c483c9352a8bfd0a28729/FLAG733eb3780 [2020-10-13 04:50:08,823 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:50:08,823 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_find_ground-1.i [2020-10-13 04:50:08,830 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c9fcaa163/af8492b2d79c483c9352a8bfd0a28729/FLAG733eb3780 [2020-10-13 04:50:09,206 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c9fcaa163/af8492b2d79c483c9352a8bfd0a28729 [2020-10-13 04:50:09,214 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:50:09,216 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:50:09,218 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:50:09,218 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:50:09,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:50:09,222 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:50:09" (1/1) ... [2020-10-13 04:50:09,226 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42a4d81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:09, skipping insertion in model container [2020-10-13 04:50:09,226 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:50:09" (1/1) ... [2020-10-13 04:50:09,235 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:50:09,254 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:50:09,454 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:50:09,461 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:50:09,486 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:50:09,509 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:50:09,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:09 WrapperNode [2020-10-13 04:50:09,511 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:50:09,512 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:50:09,512 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:50:09,513 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:50:09,622 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:09" (1/1) ... [2020-10-13 04:50:09,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:09" (1/1) ... [2020-10-13 04:50:09,632 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:09" (1/1) ... [2020-10-13 04:50:09,632 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:09" (1/1) ... [2020-10-13 04:50:09,652 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:09" (1/1) ... [2020-10-13 04:50:09,659 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:09" (1/1) ... [2020-10-13 04:50:09,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:09" (1/1) ... [2020-10-13 04:50:09,665 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:50:09,665 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:50:09,665 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:50:09,665 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:50:09,666 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:09" (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 04:50:09,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:50:09,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:50:09,722 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 04:50:09,723 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:50:09,723 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:50:09,723 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 04:50:09,723 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:50:09,723 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:50:09,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 04:50:09,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:50:09,724 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:50:09,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:50:09,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:50:09,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:50:09,963 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:50:09,963 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 04:50:09,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:50:09 BoogieIcfgContainer [2020-10-13 04:50:09,968 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:50:09,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:50:09,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:50:09,974 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:50:09,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:50:09" (1/3) ... [2020-10-13 04:50:09,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fcd3182 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:50:09, skipping insertion in model container [2020-10-13 04:50:09,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:09" (2/3) ... [2020-10-13 04:50:09,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fcd3182 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:50:09, skipping insertion in model container [2020-10-13 04:50:09,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:50:09" (3/3) ... [2020-10-13 04:50:09,979 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_find_ground-1.i [2020-10-13 04:50:09,993 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:50:10,004 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:50:10,019 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:50:10,051 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:50:10,051 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:50:10,051 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:50:10,051 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:50:10,052 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:50:10,052 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:50:10,052 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:50:10,052 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:50:10,074 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-13 04:50:10,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 04:50:10,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:10,082 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:10,083 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:10,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:10,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1063635089, now seen corresponding path program 1 times [2020-10-13 04:50:10,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:10,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313942602] [2020-10-13 04:50:10,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:10,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:10,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:10,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:10,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:10,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:10,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 04:50:10,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:50:10,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 282 [2020-10-13 04:50:10,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:10,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:10,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:50:10,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:10,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 04:50:10,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:10,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:10,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:10,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:10,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:10,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:10,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 04:50:10,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:10,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:10,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:10,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:10,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:50:10,624 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 04:50:10,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313942602] [2020-10-13 04:50:10,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:50:10,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 04:50:10,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870293554] [2020-10-13 04:50:10,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 04:50:10,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:10,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 04:50:10,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:50:10,648 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2020-10-13 04:50:10,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:10,748 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2020-10-13 04:50:10,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 04:50:10,750 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-10-13 04:50:10,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:10,759 INFO L225 Difference]: With dead ends: 46 [2020-10-13 04:50:10,760 INFO L226 Difference]: Without dead ends: 22 [2020-10-13 04:50:10,764 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 04:50:10,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-13 04:50:10,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-13 04:50:10,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 04:50:10,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-13 04:50:10,801 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2020-10-13 04:50:10,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:10,802 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-13 04:50:10,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 04:50:10,802 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-13 04:50:10,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 04:50:10,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:10,803 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:10,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:50:10,804 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:10,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:10,805 INFO L82 PathProgramCache]: Analyzing trace with hash -977598642, now seen corresponding path program 1 times [2020-10-13 04:50:10,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:10,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463960971] [2020-10-13 04:50:10,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:10,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:10,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:10,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:11,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:11,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 04:50:11,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:50:11,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-10-13 04:50:11,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:11,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:50:11,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:11,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:50:11,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:11,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:11,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:11,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:11,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:11,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:11,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:11,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:50:11,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:11,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:11,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:11,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:11,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:50:11,092 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 04:50:11,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463960971] [2020-10-13 04:50:11,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:50:11,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:50:11,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761154876] [2020-10-13 04:50:11,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:50:11,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:11,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:50:11,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:50:11,097 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 4 states. [2020-10-13 04:50:11,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:11,162 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2020-10-13 04:50:11,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:50:11,163 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-13 04:50:11,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:11,164 INFO L225 Difference]: With dead ends: 38 [2020-10-13 04:50:11,165 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 04:50:11,166 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 04:50:11,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 04:50:11,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-13 04:50:11,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 04:50:11,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-13 04:50:11,174 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2020-10-13 04:50:11,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:11,174 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-13 04:50:11,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:50:11,175 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-13 04:50:11,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 04:50:11,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:11,176 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:11,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:50:11,176 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:11,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:11,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1311771152, now seen corresponding path program 1 times [2020-10-13 04:50:11,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:11,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152607171] [2020-10-13 04:50:11,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:11,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:11,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:11,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:11,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:11,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 04:50:11,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:50:11,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-13 04:50:11,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:11,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:50:11,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:11,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:50:11,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:11,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:11,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:11,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:11,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:11,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:11,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:11,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:50:11,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:11,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:11,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:11,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:11,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:11,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:50:11,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152607171] [2020-10-13 04:50:11,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:11,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:50:11,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431924049] [2020-10-13 04:50:11,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:50:11,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:11,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:50:11,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:50:11,398 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 5 states. [2020-10-13 04:50:11,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:11,460 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-10-13 04:50:11,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:50:11,461 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-13 04:50:11,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:11,462 INFO L225 Difference]: With dead ends: 40 [2020-10-13 04:50:11,462 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 04:50:11,463 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 04:50:11,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 04:50:11,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-13 04:50:11,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 04:50:11,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-13 04:50:11,469 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 18 [2020-10-13 04:50:11,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:11,470 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-13 04:50:11,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:50:11,470 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-13 04:50:11,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 04:50:11,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:11,471 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:11,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:50:11,471 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:11,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:11,472 INFO L82 PathProgramCache]: Analyzing trace with hash -329006062, now seen corresponding path program 2 times [2020-10-13 04:50:11,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:11,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882481738] [2020-10-13 04:50:11,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:11,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:11,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:11,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:11,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:11,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 04:50:11,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:50:11,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-13 04:50:11,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:11,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:50:11,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:11,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:50:11,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:11,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:11,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:11,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:11,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:11,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:11,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:11,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:50:11,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:11,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:11,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:11,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:11,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:11,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:50:11,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882481738] [2020-10-13 04:50:11,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:11,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:50:11,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484554517] [2020-10-13 04:50:11,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:50:11,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:11,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:50:11,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:50:11,717 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2020-10-13 04:50:11,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:11,795 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2020-10-13 04:50:11,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:50:11,796 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-13 04:50:11,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:11,797 INFO L225 Difference]: With dead ends: 42 [2020-10-13 04:50:11,797 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 04:50:11,798 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 04:50:11,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 04:50:11,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-13 04:50:11,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 04:50:11,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-13 04:50:11,803 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 20 [2020-10-13 04:50:11,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:11,804 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-13 04:50:11,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:50:11,804 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-13 04:50:11,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 04:50:11,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:11,805 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:11,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:50:11,806 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:11,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:11,806 INFO L82 PathProgramCache]: Analyzing trace with hash -784559692, now seen corresponding path program 3 times [2020-10-13 04:50:11,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:11,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282370046] [2020-10-13 04:50:11,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:11,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:11,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:11,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:12,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:12,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 04:50:12,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:50:12,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-10-13 04:50:12,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:12,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:50:12,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:12,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:50:12,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:50:12,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:12,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:12,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:12,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:12,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:12,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:12,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:50:12,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:12,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:12,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:12,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:12,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:50:12,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:50:12,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282370046] [2020-10-13 04:50:12,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:12,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:50:12,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454533681] [2020-10-13 04:50:12,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:50:12,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:12,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:50:12,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:50:12,133 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 7 states. [2020-10-13 04:50:12,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:12,244 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-10-13 04:50:12,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:50:12,245 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-13 04:50:12,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:12,246 INFO L225 Difference]: With dead ends: 44 [2020-10-13 04:50:12,246 INFO L226 Difference]: Without dead ends: 30 [2020-10-13 04:50:12,247 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 04:50:12,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-13 04:50:12,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-13 04:50:12,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 04:50:12,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-13 04:50:12,253 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 22 [2020-10-13 04:50:12,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:12,253 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-13 04:50:12,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:50:12,254 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-13 04:50:12,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 04:50:12,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:12,255 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:12,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:50:12,255 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:12,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:12,256 INFO L82 PathProgramCache]: Analyzing trace with hash -484933930, now seen corresponding path program 4 times [2020-10-13 04:50:12,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:12,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106901063] [2020-10-13 04:50:12,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:12,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:12,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:12,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:12,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:12,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 04:50:12,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:50:12,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 251 [2020-10-13 04:50:12,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:12,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:50:12,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:12,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:50:12,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:50:12,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:12,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:12,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:12,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:12,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:12,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:12,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:50:12,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:12,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:12,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:12,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:12,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:50:12,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:50:12,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106901063] [2020-10-13 04:50:12,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:12,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:50:12,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625919135] [2020-10-13 04:50:12,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:50:12,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:12,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:50:12,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:50:12,597 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 8 states. [2020-10-13 04:50:12,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:12,674 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2020-10-13 04:50:12,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:50:12,674 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-13 04:50:12,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:12,675 INFO L225 Difference]: With dead ends: 46 [2020-10-13 04:50:12,675 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 04:50:12,676 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 04:50:12,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 04:50:12,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-13 04:50:12,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 04:50:12,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-10-13 04:50:12,682 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 24 [2020-10-13 04:50:12,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:12,682 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-10-13 04:50:12,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:50:12,682 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-10-13 04:50:12,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 04:50:12,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:12,683 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:12,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:50:12,684 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:12,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:12,684 INFO L82 PathProgramCache]: Analyzing trace with hash -307385480, now seen corresponding path program 5 times [2020-10-13 04:50:12,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:12,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926528464] [2020-10-13 04:50:12,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:12,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:12,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:12,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:12,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 04:50:12,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:50:12,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 262 [2020-10-13 04:50:12,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:12,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:50:12,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:12,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:50:12,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:13,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:13,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:13,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:13,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:13,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:13,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:13,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:50:13,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:13,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:13,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:13,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:13,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:13,040 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:50:13,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926528464] [2020-10-13 04:50:13,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:13,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:50:13,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011202209] [2020-10-13 04:50:13,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:50:13,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:13,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:50:13,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:50:13,043 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 9 states. [2020-10-13 04:50:13,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:13,148 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-10-13 04:50:13,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:50:13,148 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-13 04:50:13,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:13,149 INFO L225 Difference]: With dead ends: 48 [2020-10-13 04:50:13,149 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 04:50:13,150 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 04:50:13,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 04:50:13,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-13 04:50:13,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 04:50:13,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-10-13 04:50:13,156 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 26 [2020-10-13 04:50:13,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:13,156 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-10-13 04:50:13,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:50:13,157 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-10-13 04:50:13,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 04:50:13,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:13,158 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:13,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:50:13,158 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:13,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:13,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1482016870, now seen corresponding path program 6 times [2020-10-13 04:50:13,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:13,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321006299] [2020-10-13 04:50:13,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:13,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:13,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:13,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:13,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:13,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 04:50:13,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:50:13,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 307 [2020-10-13 04:50:13,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:13,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:50:13,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:13,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:50:13,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:13,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:13,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:13,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:13,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:13,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:13,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:13,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-13 04:50:13,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:13,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:13,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:13,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:13,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:13,583 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:50:13,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321006299] [2020-10-13 04:50:13,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:13,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:50:13,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323413612] [2020-10-13 04:50:13,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:50:13,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:13,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:50:13,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:50:13,586 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 10 states. [2020-10-13 04:50:13,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:13,683 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2020-10-13 04:50:13,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:50:13,683 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-13 04:50:13,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:13,684 INFO L225 Difference]: With dead ends: 50 [2020-10-13 04:50:13,684 INFO L226 Difference]: Without dead ends: 36 [2020-10-13 04:50:13,685 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 04:50:13,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-13 04:50:13,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-13 04:50:13,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 04:50:13,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-10-13 04:50:13,690 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 28 [2020-10-13 04:50:13,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:13,691 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-10-13 04:50:13,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:50:13,691 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-10-13 04:50:13,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 04:50:13,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:13,692 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:13,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:50:13,693 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:13,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:13,693 INFO L82 PathProgramCache]: Analyzing trace with hash -726383812, now seen corresponding path program 7 times [2020-10-13 04:50:13,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:13,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976966374] [2020-10-13 04:50:13,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:13,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:13,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:13,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:14,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:14,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 04:50:14,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:50:14,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 409 [2020-10-13 04:50:14,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:14,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:50:14,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:14,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:50:14,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:14,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:14,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:14,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:14,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:14,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:14,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:14,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:50:14,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:14,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:14,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:14,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:14,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:14,213 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:50:14,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976966374] [2020-10-13 04:50:14,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:14,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:50:14,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793697058] [2020-10-13 04:50:14,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:50:14,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:14,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:50:14,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:50:14,216 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 11 states. [2020-10-13 04:50:14,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:14,322 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2020-10-13 04:50:14,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:50:14,323 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-13 04:50:14,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:14,324 INFO L225 Difference]: With dead ends: 52 [2020-10-13 04:50:14,324 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 04:50:14,325 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 04:50:14,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 04:50:14,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-13 04:50:14,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 04:50:14,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-10-13 04:50:14,330 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 30 [2020-10-13 04:50:14,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:14,330 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-10-13 04:50:14,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:50:14,331 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-10-13 04:50:14,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 04:50:14,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:14,332 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:14,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 04:50:14,332 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:14,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:14,333 INFO L82 PathProgramCache]: Analyzing trace with hash -412488098, now seen corresponding path program 8 times [2020-10-13 04:50:14,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:14,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22660003] [2020-10-13 04:50:14,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:14,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:14,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:14,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:14,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:14,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 04:50:14,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:50:14,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 466 [2020-10-13 04:50:14,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:14,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:50:14,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:14,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:50:14,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:14,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:14,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:14,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:14,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:14,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:14,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:14,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:50:14,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:14,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:14,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:14,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:14,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:14,932 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:50:14,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22660003] [2020-10-13 04:50:14,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:14,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:50:14,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994098091] [2020-10-13 04:50:14,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:50:14,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:14,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:50:14,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:50:14,935 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 12 states. [2020-10-13 04:50:15,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:15,025 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2020-10-13 04:50:15,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:50:15,025 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-13 04:50:15,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:15,026 INFO L225 Difference]: With dead ends: 54 [2020-10-13 04:50:15,027 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 04:50:15,027 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 04:50:15,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 04:50:15,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-13 04:50:15,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 04:50:15,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-10-13 04:50:15,032 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 32 [2020-10-13 04:50:15,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:15,032 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-10-13 04:50:15,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:50:15,033 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-10-13 04:50:15,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 04:50:15,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:15,034 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:15,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 04:50:15,034 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:15,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:15,035 INFO L82 PathProgramCache]: Analyzing trace with hash 593582336, now seen corresponding path program 9 times [2020-10-13 04:50:15,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:15,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321843162] [2020-10-13 04:50:15,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:15,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:15,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:15,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:15,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:15,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 04:50:15,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:50:15,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 509 [2020-10-13 04:50:15,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:15,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:50:15,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:15,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:50:15,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:15,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:15,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:15,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:15,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:15,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:15,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:15,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:50:15,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:15,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:15,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:15,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:15,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:15,686 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:50:15,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321843162] [2020-10-13 04:50:15,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:15,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:50:15,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762965311] [2020-10-13 04:50:15,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:50:15,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:15,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:50:15,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:50:15,689 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 13 states. [2020-10-13 04:50:15,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:15,789 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-10-13 04:50:15,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:50:15,790 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-13 04:50:15,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:15,791 INFO L225 Difference]: With dead ends: 56 [2020-10-13 04:50:15,791 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 04:50:15,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:50:15,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 04:50:15,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-13 04:50:15,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 04:50:15,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-10-13 04:50:15,796 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 34 [2020-10-13 04:50:15,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:15,797 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-10-13 04:50:15,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:50:15,797 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-10-13 04:50:15,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 04:50:15,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:15,798 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:15,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 04:50:15,799 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:15,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:15,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1059627810, now seen corresponding path program 10 times [2020-10-13 04:50:15,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:15,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264134423] [2020-10-13 04:50:15,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:15,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:15,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:15,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:16,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:16,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 04:50:16,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:50:16,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 806 [2020-10-13 04:50:16,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:16,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:50:16,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:16,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:50:16,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:50:16,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:16,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:16,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:16,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:16,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:16,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:16,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:50:16,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:16,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:16,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:16,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:16,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:50:16,815 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:50:16,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264134423] [2020-10-13 04:50:16,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:16,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:50:16,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338553923] [2020-10-13 04:50:16,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:50:16,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:16,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:50:16,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:50:16,819 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 14 states. [2020-10-13 04:50:16,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:16,960 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2020-10-13 04:50:16,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:50:16,961 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-13 04:50:16,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:16,962 INFO L225 Difference]: With dead ends: 58 [2020-10-13 04:50:16,962 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 04:50:16,963 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 04:50:16,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 04:50:16,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-13 04:50:16,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 04:50:16,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-10-13 04:50:16,968 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 36 [2020-10-13 04:50:16,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:16,968 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-10-13 04:50:16,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:50:16,969 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-10-13 04:50:16,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 04:50:16,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:16,969 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:16,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 04:50:16,970 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:16,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:16,970 INFO L82 PathProgramCache]: Analyzing trace with hash -2042237756, now seen corresponding path program 11 times [2020-10-13 04:50:16,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:16,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179999799] [2020-10-13 04:50:16,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:16,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:16,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:17,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:17,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:17,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 04:50:17,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:50:17,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 715 [2020-10-13 04:50:17,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:17,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:50:17,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:17,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:50:17,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:17,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:17,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:17,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:17,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:17,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:17,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:17,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:50:17,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:17,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:17,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:17,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:17,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:50:17,885 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:50:17,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179999799] [2020-10-13 04:50:17,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:17,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:50:17,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252019850] [2020-10-13 04:50:17,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:50:17,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:17,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:50:17,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:50:17,889 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 15 states. [2020-10-13 04:50:18,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:18,079 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-10-13 04:50:18,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:50:18,080 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-13 04:50:18,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:18,081 INFO L225 Difference]: With dead ends: 60 [2020-10-13 04:50:18,082 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 04:50:18,083 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 04:50:18,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 04:50:18,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-13 04:50:18,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 04:50:18,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-10-13 04:50:18,088 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 38 [2020-10-13 04:50:18,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:18,088 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-10-13 04:50:18,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:50:18,089 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-10-13 04:50:18,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 04:50:18,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:18,090 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:18,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 04:50:18,090 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:18,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:18,091 INFO L82 PathProgramCache]: Analyzing trace with hash 2067224038, now seen corresponding path program 12 times [2020-10-13 04:50:18,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:18,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313789250] [2020-10-13 04:50:18,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:18,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:18,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:18,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:19,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:19,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 04:50:19,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:50:19,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1157 [2020-10-13 04:50:19,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:19,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:50:19,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:19,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:50:19,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:50:19,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:19,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:19,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:19,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:19,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:19,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:19,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:50:19,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:19,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:19,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:19,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:19,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:50:19,516 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:50:19,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313789250] [2020-10-13 04:50:19,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:19,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:50:19,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851636642] [2020-10-13 04:50:19,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:50:19,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:19,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:50:19,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:50:19,520 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 16 states. [2020-10-13 04:50:19,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:19,707 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2020-10-13 04:50:19,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:50:19,708 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-13 04:50:19,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:19,709 INFO L225 Difference]: With dead ends: 62 [2020-10-13 04:50:19,709 INFO L226 Difference]: Without dead ends: 48 [2020-10-13 04:50:19,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:50:19,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-13 04:50:19,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-13 04:50:19,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 04:50:19,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2020-10-13 04:50:19,716 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 40 [2020-10-13 04:50:19,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:19,717 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2020-10-13 04:50:19,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:50:19,717 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-10-13 04:50:19,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 04:50:19,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:19,718 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:19,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 04:50:19,719 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:19,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:19,719 INFO L82 PathProgramCache]: Analyzing trace with hash -109904248, now seen corresponding path program 13 times [2020-10-13 04:50:19,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:19,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198776509] [2020-10-13 04:50:19,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:19,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:19,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:19,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:20,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:20,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 04:50:20,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:50:20,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 982 [2020-10-13 04:50:20,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:20,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:50:20,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:20,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:50:20,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:20,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:20,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:20,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:20,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:20,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:20,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:20,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:50:20,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:20,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:20,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:20,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:20,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:20,941 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:50:20,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198776509] [2020-10-13 04:50:20,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:20,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:50:20,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108725519] [2020-10-13 04:50:20,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:50:20,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:20,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:50:20,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:50:20,947 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 17 states. [2020-10-13 04:50:21,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:21,168 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2020-10-13 04:50:21,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:50:21,169 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-10-13 04:50:21,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:21,170 INFO L225 Difference]: With dead ends: 64 [2020-10-13 04:50:21,170 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 04:50:21,171 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 04:50:21,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 04:50:21,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-13 04:50:21,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 04:50:21,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-10-13 04:50:21,186 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 42 [2020-10-13 04:50:21,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:21,189 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-10-13 04:50:21,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:50:21,190 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-10-13 04:50:21,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 04:50:21,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:21,193 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:21,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 04:50:21,194 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:21,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:21,194 INFO L82 PathProgramCache]: Analyzing trace with hash -681113942, now seen corresponding path program 14 times [2020-10-13 04:50:21,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:21,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743579274] [2020-10-13 04:50:21,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:21,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:21,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:21,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:22,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:22,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 04:50:22,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:50:22,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1255 [2020-10-13 04:50:22,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:22,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:50:22,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:22,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:50:22,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:22,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:22,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:22,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:22,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:22,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:22,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:22,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:50:22,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:22,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:22,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:22,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:22,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:22,708 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:50:22,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743579274] [2020-10-13 04:50:22,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:22,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:50:22,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300009344] [2020-10-13 04:50:22,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:50:22,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:22,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:50:22,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:50:22,713 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 18 states. [2020-10-13 04:50:22,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:22,844 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2020-10-13 04:50:22,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:50:22,845 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-10-13 04:50:22,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:22,845 INFO L225 Difference]: With dead ends: 66 [2020-10-13 04:50:22,845 INFO L226 Difference]: Without dead ends: 52 [2020-10-13 04:50:22,846 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 04:50:22,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-13 04:50:22,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-13 04:50:22,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 04:50:22,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-10-13 04:50:22,851 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 44 [2020-10-13 04:50:22,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:22,851 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-10-13 04:50:22,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:50:22,851 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-10-13 04:50:22,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 04:50:22,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:22,852 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:22,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 04:50:22,852 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:22,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:22,853 INFO L82 PathProgramCache]: Analyzing trace with hash 142184012, now seen corresponding path program 15 times [2020-10-13 04:50:22,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:22,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034107760] [2020-10-13 04:50:22,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:22,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:22,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:22,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:24,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:24,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 04:50:24,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:50:24,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1338 [2020-10-13 04:50:24,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:24,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:50:24,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:24,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:50:24,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:24,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:24,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:24,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:24,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:24,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:24,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:24,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:50:24,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:24,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:24,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:24,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:24,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:24,442 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:50:24,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034107760] [2020-10-13 04:50:24,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:24,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:50:24,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007444215] [2020-10-13 04:50:24,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:50:24,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:24,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:50:24,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:50:24,445 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 19 states. [2020-10-13 04:50:24,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:24,557 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2020-10-13 04:50:24,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:50:24,557 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2020-10-13 04:50:24,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:24,558 INFO L225 Difference]: With dead ends: 68 [2020-10-13 04:50:24,558 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 04:50:24,559 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 04:50:24,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 04:50:24,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-13 04:50:24,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 04:50:24,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-10-13 04:50:24,563 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 46 [2020-10-13 04:50:24,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:24,563 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-10-13 04:50:24,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:50:24,564 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-10-13 04:50:24,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 04:50:24,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:24,564 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:24,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 04:50:24,565 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:24,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:24,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1057535342, now seen corresponding path program 16 times [2020-10-13 04:50:24,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:24,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473078184] [2020-10-13 04:50:24,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:24,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:24,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:24,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:25,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:25,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 04:50:25,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:50:25,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1402 [2020-10-13 04:50:25,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:25,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:50:25,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:25,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:50:25,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:50:26,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:26,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:26,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:26,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:26,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:26,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:26,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:50:26,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:26,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:26,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:26,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:26,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:50:26,260 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:50:26,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473078184] [2020-10-13 04:50:26,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:26,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:50:26,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379974806] [2020-10-13 04:50:26,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:50:26,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:26,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:50:26,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:50:26,269 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 20 states. [2020-10-13 04:50:26,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:26,423 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2020-10-13 04:50:26,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:50:26,424 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-10-13 04:50:26,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:26,425 INFO L225 Difference]: With dead ends: 70 [2020-10-13 04:50:26,425 INFO L226 Difference]: Without dead ends: 56 [2020-10-13 04:50:26,426 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 04:50:26,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-13 04:50:26,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-13 04:50:26,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 04:50:26,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-10-13 04:50:26,430 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 48 [2020-10-13 04:50:26,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:26,430 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-10-13 04:50:26,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:50:26,431 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-10-13 04:50:26,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 04:50:26,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:26,431 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:26,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 04:50:26,432 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:26,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:26,432 INFO L82 PathProgramCache]: Analyzing trace with hash 241867792, now seen corresponding path program 17 times [2020-10-13 04:50:26,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:26,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090900970] [2020-10-13 04:50:26,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:26,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:26,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:26,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:27,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:27,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 04:50:27,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:50:27,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1346 [2020-10-13 04:50:27,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:27,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:50:27,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:27,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 04:50:27,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:28,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:28,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:28,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:28,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:28,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:28,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:28,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:50:28,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:28,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:28,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:28,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:28,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:28,056 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:50:28,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090900970] [2020-10-13 04:50:28,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:28,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:50:28,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45403418] [2020-10-13 04:50:28,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:50:28,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:28,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:50:28,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:50:28,060 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 21 states. [2020-10-13 04:50:28,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:28,233 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2020-10-13 04:50:28,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:50:28,234 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-10-13 04:50:28,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:28,235 INFO L225 Difference]: With dead ends: 72 [2020-10-13 04:50:28,235 INFO L226 Difference]: Without dead ends: 58 [2020-10-13 04:50:28,236 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 04:50:28,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-13 04:50:28,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-13 04:50:28,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 04:50:28,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-10-13 04:50:28,240 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 50 [2020-10-13 04:50:28,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:28,241 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-10-13 04:50:28,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:50:28,241 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-10-13 04:50:28,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 04:50:28,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:28,242 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:28,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 04:50:28,242 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:28,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:28,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1930599886, now seen corresponding path program 18 times [2020-10-13 04:50:28,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:28,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388464378] [2020-10-13 04:50:28,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:28,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:28,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:28,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:29,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:29,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 04:50:29,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:50:29,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1288 [2020-10-13 04:50:29,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:29,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:50:29,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:29,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:50:29,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:29,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:29,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:29,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:29,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:29,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:29,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:29,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 04:50:29,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:29,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:29,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:29,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:29,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:50:29,968 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:50:29,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388464378] [2020-10-13 04:50:29,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:29,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:50:29,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674128205] [2020-10-13 04:50:29,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:50:29,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:29,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:50:29,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:50:29,972 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 22 states. [2020-10-13 04:50:30,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:30,126 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2020-10-13 04:50:30,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:50:30,127 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-13 04:50:30,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:30,128 INFO L225 Difference]: With dead ends: 74 [2020-10-13 04:50:30,128 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 04:50:30,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:50:30,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 04:50:30,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-13 04:50:30,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 04:50:30,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-10-13 04:50:30,142 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 52 [2020-10-13 04:50:30,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:30,142 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-10-13 04:50:30,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:50:30,143 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-10-13 04:50:30,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 04:50:30,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:30,145 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:30,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 04:50:30,145 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:30,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:30,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1977034708, now seen corresponding path program 19 times [2020-10-13 04:50:30,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:30,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920951462] [2020-10-13 04:50:30,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:30,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:30,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:30,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:31,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:31,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 04:50:31,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:50:31,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1329 [2020-10-13 04:50:31,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:31,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:50:31,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:31,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 04:50:31,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:31,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:31,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:31,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:31,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:31,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:31,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:31,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:50:31,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:31,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:31,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:31,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:31,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:50:31,853 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:50:31,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920951462] [2020-10-13 04:50:31,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:31,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:50:31,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908111088] [2020-10-13 04:50:31,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:50:31,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:31,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:50:31,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:50:31,858 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 23 states. [2020-10-13 04:50:32,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:32,043 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2020-10-13 04:50:32,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:50:32,044 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-10-13 04:50:32,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:32,045 INFO L225 Difference]: With dead ends: 76 [2020-10-13 04:50:32,045 INFO L226 Difference]: Without dead ends: 62 [2020-10-13 04:50:32,046 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 04:50:32,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-13 04:50:32,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-13 04:50:32,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 04:50:32,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-10-13 04:50:32,051 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 54 [2020-10-13 04:50:32,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:32,052 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-10-13 04:50:32,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:50:32,052 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-10-13 04:50:32,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 04:50:32,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:32,052 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:32,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 04:50:32,053 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:32,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:32,053 INFO L82 PathProgramCache]: Analyzing trace with hash -882504458, now seen corresponding path program 20 times [2020-10-13 04:50:32,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:32,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863300315] [2020-10-13 04:50:32,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:32,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:32,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:32,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:33,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:33,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 04:50:33,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:50:33,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1423 [2020-10-13 04:50:33,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:33,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:50:33,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:33,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 04:50:33,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:33,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:33,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:33,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:33,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:33,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:33,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:33,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:50:33,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:33,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:33,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:33,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:33,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:33,822 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:50:33,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863300315] [2020-10-13 04:50:33,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:33,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:50:33,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996643626] [2020-10-13 04:50:33,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:50:33,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:33,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:50:33,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:50:33,824 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 24 states. [2020-10-13 04:50:34,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:34,023 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2020-10-13 04:50:34,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:50:34,025 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 56 [2020-10-13 04:50:34,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:34,026 INFO L225 Difference]: With dead ends: 78 [2020-10-13 04:50:34,026 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 04:50:34,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:50:34,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 04:50:34,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-13 04:50:34,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 04:50:34,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-10-13 04:50:34,031 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 56 [2020-10-13 04:50:34,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:34,033 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-10-13 04:50:34,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:50:34,033 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-10-13 04:50:34,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 04:50:34,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:34,037 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:34,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 04:50:34,037 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:34,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:34,038 INFO L82 PathProgramCache]: Analyzing trace with hash -120573544, now seen corresponding path program 21 times [2020-10-13 04:50:34,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:34,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573579555] [2020-10-13 04:50:34,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:34,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:34,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:35,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:35,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 04:50:35,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:50:35,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1383 [2020-10-13 04:50:35,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:35,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 04:50:35,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:35,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 04:50:35,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:35,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:35,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:35,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:35,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:35,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:35,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:35,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:50:35,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:35,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:35,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:35,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:35,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:35,812 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:50:35,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573579555] [2020-10-13 04:50:35,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:35,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 04:50:35,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764635098] [2020-10-13 04:50:35,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 04:50:35,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:35,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 04:50:35,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:50:35,815 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 25 states. [2020-10-13 04:50:35,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:35,945 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2020-10-13 04:50:35,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 04:50:35,946 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 58 [2020-10-13 04:50:35,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:35,947 INFO L225 Difference]: With dead ends: 80 [2020-10-13 04:50:35,947 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 04:50:35,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:50:35,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 04:50:35,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-13 04:50:35,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 04:50:35,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2020-10-13 04:50:35,952 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 58 [2020-10-13 04:50:35,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:35,952 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2020-10-13 04:50:35,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 04:50:35,953 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2020-10-13 04:50:35,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 04:50:35,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:35,953 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:35,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 04:50:35,954 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:35,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:35,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1950594490, now seen corresponding path program 22 times [2020-10-13 04:50:35,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:35,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061992172] [2020-10-13 04:50:35,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:35,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:35,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:36,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:37,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:37,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 04:50:37,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:50:37,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1399 [2020-10-13 04:50:37,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:37,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:50:37,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:37,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 04:50:37,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:37,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:37,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:37,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:37,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:37,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:37,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:37,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:50:37,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:37,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:37,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:37,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:37,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:37,792 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:50:37,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061992172] [2020-10-13 04:50:37,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:37,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 04:50:37,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960165756] [2020-10-13 04:50:37,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 04:50:37,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:37,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 04:50:37,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:50:37,795 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 26 states. [2020-10-13 04:50:38,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:38,032 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2020-10-13 04:50:38,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 04:50:38,033 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 60 [2020-10-13 04:50:38,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:38,034 INFO L225 Difference]: With dead ends: 82 [2020-10-13 04:50:38,035 INFO L226 Difference]: Without dead ends: 68 [2020-10-13 04:50:38,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:50:38,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-13 04:50:38,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-13 04:50:38,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 04:50:38,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-10-13 04:50:38,042 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 60 [2020-10-13 04:50:38,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:38,042 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-10-13 04:50:38,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 04:50:38,043 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-10-13 04:50:38,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 04:50:38,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:38,044 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:38,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 04:50:38,048 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:38,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:38,048 INFO L82 PathProgramCache]: Analyzing trace with hash -521750180, now seen corresponding path program 23 times [2020-10-13 04:50:38,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:38,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609427554] [2020-10-13 04:50:38,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:38,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:38,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:38,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:39,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:39,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 04:50:39,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:50:39,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1424 [2020-10-13 04:50:39,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:39,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 04:50:39,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:39,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 04:50:39,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:39,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:39,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:39,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:39,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:39,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:39,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:39,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:50:39,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:39,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:39,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:39,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:39,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:39,922 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:50:39,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609427554] [2020-10-13 04:50:39,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:39,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 04:50:39,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237461447] [2020-10-13 04:50:39,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 04:50:39,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:39,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 04:50:39,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:50:39,925 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 27 states. [2020-10-13 04:50:40,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:40,045 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2020-10-13 04:50:40,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 04:50:40,045 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 62 [2020-10-13 04:50:40,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:40,046 INFO L225 Difference]: With dead ends: 84 [2020-10-13 04:50:40,046 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 04:50:40,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:50:40,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 04:50:40,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-13 04:50:40,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 04:50:40,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2020-10-13 04:50:40,050 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 62 [2020-10-13 04:50:40,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:40,051 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2020-10-13 04:50:40,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 04:50:40,051 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2020-10-13 04:50:40,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 04:50:40,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:40,052 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:40,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 04:50:40,052 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:40,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:40,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1328063362, now seen corresponding path program 24 times [2020-10-13 04:50:40,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:40,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108107956] [2020-10-13 04:50:40,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:40,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:40,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:40,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:41,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:41,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 04:50:41,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:50:41,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1615 [2020-10-13 04:50:41,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:41,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 04:50:41,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:41,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 04:50:41,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:42,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:42,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:42,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:42,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:42,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:42,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:42,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:50:42,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:42,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:42,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:42,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:42,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:42,164 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:50:42,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108107956] [2020-10-13 04:50:42,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:42,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 04:50:42,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212776079] [2020-10-13 04:50:42,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 04:50:42,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:42,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 04:50:42,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:50:42,167 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 28 states. [2020-10-13 04:50:42,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:42,418 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2020-10-13 04:50:42,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 04:50:42,419 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 64 [2020-10-13 04:50:42,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:42,420 INFO L225 Difference]: With dead ends: 86 [2020-10-13 04:50:42,420 INFO L226 Difference]: Without dead ends: 72 [2020-10-13 04:50:42,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:50:42,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-13 04:50:42,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-13 04:50:42,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 04:50:42,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2020-10-13 04:50:42,425 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 64 [2020-10-13 04:50:42,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:42,425 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2020-10-13 04:50:42,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 04:50:42,425 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2020-10-13 04:50:42,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 04:50:42,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:42,426 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:42,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 04:50:42,426 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:42,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:42,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1194049312, now seen corresponding path program 25 times [2020-10-13 04:50:42,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:42,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822146378] [2020-10-13 04:50:42,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:42,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:42,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:42,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:44,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:44,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 04:50:44,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:50:44,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1681 [2020-10-13 04:50:44,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:44,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 04:50:44,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:44,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 04:50:44,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:44,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:44,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:44,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:44,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:44,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:44,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:44,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:50:44,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:44,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:44,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:44,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:44,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:50:44,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822146378] [2020-10-13 04:50:44,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:44,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 04:50:44,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531182890] [2020-10-13 04:50:44,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 04:50:44,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:44,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 04:50:44,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:50:44,612 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand 29 states. [2020-10-13 04:50:44,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:44,868 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2020-10-13 04:50:44,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 04:50:44,869 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 66 [2020-10-13 04:50:44,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:44,870 INFO L225 Difference]: With dead ends: 88 [2020-10-13 04:50:44,870 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 04:50:44,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:50:44,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 04:50:44,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-13 04:50:44,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 04:50:44,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2020-10-13 04:50:44,879 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 66 [2020-10-13 04:50:44,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:44,880 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2020-10-13 04:50:44,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 04:50:44,880 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2020-10-13 04:50:44,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 04:50:44,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:44,880 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:44,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 04:50:44,881 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:44,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:44,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1712193214, now seen corresponding path program 26 times [2020-10-13 04:50:44,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:44,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974466001] [2020-10-13 04:50:44,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:44,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:44,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:44,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:46,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:46,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 04:50:46,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:50:46,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1585 [2020-10-13 04:50:46,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:46,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 04:50:46,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:46,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 04:50:46,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:46,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:46,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:46,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:46,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:46,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:46,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:46,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:50:46,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:46,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:46,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:46,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:46,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:46,994 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:50:46,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974466001] [2020-10-13 04:50:46,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:46,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 04:50:46,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236498562] [2020-10-13 04:50:46,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 04:50:46,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:46,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 04:50:46,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:50:46,997 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand 30 states. [2020-10-13 04:50:47,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:47,166 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2020-10-13 04:50:47,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 04:50:47,166 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 68 [2020-10-13 04:50:47,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:47,168 INFO L225 Difference]: With dead ends: 90 [2020-10-13 04:50:47,168 INFO L226 Difference]: Without dead ends: 76 [2020-10-13 04:50:47,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:50:47,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-13 04:50:47,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-13 04:50:47,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 04:50:47,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2020-10-13 04:50:47,173 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 68 [2020-10-13 04:50:47,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:47,173 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2020-10-13 04:50:47,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 04:50:47,174 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2020-10-13 04:50:47,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 04:50:47,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:47,174 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:47,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 04:50:47,175 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:47,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:47,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1412448996, now seen corresponding path program 27 times [2020-10-13 04:50:47,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:47,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669390234] [2020-10-13 04:50:47,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:47,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:47,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:47,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:48,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:48,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 04:50:48,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:50:48,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1651 [2020-10-13 04:50:48,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:48,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 04:50:48,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:48,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 04:50:48,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:49,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:49,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:49,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:49,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:49,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:49,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:49,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:50:49,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:49,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:49,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:49,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:49,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:49,404 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:50:49,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1669390234] [2020-10-13 04:50:49,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:49,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 04:50:49,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065497945] [2020-10-13 04:50:49,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 04:50:49,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:49,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 04:50:49,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:50:49,406 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand 31 states. [2020-10-13 04:50:49,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:49,644 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2020-10-13 04:50:49,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 04:50:49,644 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 70 [2020-10-13 04:50:49,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:49,646 INFO L225 Difference]: With dead ends: 92 [2020-10-13 04:50:49,646 INFO L226 Difference]: Without dead ends: 78 [2020-10-13 04:50:49,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:50:49,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-13 04:50:49,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-13 04:50:49,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-13 04:50:49,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2020-10-13 04:50:49,651 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 70 [2020-10-13 04:50:49,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:49,651 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2020-10-13 04:50:49,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 04:50:49,652 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2020-10-13 04:50:49,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 04:50:49,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:49,652 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:49,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 04:50:49,653 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:49,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:49,653 INFO L82 PathProgramCache]: Analyzing trace with hash 2011472902, now seen corresponding path program 28 times [2020-10-13 04:50:49,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:49,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960561396] [2020-10-13 04:50:49,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:49,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:49,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:49,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:51,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:51,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 04:50:51,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:50:51,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1738 [2020-10-13 04:50:51,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:51,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 04:50:51,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:51,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 04:50:51,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:51,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:51,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:51,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:51,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:51,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:51,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:51,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:50:51,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:51,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:51,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:51,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:51,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:52,001 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:50:52,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1960561396] [2020-10-13 04:50:52,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:52,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 04:50:52,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716682347] [2020-10-13 04:50:52,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 04:50:52,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:52,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 04:50:52,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:50:52,004 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 32 states. [2020-10-13 04:50:52,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:52,256 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2020-10-13 04:50:52,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 04:50:52,257 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 72 [2020-10-13 04:50:52,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:52,259 INFO L225 Difference]: With dead ends: 94 [2020-10-13 04:50:52,259 INFO L226 Difference]: Without dead ends: 80 [2020-10-13 04:50:52,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:50:52,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-13 04:50:52,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-13 04:50:52,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 04:50:52,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2020-10-13 04:50:52,264 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 72 [2020-10-13 04:50:52,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:52,264 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2020-10-13 04:50:52,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 04:50:52,264 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2020-10-13 04:50:52,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 04:50:52,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:52,265 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:52,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 04:50:52,265 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:52,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:52,266 INFO L82 PathProgramCache]: Analyzing trace with hash -2147138392, now seen corresponding path program 29 times [2020-10-13 04:50:52,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:52,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342864001] [2020-10-13 04:50:52,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:52,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:52,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:52,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:54,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:54,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 04:50:54,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:50:54,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1719 [2020-10-13 04:50:54,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:54,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 04:50:54,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:54,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 04:50:54,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:54,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:54,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:54,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:54,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:54,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:54,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:54,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:50:54,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:54,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:54,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:54,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:54,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:50:54,633 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:50:54,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342864001] [2020-10-13 04:50:54,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:54,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 04:50:54,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422705066] [2020-10-13 04:50:54,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 04:50:54,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:54,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 04:50:54,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:50:54,637 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 33 states. [2020-10-13 04:50:54,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:54,818 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2020-10-13 04:50:54,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 04:50:54,819 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 74 [2020-10-13 04:50:54,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:54,820 INFO L225 Difference]: With dead ends: 96 [2020-10-13 04:50:54,820 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 04:50:54,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:50:54,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 04:50:54,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-13 04:50:54,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 04:50:54,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2020-10-13 04:50:54,826 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 74 [2020-10-13 04:50:54,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:54,826 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2020-10-13 04:50:54,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 04:50:54,827 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2020-10-13 04:50:54,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 04:50:54,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:54,827 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:54,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 04:50:54,828 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:54,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:54,828 INFO L82 PathProgramCache]: Analyzing trace with hash 41960650, now seen corresponding path program 30 times [2020-10-13 04:50:54,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:54,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89609330] [2020-10-13 04:50:54,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:54,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:54,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:54,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:56,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:56,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 04:50:56,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:50:56,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1905 [2020-10-13 04:50:56,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:56,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 04:50:56,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:56,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 04:50:56,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:57,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:57,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:57,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:57,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:57,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:57,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:57,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:50:57,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:57,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:57,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:57,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:57,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:57,430 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:50:57,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89609330] [2020-10-13 04:50:57,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:57,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 04:50:57,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885355044] [2020-10-13 04:50:57,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 04:50:57,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:57,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 04:50:57,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:50:57,433 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand 34 states. [2020-10-13 04:50:57,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:57,687 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2020-10-13 04:50:57,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 04:50:57,687 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 76 [2020-10-13 04:50:57,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:57,688 INFO L225 Difference]: With dead ends: 98 [2020-10-13 04:50:57,688 INFO L226 Difference]: Without dead ends: 84 [2020-10-13 04:50:57,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:50:57,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-13 04:50:57,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-13 04:50:57,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 04:50:57,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2020-10-13 04:50:57,694 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 76 [2020-10-13 04:50:57,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:57,694 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2020-10-13 04:50:57,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 04:50:57,695 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2020-10-13 04:50:57,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 04:50:57,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:57,695 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:57,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 04:50:57,696 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:57,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:57,696 INFO L82 PathProgramCache]: Analyzing trace with hash -767835028, now seen corresponding path program 31 times [2020-10-13 04:50:57,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:57,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914980997] [2020-10-13 04:50:57,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:57,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:57,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:57,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:59,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:59,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 04:50:59,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:50:59,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2115 [2020-10-13 04:50:59,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:59,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 04:50:59,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:59,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 04:50:59,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:00,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:00,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:00,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:00,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:00,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:00,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:00,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:51:00,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:00,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:00,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:00,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:00,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:00,506 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:51:00,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914980997] [2020-10-13 04:51:00,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:00,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 04:51:00,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231837211] [2020-10-13 04:51:00,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 04:51:00,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:00,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 04:51:00,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:51:00,509 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 35 states. [2020-10-13 04:51:00,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:00,802 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2020-10-13 04:51:00,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 04:51:00,803 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 78 [2020-10-13 04:51:00,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:00,804 INFO L225 Difference]: With dead ends: 100 [2020-10-13 04:51:00,804 INFO L226 Difference]: Without dead ends: 86 [2020-10-13 04:51:00,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:51:00,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-13 04:51:00,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-13 04:51:00,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-13 04:51:00,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2020-10-13 04:51:00,812 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 78 [2020-10-13 04:51:00,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:00,813 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2020-10-13 04:51:00,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 04:51:00,813 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2020-10-13 04:51:00,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 04:51:00,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:00,818 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:00,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 04:51:00,818 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:00,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:00,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1592401010, now seen corresponding path program 32 times [2020-10-13 04:51:00,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:00,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583910669] [2020-10-13 04:51:00,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:00,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:00,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:00,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:03,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:03,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 04:51:03,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:51:03,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2282 [2020-10-13 04:51:03,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:03,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 04:51:03,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:51:03,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 04:51:03,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:03,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:03,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:03,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:03,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:03,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:03,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:03,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:51:03,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:03,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:03,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:03,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:03,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:03,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:51:03,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583910669] [2020-10-13 04:51:03,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:03,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 04:51:03,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065258136] [2020-10-13 04:51:03,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 04:51:03,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:03,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 04:51:03,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:51:03,852 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand 36 states. [2020-10-13 04:51:04,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:04,083 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2020-10-13 04:51:04,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 04:51:04,084 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 80 [2020-10-13 04:51:04,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:04,085 INFO L225 Difference]: With dead ends: 102 [2020-10-13 04:51:04,085 INFO L226 Difference]: Without dead ends: 88 [2020-10-13 04:51:04,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:51:04,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-13 04:51:04,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-13 04:51:04,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-13 04:51:04,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2020-10-13 04:51:04,091 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 80 [2020-10-13 04:51:04,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:04,091 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2020-10-13 04:51:04,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 04:51:04,092 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2020-10-13 04:51:04,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 04:51:04,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:04,092 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:04,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 04:51:04,093 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:04,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:04,093 INFO L82 PathProgramCache]: Analyzing trace with hash 568640048, now seen corresponding path program 33 times [2020-10-13 04:51:04,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:04,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530264128] [2020-10-13 04:51:04,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:04,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:04,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:04,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:06,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:06,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 04:51:06,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:51:06,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2403 [2020-10-13 04:51:06,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:06,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 04:51:06,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:51:06,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 04:51:06,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:07,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:07,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:07,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:07,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:07,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:07,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:07,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:51:07,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:07,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:07,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:07,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:07,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:07,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:51:07,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530264128] [2020-10-13 04:51:07,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:07,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 04:51:07,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166620508] [2020-10-13 04:51:07,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 04:51:07,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:07,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 04:51:07,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:51:07,279 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand 37 states. [2020-10-13 04:51:07,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:07,495 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2020-10-13 04:51:07,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 04:51:07,496 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 82 [2020-10-13 04:51:07,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:07,497 INFO L225 Difference]: With dead ends: 104 [2020-10-13 04:51:07,497 INFO L226 Difference]: Without dead ends: 90 [2020-10-13 04:51:07,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:51:07,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-13 04:51:07,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-13 04:51:07,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-13 04:51:07,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2020-10-13 04:51:07,503 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 82 [2020-10-13 04:51:07,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:07,504 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2020-10-13 04:51:07,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 04:51:07,504 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2020-10-13 04:51:07,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 04:51:07,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:07,504 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:07,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 04:51:07,505 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:07,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:07,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1435074478, now seen corresponding path program 34 times [2020-10-13 04:51:07,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:07,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255539444] [2020-10-13 04:51:07,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:07,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:07,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:07,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:10,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:10,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 04:51:10,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:51:10,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2703 [2020-10-13 04:51:10,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:10,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 04:51:10,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:51:10,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 04:51:10,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:11,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:11,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:11,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:11,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:11,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:11,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:11,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:51:11,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:11,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:11,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:11,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:11,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:11,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:51:11,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255539444] [2020-10-13 04:51:11,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:11,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 04:51:11,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465949992] [2020-10-13 04:51:11,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 04:51:11,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:11,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 04:51:11,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:51:11,035 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand 38 states. [2020-10-13 04:51:11,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:11,246 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2020-10-13 04:51:11,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 04:51:11,247 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 84 [2020-10-13 04:51:11,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:11,248 INFO L225 Difference]: With dead ends: 106 [2020-10-13 04:51:11,248 INFO L226 Difference]: Without dead ends: 92 [2020-10-13 04:51:11,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:51:11,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-13 04:51:11,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-13 04:51:11,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-13 04:51:11,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2020-10-13 04:51:11,254 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 84 [2020-10-13 04:51:11,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:11,254 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2020-10-13 04:51:11,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 04:51:11,255 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2020-10-13 04:51:11,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 04:51:11,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:11,256 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:11,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 04:51:11,256 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:11,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:11,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1435581940, now seen corresponding path program 35 times [2020-10-13 04:51:11,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:11,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998608083] [2020-10-13 04:51:11,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:11,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:11,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:11,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:14,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:14,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 04:51:14,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:51:14,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2867 [2020-10-13 04:51:14,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:14,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 04:51:14,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:51:14,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 04:51:14,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:15,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:15,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:15,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:15,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:15,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:15,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:15,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:51:15,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:15,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:15,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:15,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:15,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:15,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:51:15,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998608083] [2020-10-13 04:51:15,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:15,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 04:51:15,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7164932] [2020-10-13 04:51:15,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 04:51:15,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:15,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 04:51:15,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 04:51:15,029 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand 39 states. [2020-10-13 04:51:15,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:15,257 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2020-10-13 04:51:15,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 04:51:15,258 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 86 [2020-10-13 04:51:15,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:15,259 INFO L225 Difference]: With dead ends: 108 [2020-10-13 04:51:15,260 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 04:51:15,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 04:51:15,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 04:51:15,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-13 04:51:15,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-13 04:51:15,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2020-10-13 04:51:15,270 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 86 [2020-10-13 04:51:15,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:15,270 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2020-10-13 04:51:15,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 04:51:15,271 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2020-10-13 04:51:15,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 04:51:15,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:15,272 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:15,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 04:51:15,272 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:15,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:15,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1527571690, now seen corresponding path program 36 times [2020-10-13 04:51:15,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:15,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511994368] [2020-10-13 04:51:15,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:15,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:15,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:15,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:18,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:18,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-13 04:51:18,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:51:18,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3161 [2020-10-13 04:51:18,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:18,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 04:51:18,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:51:18,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 04:51:18,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:19,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:19,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:19,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:19,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:19,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:19,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:19,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:51:19,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:19,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:19,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:19,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:19,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:19,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:51:19,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511994368] [2020-10-13 04:51:19,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:19,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 04:51:19,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139312077] [2020-10-13 04:51:19,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 04:51:19,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:19,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 04:51:19,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 04:51:19,364 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand 40 states. [2020-10-13 04:51:19,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:19,690 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2020-10-13 04:51:19,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 04:51:19,691 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 88 [2020-10-13 04:51:19,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:19,692 INFO L225 Difference]: With dead ends: 110 [2020-10-13 04:51:19,692 INFO L226 Difference]: Without dead ends: 96 [2020-10-13 04:51:19,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 04:51:19,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-13 04:51:19,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-13 04:51:19,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-13 04:51:19,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2020-10-13 04:51:19,699 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 88 [2020-10-13 04:51:19,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:19,699 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2020-10-13 04:51:19,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 04:51:19,699 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2020-10-13 04:51:19,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 04:51:19,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:19,700 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:19,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 04:51:19,701 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:19,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:19,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1554892872, now seen corresponding path program 37 times [2020-10-13 04:51:19,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:19,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76916113] [2020-10-13 04:51:19,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:19,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:19,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:19,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:23,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:23,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-13 04:51:23,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:51:23,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3372 [2020-10-13 04:51:23,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:23,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 04:51:23,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:51:23,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 04:51:23,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:24,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:24,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:24,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:24,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:24,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:24,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:24,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:51:24,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:24,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:24,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:24,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:24,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:24,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:51:24,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76916113] [2020-10-13 04:51:24,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:24,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 04:51:24,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821526187] [2020-10-13 04:51:24,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 04:51:24,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:24,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 04:51:24,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 04:51:24,061 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand 41 states. [2020-10-13 04:51:24,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:24,375 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2020-10-13 04:51:24,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 04:51:24,376 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 90 [2020-10-13 04:51:24,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:24,377 INFO L225 Difference]: With dead ends: 112 [2020-10-13 04:51:24,377 INFO L226 Difference]: Without dead ends: 98 [2020-10-13 04:51:24,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 04:51:24,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-13 04:51:24,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-13 04:51:24,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 04:51:24,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2020-10-13 04:51:24,383 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 90 [2020-10-13 04:51:24,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:24,383 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2020-10-13 04:51:24,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 04:51:24,384 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2020-10-13 04:51:24,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 04:51:24,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:24,385 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:24,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 04:51:24,385 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:24,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:24,385 INFO L82 PathProgramCache]: Analyzing trace with hash -2040744998, now seen corresponding path program 38 times [2020-10-13 04:51:24,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:24,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257316958] [2020-10-13 04:51:24,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:24,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:24,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:24,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:26,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:26,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 04:51:26,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:51:26,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2511 [2020-10-13 04:51:26,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:26,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 04:51:26,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:51:26,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-13 04:51:26,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:27,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:27,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:27,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:27,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:27,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:27,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:27,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:51:27,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:27,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:27,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:27,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:27,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:27,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:51:27,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257316958] [2020-10-13 04:51:27,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:27,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 04:51:27,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553405721] [2020-10-13 04:51:27,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 04:51:27,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:27,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 04:51:27,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 04:51:27,916 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand 42 states. [2020-10-13 04:51:28,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:28,182 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2020-10-13 04:51:28,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 04:51:28,183 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 92 [2020-10-13 04:51:28,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:28,184 INFO L225 Difference]: With dead ends: 114 [2020-10-13 04:51:28,184 INFO L226 Difference]: Without dead ends: 100 [2020-10-13 04:51:28,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 04:51:28,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-13 04:51:28,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-13 04:51:28,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-13 04:51:28,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2020-10-13 04:51:28,192 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 92 [2020-10-13 04:51:28,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:28,192 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2020-10-13 04:51:28,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 04:51:28,192 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2020-10-13 04:51:28,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-13 04:51:28,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:28,194 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:28,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 04:51:28,195 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:28,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:28,195 INFO L82 PathProgramCache]: Analyzing trace with hash -793202820, now seen corresponding path program 39 times [2020-10-13 04:51:28,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:28,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034053422] [2020-10-13 04:51:28,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:28,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:28,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:28,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:30,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:30,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 04:51:30,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:51:30,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2631 [2020-10-13 04:51:30,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:30,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 04:51:30,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:51:30,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 04:51:30,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:31,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:31,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:31,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:31,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:31,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:31,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:31,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:51:31,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:31,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:31,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:31,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:31,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:31,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:51:31,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034053422] [2020-10-13 04:51:31,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:31,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 04:51:31,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493894563] [2020-10-13 04:51:31,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 04:51:31,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:31,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 04:51:31,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 04:51:31,922 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand 43 states. [2020-10-13 04:51:32,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:32,264 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2020-10-13 04:51:32,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 04:51:32,264 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 94 [2020-10-13 04:51:32,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:32,266 INFO L225 Difference]: With dead ends: 116 [2020-10-13 04:51:32,266 INFO L226 Difference]: Without dead ends: 102 [2020-10-13 04:51:32,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 04:51:32,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-13 04:51:32,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-10-13 04:51:32,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-13 04:51:32,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2020-10-13 04:51:32,273 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 94 [2020-10-13 04:51:32,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:32,273 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2020-10-13 04:51:32,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 04:51:32,274 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2020-10-13 04:51:32,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-13 04:51:32,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:32,274 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:32,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 04:51:32,275 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:32,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:32,275 INFO L82 PathProgramCache]: Analyzing trace with hash -201045346, now seen corresponding path program 40 times [2020-10-13 04:51:32,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:32,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420999104] [2020-10-13 04:51:32,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:32,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:32,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:33,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:35,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:35,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 04:51:35,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:51:35,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2968 [2020-10-13 04:51:35,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:35,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 04:51:35,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:51:35,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-13 04:51:35,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:36,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:36,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:36,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:36,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:36,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:36,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:36,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:51:36,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:36,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:36,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:36,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:36,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:36,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:51:36,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420999104] [2020-10-13 04:51:36,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:36,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-13 04:51:36,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954130812] [2020-10-13 04:51:36,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-13 04:51:36,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:36,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-13 04:51:36,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 04:51:36,381 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand 44 states. [2020-10-13 04:51:36,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:36,700 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2020-10-13 04:51:36,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 04:51:36,701 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 96 [2020-10-13 04:51:36,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:36,702 INFO L225 Difference]: With dead ends: 118 [2020-10-13 04:51:36,702 INFO L226 Difference]: Without dead ends: 104 [2020-10-13 04:51:36,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 04:51:36,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-13 04:51:36,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-13 04:51:36,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-13 04:51:36,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2020-10-13 04:51:36,708 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 96 [2020-10-13 04:51:36,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:36,708 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2020-10-13 04:51:36,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-13 04:51:36,708 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2020-10-13 04:51:36,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-13 04:51:36,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:36,709 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:36,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 04:51:36,710 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:36,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:36,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1926604096, now seen corresponding path program 41 times [2020-10-13 04:51:36,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:36,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509452360] [2020-10-13 04:51:36,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:36,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:36,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:36,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:39,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:39,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-13 04:51:39,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:51:39,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3196 [2020-10-13 04:51:39,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:39,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-13 04:51:39,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:51:39,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-13 04:51:39,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:41,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:41,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:41,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:41,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:41,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:41,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:41,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:51:41,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:41,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:41,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:41,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:41,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:41,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:51:41,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509452360] [2020-10-13 04:51:41,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:41,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-13 04:51:41,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543232462] [2020-10-13 04:51:41,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-13 04:51:41,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:41,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-13 04:51:41,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 04:51:41,101 INFO L87 Difference]: Start difference. First operand 103 states and 106 transitions. Second operand 45 states. [2020-10-13 04:51:41,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:41,381 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2020-10-13 04:51:41,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-13 04:51:41,382 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 98 [2020-10-13 04:51:41,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:41,383 INFO L225 Difference]: With dead ends: 120 [2020-10-13 04:51:41,383 INFO L226 Difference]: Without dead ends: 106 [2020-10-13 04:51:41,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 04:51:41,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-13 04:51:41,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-10-13 04:51:41,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-13 04:51:41,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2020-10-13 04:51:41,392 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 98 [2020-10-13 04:51:41,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:41,392 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2020-10-13 04:51:41,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-13 04:51:41,392 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2020-10-13 04:51:41,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-13 04:51:41,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:41,395 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:41,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 04:51:41,395 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:41,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:41,395 INFO L82 PathProgramCache]: Analyzing trace with hash -2101682334, now seen corresponding path program 42 times [2020-10-13 04:51:41,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:41,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890540932] [2020-10-13 04:51:41,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:41,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:41,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:41,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:44,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:44,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 04:51:44,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:51:44,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3428 [2020-10-13 04:51:44,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:44,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-13 04:51:44,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:51:44,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-13 04:51:44,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:46,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:46,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:46,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:46,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:46,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:46,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:46,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:51:46,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:46,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:46,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:46,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:46,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:46,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:51:46,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890540932] [2020-10-13 04:51:46,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:46,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-13 04:51:46,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855903691] [2020-10-13 04:51:46,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-13 04:51:46,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:46,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-13 04:51:46,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 04:51:46,049 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand 46 states. [2020-10-13 04:51:46,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:46,341 INFO L93 Difference]: Finished difference Result 122 states and 128 transitions. [2020-10-13 04:51:46,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-13 04:51:46,342 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 100 [2020-10-13 04:51:46,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:46,343 INFO L225 Difference]: With dead ends: 122 [2020-10-13 04:51:46,343 INFO L226 Difference]: Without dead ends: 108 [2020-10-13 04:51:46,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 04:51:46,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-13 04:51:46,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-10-13 04:51:46,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-13 04:51:46,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2020-10-13 04:51:46,350 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 100 [2020-10-13 04:51:46,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:46,350 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2020-10-13 04:51:46,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-13 04:51:46,351 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2020-10-13 04:51:46,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 04:51:46,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:46,353 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:46,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 04:51:46,353 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:46,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:46,354 INFO L82 PathProgramCache]: Analyzing trace with hash 775559428, now seen corresponding path program 43 times [2020-10-13 04:51:46,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:46,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103959179] [2020-10-13 04:51:46,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:46,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:46,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:46,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:50,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:50,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 04:51:50,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:51:50,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4077 [2020-10-13 04:51:50,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:50,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-13 04:51:50,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:51:50,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-13 04:51:50,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:51,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:51,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:51,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:51,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:51,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:51,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:51,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:51:51,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:51,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:51,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:51,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:51,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:51,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:51:51,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103959179] [2020-10-13 04:51:51,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:51,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-13 04:51:51,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749716499] [2020-10-13 04:51:51,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-13 04:51:51,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:51,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-13 04:51:51,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 04:51:51,737 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand 47 states. [2020-10-13 04:51:51,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:51,992 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2020-10-13 04:51:51,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-13 04:51:51,992 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 102 [2020-10-13 04:51:51,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:51,994 INFO L225 Difference]: With dead ends: 124 [2020-10-13 04:51:51,994 INFO L226 Difference]: Without dead ends: 110 [2020-10-13 04:51:51,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 04:51:51,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-13 04:51:51,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-10-13 04:51:51,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-13 04:51:51,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2020-10-13 04:51:51,999 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 102 [2020-10-13 04:51:52,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:52,000 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2020-10-13 04:51:52,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-13 04:51:52,000 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2020-10-13 04:51:52,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 04:51:52,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:52,001 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:52,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 04:51:52,001 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:52,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:52,002 INFO L82 PathProgramCache]: Analyzing trace with hash -154045914, now seen corresponding path program 44 times [2020-10-13 04:51:52,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:52,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020330321] [2020-10-13 04:51:52,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:52,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:52,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:52,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:55,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:55,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-13 04:51:55,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:51:55,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3872 [2020-10-13 04:51:55,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:55,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-13 04:51:55,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:51:55,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-13 04:51:55,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:57,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:57,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:57,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:57,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:57,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:57,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:57,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:51:57,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:57,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:57,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:57,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:57,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:57,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:51:57,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020330321] [2020-10-13 04:51:57,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:57,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-13 04:51:57,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955678065] [2020-10-13 04:51:57,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-13 04:51:57,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:57,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-13 04:51:57,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 04:51:57,247 INFO L87 Difference]: Start difference. First operand 109 states and 112 transitions. Second operand 48 states. [2020-10-13 04:51:57,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:57,533 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2020-10-13 04:51:57,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-13 04:51:57,534 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 104 [2020-10-13 04:51:57,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:57,535 INFO L225 Difference]: With dead ends: 126 [2020-10-13 04:51:57,536 INFO L226 Difference]: Without dead ends: 112 [2020-10-13 04:51:57,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 04:51:57,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-13 04:51:57,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-13 04:51:57,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-13 04:51:57,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2020-10-13 04:51:57,541 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 104 [2020-10-13 04:51:57,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:57,541 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2020-10-13 04:51:57,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-13 04:51:57,541 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2020-10-13 04:51:57,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-13 04:51:57,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:57,542 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:57,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 04:51:57,543 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:57,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:57,543 INFO L82 PathProgramCache]: Analyzing trace with hash -151582008, now seen corresponding path program 45 times [2020-10-13 04:51:57,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:57,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710948792] [2020-10-13 04:51:57,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:57,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:57,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:57,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:01,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:01,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-13 04:52:01,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:52:01,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4037 [2020-10-13 04:52:01,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:01,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-13 04:52:01,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:52:01,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-13 04:52:01,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:02,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:52:02,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:02,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:02,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:02,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:52:02,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:52:02,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:52:02,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:02,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:52:02,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:52:02,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:52:02,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:02,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:52:02,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710948792] [2020-10-13 04:52:02,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:52:02,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-13 04:52:02,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851001107] [2020-10-13 04:52:02,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-13 04:52:02,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:52:02,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-13 04:52:02,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 04:52:02,984 INFO L87 Difference]: Start difference. First operand 111 states and 114 transitions. Second operand 49 states. [2020-10-13 04:52:03,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:52:03,352 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2020-10-13 04:52:03,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-13 04:52:03,353 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 106 [2020-10-13 04:52:03,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:52:03,354 INFO L225 Difference]: With dead ends: 128 [2020-10-13 04:52:03,354 INFO L226 Difference]: Without dead ends: 114 [2020-10-13 04:52:03,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 04:52:03,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-13 04:52:03,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-10-13 04:52:03,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-13 04:52:03,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 116 transitions. [2020-10-13 04:52:03,360 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 116 transitions. Word has length 106 [2020-10-13 04:52:03,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:52:03,360 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 116 transitions. [2020-10-13 04:52:03,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-13 04:52:03,360 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 116 transitions. [2020-10-13 04:52:03,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-13 04:52:03,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:52:03,361 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:52:03,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 04:52:03,361 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:52:03,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:52:03,362 INFO L82 PathProgramCache]: Analyzing trace with hash -2078735638, now seen corresponding path program 46 times [2020-10-13 04:52:03,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:52:03,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151219134] [2020-10-13 04:52:03,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:52:03,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:03,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:03,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:07,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:07,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-13 04:52:07,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:52:07,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4201 [2020-10-13 04:52:07,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:07,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-13 04:52:07,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:52:07,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-13 04:52:07,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:09,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:52:09,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:09,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:09,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:09,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:52:09,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:52:09,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:52:09,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:09,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:52:09,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:52:09,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:52:09,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:09,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:52:09,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151219134] [2020-10-13 04:52:09,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:52:09,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-13 04:52:09,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154740019] [2020-10-13 04:52:09,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-13 04:52:09,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:52:09,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-13 04:52:09,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 04:52:09,019 INFO L87 Difference]: Start difference. First operand 113 states and 116 transitions. Second operand 50 states. [2020-10-13 04:52:09,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:52:09,425 INFO L93 Difference]: Finished difference Result 130 states and 136 transitions. [2020-10-13 04:52:09,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-13 04:52:09,426 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 108 [2020-10-13 04:52:09,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:52:09,427 INFO L225 Difference]: With dead ends: 130 [2020-10-13 04:52:09,428 INFO L226 Difference]: Without dead ends: 116 [2020-10-13 04:52:09,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 04:52:09,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-13 04:52:09,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-10-13 04:52:09,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-13 04:52:09,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2020-10-13 04:52:09,433 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 108 [2020-10-13 04:52:09,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:52:09,434 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2020-10-13 04:52:09,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-13 04:52:09,434 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2020-10-13 04:52:09,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-13 04:52:09,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:52:09,435 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:52:09,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 04:52:09,435 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:52:09,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:52:09,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1352497804, now seen corresponding path program 47 times [2020-10-13 04:52:09,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:52:09,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038546124] [2020-10-13 04:52:09,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:52:09,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:09,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:09,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:14,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:14,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-13 04:52:14,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:52:14,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4662 [2020-10-13 04:52:14,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:14,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-13 04:52:14,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:52:14,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-13 04:52:14,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:15,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:52:15,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:15,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:15,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:15,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:52:15,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:52:15,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:52:15,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:15,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:52:15,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:52:15,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:52:15,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:15,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:52:15,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038546124] [2020-10-13 04:52:15,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:52:15,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-13 04:52:15,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281749432] [2020-10-13 04:52:15,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-13 04:52:15,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:52:15,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-13 04:52:15,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 04:52:15,637 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand 51 states. [2020-10-13 04:52:15,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:52:15,934 INFO L93 Difference]: Finished difference Result 132 states and 138 transitions. [2020-10-13 04:52:15,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-13 04:52:15,935 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 110 [2020-10-13 04:52:15,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:52:15,936 INFO L225 Difference]: With dead ends: 132 [2020-10-13 04:52:15,937 INFO L226 Difference]: Without dead ends: 118 [2020-10-13 04:52:15,937 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 04:52:15,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-13 04:52:15,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-10-13 04:52:15,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-13 04:52:15,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2020-10-13 04:52:15,943 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 110 [2020-10-13 04:52:15,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:52:15,943 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2020-10-13 04:52:15,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-13 04:52:15,944 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2020-10-13 04:52:15,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-13 04:52:15,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:52:15,944 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:52:15,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 04:52:15,945 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:52:15,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:52:15,945 INFO L82 PathProgramCache]: Analyzing trace with hash 232952238, now seen corresponding path program 48 times [2020-10-13 04:52:15,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:52:15,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076339499] [2020-10-13 04:52:15,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:52:15,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:15,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:16,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:20,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:20,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-13 04:52:20,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:52:20,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4831 [2020-10-13 04:52:20,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:20,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-13 04:52:20,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:52:20,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-13 04:52:20,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:22,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:52:22,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:22,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:22,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:22,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:52:22,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:52:22,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:52:22,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:22,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:52:22,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:52:22,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:52:22,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:22,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:52:22,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076339499] [2020-10-13 04:52:22,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:52:22,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-13 04:52:22,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978679380] [2020-10-13 04:52:22,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-13 04:52:22,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:52:22,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-13 04:52:22,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 04:52:22,366 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand 52 states. [2020-10-13 04:52:22,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:52:22,796 INFO L93 Difference]: Finished difference Result 134 states and 140 transitions. [2020-10-13 04:52:22,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-13 04:52:22,797 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 112 [2020-10-13 04:52:22,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:52:22,798 INFO L225 Difference]: With dead ends: 134 [2020-10-13 04:52:22,798 INFO L226 Difference]: Without dead ends: 120 [2020-10-13 04:52:22,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 04:52:22,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-13 04:52:22,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-10-13 04:52:22,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-13 04:52:22,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 122 transitions. [2020-10-13 04:52:22,804 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 122 transitions. Word has length 112 [2020-10-13 04:52:22,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:52:22,804 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 122 transitions. [2020-10-13 04:52:22,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-13 04:52:22,805 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 122 transitions. [2020-10-13 04:52:22,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-13 04:52:22,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:52:22,805 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:52:22,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 04:52:22,806 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:52:22,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:52:22,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1908512688, now seen corresponding path program 49 times [2020-10-13 04:52:22,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:52:22,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443034176] [2020-10-13 04:52:22,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:52:22,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:22,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:23,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:27,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:27,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-13 04:52:27,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:52:27,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-13 04:52:27,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:27,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-13 04:52:27,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:52:27,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-13 04:52:27,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:29,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:52:29,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:29,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:29,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:29,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:52:29,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:52:29,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:52:29,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:29,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:52:29,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:52:29,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:52:29,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:29,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:52:29,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443034176] [2020-10-13 04:52:29,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:52:29,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-13 04:52:29,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927310056] [2020-10-13 04:52:29,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-13 04:52:29,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:52:29,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-13 04:52:29,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 04:52:29,423 INFO L87 Difference]: Start difference. First operand 119 states and 122 transitions. Second operand 53 states. [2020-10-13 04:52:29,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:52:29,849 INFO L93 Difference]: Finished difference Result 136 states and 142 transitions. [2020-10-13 04:52:29,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-13 04:52:29,850 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 114 [2020-10-13 04:52:29,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:52:29,852 INFO L225 Difference]: With dead ends: 136 [2020-10-13 04:52:29,852 INFO L226 Difference]: Without dead ends: 122 [2020-10-13 04:52:29,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 04:52:29,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-13 04:52:29,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-10-13 04:52:29,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-13 04:52:29,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 124 transitions. [2020-10-13 04:52:29,856 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 124 transitions. Word has length 114 [2020-10-13 04:52:29,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:52:29,857 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 124 transitions. [2020-10-13 04:52:29,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-13 04:52:29,857 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 124 transitions. [2020-10-13 04:52:29,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-13 04:52:29,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:52:29,858 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:52:29,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-13 04:52:29,858 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:52:29,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:52:29,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1727995506, now seen corresponding path program 50 times [2020-10-13 04:52:29,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:52:29,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930626388] [2020-10-13 04:52:29,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:52:29,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:29,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:30,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:34,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:34,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-13 04:52:34,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:52:34,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:52:34,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:34,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-13 04:52:34,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:52:34,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-13 04:52:34,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:36,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:52:36,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:36,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:36,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:36,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:52:36,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:52:36,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:52:36,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:36,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:52:36,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:52:36,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:52:36,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:36,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:52:36,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930626388] [2020-10-13 04:52:36,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:52:36,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-13 04:52:36,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609733311] [2020-10-13 04:52:36,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-13 04:52:36,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:52:36,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-13 04:52:36,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-13 04:52:36,549 INFO L87 Difference]: Start difference. First operand 121 states and 124 transitions. Second operand 54 states. [2020-10-13 04:52:36,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:52:36,855 INFO L93 Difference]: Finished difference Result 138 states and 144 transitions. [2020-10-13 04:52:36,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-13 04:52:36,856 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 116 [2020-10-13 04:52:36,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:52:36,857 INFO L225 Difference]: With dead ends: 138 [2020-10-13 04:52:36,857 INFO L226 Difference]: Without dead ends: 124 [2020-10-13 04:52:36,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-13 04:52:36,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-13 04:52:36,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-10-13 04:52:36,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-13 04:52:36,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 126 transitions. [2020-10-13 04:52:36,864 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 126 transitions. Word has length 116 [2020-10-13 04:52:36,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:52:36,864 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 126 transitions. [2020-10-13 04:52:36,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-13 04:52:36,864 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 126 transitions. [2020-10-13 04:52:36,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-13 04:52:36,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:52:36,865 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:52:36,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-13 04:52:36,866 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:52:36,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:52:36,866 INFO L82 PathProgramCache]: Analyzing trace with hash 308990996, now seen corresponding path program 51 times [2020-10-13 04:52:36,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:52:36,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212010299] [2020-10-13 04:52:36,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:52:36,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:36,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:37,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:41,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:41,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-13 04:52:41,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:52:41,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-13 04:52:41,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:41,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-13 04:52:41,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:52:41,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-13 04:52:41,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:43,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:52:43,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:43,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:43,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:43,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:52:43,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:52:43,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:52:43,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:43,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:52:43,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:52:43,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:52:43,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:43,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:52:43,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212010299] [2020-10-13 04:52:43,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:52:43,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-13 04:52:43,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263204602] [2020-10-13 04:52:43,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-13 04:52:43,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:52:43,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-13 04:52:43,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-13 04:52:43,678 INFO L87 Difference]: Start difference. First operand 123 states and 126 transitions. Second operand 55 states. [2020-10-13 04:52:44,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:52:44,132 INFO L93 Difference]: Finished difference Result 140 states and 146 transitions. [2020-10-13 04:52:44,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-13 04:52:44,133 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 118 [2020-10-13 04:52:44,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:52:44,134 INFO L225 Difference]: With dead ends: 140 [2020-10-13 04:52:44,134 INFO L226 Difference]: Without dead ends: 126 [2020-10-13 04:52:44,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-13 04:52:44,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-13 04:52:44,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-10-13 04:52:44,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-13 04:52:44,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2020-10-13 04:52:44,140 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 118 [2020-10-13 04:52:44,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:52:44,140 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2020-10-13 04:52:44,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-13 04:52:44,141 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2020-10-13 04:52:44,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-13 04:52:44,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:52:44,141 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:52:44,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-13 04:52:44,142 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:52:44,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:52:44,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1849710282, now seen corresponding path program 52 times [2020-10-13 04:52:44,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:52:44,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147199660] [2020-10-13 04:52:44,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:52:44,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:44,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:44,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:49,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:49,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-13 04:52:49,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:52:49,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-13 04:52:49,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:49,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-13 04:52:49,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:52:49,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-13 04:52:49,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:51,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:52:51,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:51,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:51,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:51,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:52:51,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:52:51,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:52:51,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:51,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:52:51,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:52:51,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:52:51,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:51,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:52:51,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147199660] [2020-10-13 04:52:51,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:52:51,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-13 04:52:51,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225481005] [2020-10-13 04:52:51,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-13 04:52:51,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:52:51,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-13 04:52:51,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-13 04:52:51,021 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand 56 states. [2020-10-13 04:52:51,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:52:51,308 INFO L93 Difference]: Finished difference Result 142 states and 148 transitions. [2020-10-13 04:52:51,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-13 04:52:51,308 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 120 [2020-10-13 04:52:51,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:52:51,310 INFO L225 Difference]: With dead ends: 142 [2020-10-13 04:52:51,310 INFO L226 Difference]: Without dead ends: 128 [2020-10-13 04:52:51,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-13 04:52:51,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-13 04:52:51,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-10-13 04:52:51,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-13 04:52:51,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2020-10-13 04:52:51,316 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 120 [2020-10-13 04:52:51,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:52:51,316 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2020-10-13 04:52:51,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-13 04:52:51,316 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2020-10-13 04:52:51,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-13 04:52:51,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:52:51,317 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:52:51,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-13 04:52:51,318 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:52:51,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:52:51,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1892434472, now seen corresponding path program 53 times [2020-10-13 04:52:51,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:52:51,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361752435] [2020-10-13 04:52:51,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:52:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:51,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:51,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:56,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:56,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-13 04:52:56,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:52:56,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-13 04:52:56,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:56,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-13 04:52:56,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:52:56,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-13 04:52:56,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:58,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:52:58,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:58,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:58,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:58,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:52:58,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:52:58,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:52:58,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:58,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:52:58,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:52:58,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:52:58,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:58,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:52:58,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361752435] [2020-10-13 04:52:58,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:52:58,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-13 04:52:58,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785271474] [2020-10-13 04:52:58,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-13 04:52:58,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:52:58,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-13 04:52:58,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-13 04:52:58,299 INFO L87 Difference]: Start difference. First operand 127 states and 130 transitions. Second operand 57 states. [2020-10-13 04:52:58,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:52:58,736 INFO L93 Difference]: Finished difference Result 144 states and 150 transitions. [2020-10-13 04:52:58,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-13 04:52:58,737 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 122 [2020-10-13 04:52:58,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:52:58,739 INFO L225 Difference]: With dead ends: 144 [2020-10-13 04:52:58,739 INFO L226 Difference]: Without dead ends: 130 [2020-10-13 04:52:58,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-13 04:52:58,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-13 04:52:58,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-10-13 04:52:58,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-13 04:52:58,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 132 transitions. [2020-10-13 04:52:58,743 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 132 transitions. Word has length 122 [2020-10-13 04:52:58,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:52:58,744 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 132 transitions. [2020-10-13 04:52:58,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-13 04:52:58,744 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 132 transitions. [2020-10-13 04:52:58,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-13 04:52:58,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:52:58,745 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:52:58,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-13 04:52:58,745 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:52:58,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:52:58,746 INFO L82 PathProgramCache]: Analyzing trace with hash -708102, now seen corresponding path program 54 times [2020-10-13 04:52:58,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:52:58,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156715326] [2020-10-13 04:52:58,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:52:58,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:58,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:58,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:03,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:03,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-13 04:53:03,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:53:03,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-13 04:53:03,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:03,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-13 04:53:03,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:53:03,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-13 04:53:03,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:05,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:05,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:05,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:05,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:05,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:05,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:05,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:53:05,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:05,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:05,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:05,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:05,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:05,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:53:05,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156715326] [2020-10-13 04:53:05,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:05,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-13 04:53:05,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058363723] [2020-10-13 04:53:05,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-13 04:53:05,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:05,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-13 04:53:05,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 04:53:05,703 INFO L87 Difference]: Start difference. First operand 129 states and 132 transitions. Second operand 58 states. [2020-10-13 04:53:06,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:06,067 INFO L93 Difference]: Finished difference Result 146 states and 152 transitions. [2020-10-13 04:53:06,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-13 04:53:06,068 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 124 [2020-10-13 04:53:06,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:06,069 INFO L225 Difference]: With dead ends: 146 [2020-10-13 04:53:06,070 INFO L226 Difference]: Without dead ends: 132 [2020-10-13 04:53:06,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 04:53:06,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-13 04:53:06,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2020-10-13 04:53:06,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-13 04:53:06,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 134 transitions. [2020-10-13 04:53:06,076 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 134 transitions. Word has length 124 [2020-10-13 04:53:06,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:06,076 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 134 transitions. [2020-10-13 04:53:06,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-13 04:53:06,076 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 134 transitions. [2020-10-13 04:53:06,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-13 04:53:06,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:06,077 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:06,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-13 04:53:06,077 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:06,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:06,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1177167260, now seen corresponding path program 55 times [2020-10-13 04:53:06,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:06,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854941728] [2020-10-13 04:53:06,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:06,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:06,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:08,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:11,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:11,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-13 04:53:11,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:53:11,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-13 04:53:11,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:11,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-13 04:53:11,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:53:11,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-13 04:53:11,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:13,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:13,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:13,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:13,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:13,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:13,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:13,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:53:13,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:13,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:13,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:13,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:13,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:13,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:53:13,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854941728] [2020-10-13 04:53:13,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:13,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-13 04:53:13,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691544387] [2020-10-13 04:53:13,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-13 04:53:13,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:13,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-13 04:53:13,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-13 04:53:13,143 INFO L87 Difference]: Start difference. First operand 131 states and 134 transitions. Second operand 59 states. [2020-10-13 04:53:13,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:13,629 INFO L93 Difference]: Finished difference Result 148 states and 154 transitions. [2020-10-13 04:53:13,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-13 04:53:13,629 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 126 [2020-10-13 04:53:13,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:13,631 INFO L225 Difference]: With dead ends: 148 [2020-10-13 04:53:13,631 INFO L226 Difference]: Without dead ends: 134 [2020-10-13 04:53:13,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-13 04:53:13,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-13 04:53:13,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2020-10-13 04:53:13,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-13 04:53:13,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 136 transitions. [2020-10-13 04:53:13,636 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 136 transitions. Word has length 126 [2020-10-13 04:53:13,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:13,637 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 136 transitions. [2020-10-13 04:53:13,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-13 04:53:13,637 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 136 transitions. [2020-10-13 04:53:13,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-13 04:53:13,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:13,638 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:13,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-13 04:53:13,640 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:13,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:13,640 INFO L82 PathProgramCache]: Analyzing trace with hash -755976002, now seen corresponding path program 56 times [2020-10-13 04:53:13,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:13,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622674746] [2020-10-13 04:53:13,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:13,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:13,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:16,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:18,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:18,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-13 04:53:18,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:53:18,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:53:18,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:18,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-13 04:53:18,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:53:18,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-13 04:53:18,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:20,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:20,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:20,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:20,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:20,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:20,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:20,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:53:20,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:20,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:20,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:20,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:20,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:20,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:53:20,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622674746] [2020-10-13 04:53:20,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:20,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-13 04:53:20,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862877321] [2020-10-13 04:53:20,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-13 04:53:20,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:20,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-13 04:53:20,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-13 04:53:20,811 INFO L87 Difference]: Start difference. First operand 133 states and 136 transitions. Second operand 60 states. [2020-10-13 04:53:21,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:21,317 INFO L93 Difference]: Finished difference Result 150 states and 156 transitions. [2020-10-13 04:53:21,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-13 04:53:21,318 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 128 [2020-10-13 04:53:21,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:21,319 INFO L225 Difference]: With dead ends: 150 [2020-10-13 04:53:21,320 INFO L226 Difference]: Without dead ends: 136 [2020-10-13 04:53:21,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-13 04:53:21,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-13 04:53:21,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2020-10-13 04:53:21,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-13 04:53:21,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 138 transitions. [2020-10-13 04:53:21,325 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 138 transitions. Word has length 128 [2020-10-13 04:53:21,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:21,325 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 138 transitions. [2020-10-13 04:53:21,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-13 04:53:21,325 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 138 transitions. [2020-10-13 04:53:21,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-13 04:53:21,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:21,326 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:21,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-13 04:53:21,327 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:21,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:21,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1214188384, now seen corresponding path program 57 times [2020-10-13 04:53:21,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:21,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022550110] [2020-10-13 04:53:21,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:21,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:21,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:21,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:26,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:26,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-13 04:53:26,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:53:26,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-13 04:53:26,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:26,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-13 04:53:26,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:53:26,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-13 04:53:26,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:28,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:28,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:28,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:28,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:28,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:28,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:28,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:53:28,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:28,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:28,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:28,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:28,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:28,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:53:28,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022550110] [2020-10-13 04:53:28,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:28,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-13 04:53:28,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008635004] [2020-10-13 04:53:28,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-13 04:53:28,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:28,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-13 04:53:28,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-13 04:53:28,584 INFO L87 Difference]: Start difference. First operand 135 states and 138 transitions. Second operand 61 states. [2020-10-13 04:53:29,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:29,049 INFO L93 Difference]: Finished difference Result 152 states and 158 transitions. [2020-10-13 04:53:29,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-13 04:53:29,050 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 130 [2020-10-13 04:53:29,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:29,051 INFO L225 Difference]: With dead ends: 152 [2020-10-13 04:53:29,052 INFO L226 Difference]: Without dead ends: 138 [2020-10-13 04:53:29,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-13 04:53:29,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-13 04:53:29,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2020-10-13 04:53:29,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-13 04:53:29,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 140 transitions. [2020-10-13 04:53:29,056 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 140 transitions. Word has length 130 [2020-10-13 04:53:29,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:29,056 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 140 transitions. [2020-10-13 04:53:29,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-13 04:53:29,057 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 140 transitions. [2020-10-13 04:53:29,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-13 04:53:29,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:29,057 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:29,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-13 04:53:29,057 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:29,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:29,058 INFO L82 PathProgramCache]: Analyzing trace with hash 461585794, now seen corresponding path program 58 times [2020-10-13 04:53:29,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:29,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969396205] [2020-10-13 04:53:29,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:29,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:29,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:29,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:34,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:34,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-13 04:53:34,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:53:34,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-13 04:53:34,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:34,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-13 04:53:34,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:53:34,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-13 04:53:34,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:36,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:36,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:36,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:36,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:36,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:36,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:36,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:53:36,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:36,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:36,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:36,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:36,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:36,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:53:36,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969396205] [2020-10-13 04:53:36,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:36,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-13 04:53:36,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308171490] [2020-10-13 04:53:36,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-13 04:53:36,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:36,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-13 04:53:36,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-13 04:53:36,419 INFO L87 Difference]: Start difference. First operand 137 states and 140 transitions. Second operand 62 states. [2020-10-13 04:53:36,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:36,756 INFO L93 Difference]: Finished difference Result 154 states and 160 transitions. [2020-10-13 04:53:36,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-13 04:53:36,756 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 132 [2020-10-13 04:53:36,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:36,758 INFO L225 Difference]: With dead ends: 154 [2020-10-13 04:53:36,758 INFO L226 Difference]: Without dead ends: 140 [2020-10-13 04:53:36,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-13 04:53:36,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-13 04:53:36,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2020-10-13 04:53:36,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-13 04:53:36,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 142 transitions. [2020-10-13 04:53:36,764 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 142 transitions. Word has length 132 [2020-10-13 04:53:36,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:36,764 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 142 transitions. [2020-10-13 04:53:36,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-13 04:53:36,764 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 142 transitions. [2020-10-13 04:53:36,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-13 04:53:36,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:36,765 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:36,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-13 04:53:36,765 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:36,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:36,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1234997468, now seen corresponding path program 59 times [2020-10-13 04:53:36,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:36,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174567340] [2020-10-13 04:53:36,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:36,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:36,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:36,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:41,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:41,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-13 04:53:41,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:53:41,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-13 04:53:41,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:41,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-13 04:53:41,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:53:41,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-13 04:53:41,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:44,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:44,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:44,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:44,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:44,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:44,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:44,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:53:44,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:44,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:44,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:44,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:44,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:44,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:53:44,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174567340] [2020-10-13 04:53:44,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:44,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-13 04:53:44,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825630070] [2020-10-13 04:53:44,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-13 04:53:44,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:44,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-13 04:53:44,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-13 04:53:44,188 INFO L87 Difference]: Start difference. First operand 139 states and 142 transitions. Second operand 63 states. [2020-10-13 04:53:44,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:44,469 INFO L93 Difference]: Finished difference Result 156 states and 162 transitions. [2020-10-13 04:53:44,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-13 04:53:44,470 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 134 [2020-10-13 04:53:44,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:44,471 INFO L225 Difference]: With dead ends: 156 [2020-10-13 04:53:44,471 INFO L226 Difference]: Without dead ends: 142 [2020-10-13 04:53:44,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-13 04:53:44,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-13 04:53:44,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2020-10-13 04:53:44,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-13 04:53:44,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 144 transitions. [2020-10-13 04:53:44,477 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 144 transitions. Word has length 134 [2020-10-13 04:53:44,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:44,477 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 144 transitions. [2020-10-13 04:53:44,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-13 04:53:44,477 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 144 transitions. [2020-10-13 04:53:44,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-13 04:53:44,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:44,478 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:44,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-13 04:53:44,479 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:44,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:44,479 INFO L82 PathProgramCache]: Analyzing trace with hash 436060230, now seen corresponding path program 60 times [2020-10-13 04:53:44,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:44,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831613677] [2020-10-13 04:53:44,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:44,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:44,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:44,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:49,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:49,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-13 04:53:49,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:53:49,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-13 04:53:49,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:49,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-13 04:53:49,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:53:49,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-13 04:53:49,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:51,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:51,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:51,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:51,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:51,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:51,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:51,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:53:51,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:51,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:51,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:51,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:51,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:51,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:53:51,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831613677] [2020-10-13 04:53:51,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:51,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-13 04:53:51,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110516206] [2020-10-13 04:53:51,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-13 04:53:51,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:51,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-13 04:53:51,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-13 04:53:51,916 INFO L87 Difference]: Start difference. First operand 141 states and 144 transitions. Second operand 64 states. [2020-10-13 04:53:52,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:52,467 INFO L93 Difference]: Finished difference Result 158 states and 164 transitions. [2020-10-13 04:53:52,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-13 04:53:52,468 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 136 [2020-10-13 04:53:52,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:52,469 INFO L225 Difference]: With dead ends: 158 [2020-10-13 04:53:52,469 INFO L226 Difference]: Without dead ends: 144 [2020-10-13 04:53:52,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-13 04:53:52,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-13 04:53:52,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2020-10-13 04:53:52,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-13 04:53:52,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 146 transitions. [2020-10-13 04:53:52,474 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 146 transitions. Word has length 136 [2020-10-13 04:53:52,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:52,474 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 146 transitions. [2020-10-13 04:53:52,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-13 04:53:52,475 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 146 transitions. [2020-10-13 04:53:52,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-13 04:53:52,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:52,475 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:52,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-13 04:53:52,476 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:52,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:52,476 INFO L82 PathProgramCache]: Analyzing trace with hash 4739304, now seen corresponding path program 61 times [2020-10-13 04:53:52,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:52,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467120737] [2020-10-13 04:53:52,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:52,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:52,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:57,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:57,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-13 04:53:57,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:53:57,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-13 04:53:57,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:57,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-13 04:53:57,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:53:57,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-13 04:53:57,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:00,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:00,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:00,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:00,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:00,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:00,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:00,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:00,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:00,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:00,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:00,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:00,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:00,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:54:00,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467120737] [2020-10-13 04:54:00,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:00,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-13 04:54:00,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099521645] [2020-10-13 04:54:00,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-13 04:54:00,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:00,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-13 04:54:00,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-13 04:54:00,097 INFO L87 Difference]: Start difference. First operand 143 states and 146 transitions. Second operand 65 states. [2020-10-13 04:54:00,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:00,651 INFO L93 Difference]: Finished difference Result 160 states and 166 transitions. [2020-10-13 04:54:00,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-13 04:54:00,652 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 138 [2020-10-13 04:54:00,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:00,654 INFO L225 Difference]: With dead ends: 160 [2020-10-13 04:54:00,654 INFO L226 Difference]: Without dead ends: 146 [2020-10-13 04:54:00,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-13 04:54:00,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-13 04:54:00,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2020-10-13 04:54:00,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-13 04:54:00,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 148 transitions. [2020-10-13 04:54:00,658 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 148 transitions. Word has length 138 [2020-10-13 04:54:00,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:00,658 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 148 transitions. [2020-10-13 04:54:00,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-13 04:54:00,659 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 148 transitions. [2020-10-13 04:54:00,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-13 04:54:00,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:00,660 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:00,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-13 04:54:00,660 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:00,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:00,660 INFO L82 PathProgramCache]: Analyzing trace with hash 2117157130, now seen corresponding path program 62 times [2020-10-13 04:54:00,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:00,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859788374] [2020-10-13 04:54:00,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:00,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:00,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:00,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:05,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:05,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-13 04:54:05,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:54:05,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-13 04:54:05,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:05,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-13 04:54:05,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:54:05,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-13 04:54:05,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:08,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:08,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:08,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:08,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:08,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:08,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:08,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:08,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:08,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:08,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:08,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:08,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:08,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:54:08,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859788374] [2020-10-13 04:54:08,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:08,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-13 04:54:08,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700667849] [2020-10-13 04:54:08,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-13 04:54:08,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:08,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-13 04:54:08,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-10-13 04:54:08,345 INFO L87 Difference]: Start difference. First operand 145 states and 148 transitions. Second operand 66 states. [2020-10-13 04:54:08,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:08,641 INFO L93 Difference]: Finished difference Result 162 states and 168 transitions. [2020-10-13 04:54:08,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-13 04:54:08,642 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 140 [2020-10-13 04:54:08,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:08,643 INFO L225 Difference]: With dead ends: 162 [2020-10-13 04:54:08,643 INFO L226 Difference]: Without dead ends: 148 [2020-10-13 04:54:08,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-10-13 04:54:08,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-13 04:54:08,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2020-10-13 04:54:08,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-13 04:54:08,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 150 transitions. [2020-10-13 04:54:08,652 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 150 transitions. Word has length 140 [2020-10-13 04:54:08,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:08,652 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 150 transitions. [2020-10-13 04:54:08,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-13 04:54:08,653 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 150 transitions. [2020-10-13 04:54:08,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-13 04:54:08,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:08,654 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:08,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-13 04:54:08,654 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:08,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:08,655 INFO L82 PathProgramCache]: Analyzing trace with hash 631156908, now seen corresponding path program 63 times [2020-10-13 04:54:08,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:08,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341298973] [2020-10-13 04:54:08,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:08,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:08,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:08,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking...