/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=SHALLOWEST --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 language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 04:50:27,784 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 04:50:27,786 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 04:50:27,831 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 04:50:27,832 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 04:50:27,833 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 04:50:27,835 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 04:50:27,837 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 04:50:27,840 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 04:50:27,841 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 04:50:27,842 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 04:50:27,844 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 04:50:27,844 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 04:50:27,846 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 04:50:27,847 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 04:50:27,848 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 04:50:27,849 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 04:50:27,851 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 04:50:27,853 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 04:50:27,874 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 04:50:27,879 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 04:50:27,889 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 04:50:27,891 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 04:50:27,892 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 04:50:27,900 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 04:50:27,900 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 04:50:27,901 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 04:50:27,902 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 04:50:27,906 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 04:50:27,908 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 04:50:27,908 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 04:50:27,909 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 04:50:27,910 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 04:50:27,911 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 04:50:27,912 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 04:50:27,912 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 04:50:27,913 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 04:50:27,914 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 04:50:27,914 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 04:50:27,915 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 04:50:27,916 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 04:50:27,919 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 [2020-10-27 04:50:27,968 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 04:50:27,968 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 04:50:27,973 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 04:50:27,973 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 04:50:27,973 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 04:50:27,973 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 04:50:27,974 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 04:50:27,974 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 04:50:27,974 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 04:50:27,974 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 04:50:27,975 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 04:50:27,976 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 04:50:27,976 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 04:50:27,976 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 04:50:27,976 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 04:50:27,976 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 04:50:27,977 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 04:50:27,977 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 04:50:27,977 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 04:50:27,977 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 04:50:27,978 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 04:50:27,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 04:50:27,978 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 04:50:27,978 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 04:50:27,979 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 04:50:27,979 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 04:50:27,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 04:50:27,979 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 04:50:27,979 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 04:50:27,980 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 04:50:28,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 04:50:28,421 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 04:50:28,425 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 04:50:28,426 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 04:50:28,427 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 04:50:28,428 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-27 04:50:28,524 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8e19c3d7/c9b5f1ebb51c4360a801d3192725bf53/FLAG64a49fa02 [2020-10-27 04:50:29,267 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 04:50:29,268 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-27 04:50:29,287 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8e19c3d7/c9b5f1ebb51c4360a801d3192725bf53/FLAG64a49fa02 [2020-10-27 04:50:29,559 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8e19c3d7/c9b5f1ebb51c4360a801d3192725bf53 [2020-10-27 04:50:29,562 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 04:50:29,569 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 04:50:29,572 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 04:50:29,572 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 04:50:29,580 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 04:50:29,581 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:50:29" (1/1) ... [2020-10-27 04:50:29,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25876592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:50:29, skipping insertion in model container [2020-10-27 04:50:29,586 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:50:29" (1/1) ... [2020-10-27 04:50:29,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 04:50:29,662 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 04:50:29,932 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 04:50:29,950 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 04:50:30,056 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 04:50:30,138 INFO L208 MainTranslator]: Completed translation [2020-10-27 04:50:30,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:50:30 WrapperNode [2020-10-27 04:50:30,139 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 04:50:30,140 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 04:50:30,141 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 04:50:30,141 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 04:50:30,156 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:50:30" (1/1) ... [2020-10-27 04:50:30,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:50:30" (1/1) ... [2020-10-27 04:50:30,171 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:50:30" (1/1) ... [2020-10-27 04:50:30,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:50:30" (1/1) ... [2020-10-27 04:50:30,189 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:50:30" (1/1) ... [2020-10-27 04:50:30,200 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:50:30" (1/1) ... [2020-10-27 04:50:30,205 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:50:30" (1/1) ... [2020-10-27 04:50:30,212 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 04:50:30,213 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 04:50:30,213 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 04:50:30,213 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 04:50:30,214 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:50:30" (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 [2020-10-27 04:50:30,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 04:50:30,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 04:50:30,333 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 04:50:30,334 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 04:50:30,334 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 04:50:30,335 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 04:50:30,335 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 04:50:30,335 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 04:50:30,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 04:50:30,335 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 04:50:30,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 04:50:30,337 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 04:50:30,337 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 04:50:30,337 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 04:50:30,337 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 04:50:30,339 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 04:50:30,339 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 04:50:30,339 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 04:50:30,339 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 04:50:30,339 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 04:50:30,339 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 04:50:30,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 04:50:30,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 04:50:30,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 04:50:30,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 04:50:30,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 04:50:30,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 04:50:31,424 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 04:50:31,425 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 04:50:31,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:50:31 BoogieIcfgContainer [2020-10-27 04:50:31,427 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 04:50:31,429 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 04:50:31,429 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 04:50:31,433 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 04:50:31,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 04:50:29" (1/3) ... [2020-10-27 04:50:31,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d5ea48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:50:31, skipping insertion in model container [2020-10-27 04:50:31,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:50:30" (2/3) ... [2020-10-27 04:50:31,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d5ea48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:50:31, skipping insertion in model container [2020-10-27 04:50:31,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:50:31" (3/3) ... [2020-10-27 04:50:31,437 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-27 04:50:31,451 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 04:50:31,456 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 04:50:31,470 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 04:50:31,502 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 04:50:31,502 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 04:50:31,502 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 04:50:31,502 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 04:50:31,503 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 04:50:31,503 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 04:50:31,503 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 04:50:31,503 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 04:50:31,528 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states. [2020-10-27 04:50:31,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 04:50:31,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:50:31,541 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:50:31,542 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:50:31,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:50:31,549 INFO L82 PathProgramCache]: Analyzing trace with hash -720370719, now seen corresponding path program 1 times [2020-10-27 04:50:31,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:50:31,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677500365] [2020-10-27 04:50:31,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:50:31,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:50:32,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:50:32,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:50:32,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:50:32,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:50:35,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:50:35,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 04:50:35,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 04:50:35,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3709 [2020-10-27 04:50:35,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:50:35,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 04:50:35,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 04:50:35,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 04:50:35,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 04:50:36,269 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 04:50:36,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:50:36,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:50:36,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:50:36,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:50:36,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:50:36,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:50:36,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 04:50:36,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:50:36,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:50:36,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:50:36,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:50:36,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 04:50:36,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 04:50:36,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677500365] [2020-10-27 04:50:36,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:50:36,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 04:50:36,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090277220] [2020-10-27 04:50:36,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 04:50:36,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:50:36,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 04:50:36,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 04:50:36,395 INFO L87 Difference]: Start difference. First operand 138 states. Second operand 4 states. [2020-10-27 04:50:36,920 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 04:50:38,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:50:38,060 INFO L93 Difference]: Finished difference Result 295 states and 494 transitions. [2020-10-27 04:50:38,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 04:50:38,063 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-10-27 04:50:38,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:50:38,075 INFO L225 Difference]: With dead ends: 295 [2020-10-27 04:50:38,076 INFO L226 Difference]: Without dead ends: 201 [2020-10-27 04:50:38,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:50:38,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-27 04:50:38,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2020-10-27 04:50:38,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-27 04:50:38,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 312 transitions. [2020-10-27 04:50:38,148 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 312 transitions. Word has length 56 [2020-10-27 04:50:38,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:50:38,148 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 312 transitions. [2020-10-27 04:50:38,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 04:50:38,149 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 312 transitions. [2020-10-27 04:50:38,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 04:50:38,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:50:38,153 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:50:38,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 04:50:38,154 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:50:38,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:50:38,155 INFO L82 PathProgramCache]: Analyzing trace with hash 939684029, now seen corresponding path program 1 times [2020-10-27 04:50:38,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:50:38,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019065164] [2020-10-27 04:50:38,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:50:38,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:50:38,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:50:38,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:50:38,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:50:38,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:50:38,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:50:39,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:50:43,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:50:43,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 04:50:43,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 04:50:43,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 04:50:43,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:50:43,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:50:43,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 04:50:43,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 04:50:43,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 04:50:43,702 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 04:50:43,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:50:43,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:50:43,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:50:43,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:50:43,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:50:43,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:50:43,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 04:50:43,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:50:43,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:50:43,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:50:43,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:50:43,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 04:50:43,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 04:50:43,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019065164] [2020-10-27 04:50:43,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:50:43,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:50:43,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569905745] [2020-10-27 04:50:43,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:50:43,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:50:43,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:50:43,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:50:43,783 INFO L87 Difference]: Start difference. First operand 198 states and 312 transitions. Second operand 5 states. [2020-10-27 04:50:44,858 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 04:50:44,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:50:44,972 INFO L93 Difference]: Finished difference Result 542 states and 854 transitions. [2020-10-27 04:50:44,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 04:50:44,975 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2020-10-27 04:50:44,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:50:44,983 INFO L225 Difference]: With dead ends: 542 [2020-10-27 04:50:44,983 INFO L226 Difference]: Without dead ends: 367 [2020-10-27 04:50:44,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 04:50:44,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-10-27 04:50:45,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 364. [2020-10-27 04:50:45,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2020-10-27 04:50:45,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 571 transitions. [2020-10-27 04:50:45,070 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 571 transitions. Word has length 58 [2020-10-27 04:50:45,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:50:45,070 INFO L481 AbstractCegarLoop]: Abstraction has 364 states and 571 transitions. [2020-10-27 04:50:45,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 04:50:45,071 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 571 transitions. [2020-10-27 04:50:45,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 04:50:45,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:50:45,075 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:50:45,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 04:50:45,075 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:50:45,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:50:45,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1310082284, now seen corresponding path program 1 times [2020-10-27 04:50:45,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:50:45,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158888550] [2020-10-27 04:50:45,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:50:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:50:45,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:50:45,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:50:45,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:50:45,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:50:45,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:50:50,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:50:50,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 04:50:50,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 04:50:50,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 04:50:50,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:50:50,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:50:50,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 04:50:50,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 04:50:50,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:50:50,468 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 04:50:50,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:50:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:50:50,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:50:50,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:50:50,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:50:50,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:50:50,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 04:50:50,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:50:50,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:50:50,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:50:50,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:50:50,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:50:50,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 04:50:50,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158888550] [2020-10-27 04:50:50,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:50:50,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:50:50,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837648376] [2020-10-27 04:50:50,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:50:50,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:50:50,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:50:50,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:50:50,522 INFO L87 Difference]: Start difference. First operand 364 states and 571 transitions. Second operand 5 states. [2020-10-27 04:50:51,735 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 04:50:51,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:50:51,826 INFO L93 Difference]: Finished difference Result 1049 states and 1648 transitions. [2020-10-27 04:50:51,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 04:50:51,827 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2020-10-27 04:50:51,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:50:51,832 INFO L225 Difference]: With dead ends: 1049 [2020-10-27 04:50:51,833 INFO L226 Difference]: Without dead ends: 698 [2020-10-27 04:50:51,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 04:50:51,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2020-10-27 04:50:51,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 695. [2020-10-27 04:50:51,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 695 states. [2020-10-27 04:50:51,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1084 transitions. [2020-10-27 04:50:51,903 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1084 transitions. Word has length 58 [2020-10-27 04:50:51,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:50:51,907 INFO L481 AbstractCegarLoop]: Abstraction has 695 states and 1084 transitions. [2020-10-27 04:50:51,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 04:50:51,907 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1084 transitions. [2020-10-27 04:50:51,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 04:50:51,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:50:51,918 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:50:51,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 04:50:51,919 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:50:51,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:50:51,925 INFO L82 PathProgramCache]: Analyzing trace with hash 969382163, now seen corresponding path program 1 times [2020-10-27 04:50:51,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:50:51,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266211406] [2020-10-27 04:50:51,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:50:51,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:50:51,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:50:52,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:50:52,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:50:52,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:50:52,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:50:55,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:50:55,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 04:50:55,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 04:50:55,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3035 [2020-10-27 04:50:55,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:50:55,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:50:55,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 04:50:55,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 04:50:55,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:50:55,385 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 04:50:55,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:50:55,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:50:55,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:50:55,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:50:55,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:50:55,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:50:55,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 04:50:55,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:50:55,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:50:55,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:50:55,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:50:55,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:50:55,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 04:50:55,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266211406] [2020-10-27 04:50:55,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:50:55,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:50:55,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582566259] [2020-10-27 04:50:55,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:50:55,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:50:55,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:50:55,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:50:55,454 INFO L87 Difference]: Start difference. First operand 695 states and 1084 transitions. Second operand 5 states. [2020-10-27 04:50:56,649 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 04:50:56,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:50:56,760 INFO L93 Difference]: Finished difference Result 1993 states and 3107 transitions. [2020-10-27 04:50:56,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 04:50:56,761 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 59 [2020-10-27 04:50:56,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:50:56,769 INFO L225 Difference]: With dead ends: 1993 [2020-10-27 04:50:56,769 INFO L226 Difference]: Without dead ends: 1338 [2020-10-27 04:50:56,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 04:50:56,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2020-10-27 04:50:56,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 1335. [2020-10-27 04:50:56,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1335 states. [2020-10-27 04:50:56,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 2066 transitions. [2020-10-27 04:50:56,890 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 2066 transitions. Word has length 59 [2020-10-27 04:50:56,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:50:56,891 INFO L481 AbstractCegarLoop]: Abstraction has 1335 states and 2066 transitions. [2020-10-27 04:50:56,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 04:50:56,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 2066 transitions. [2020-10-27 04:50:56,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 04:50:56,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:50:56,895 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:50:56,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 04:50:56,896 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:50:56,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:50:56,896 INFO L82 PathProgramCache]: Analyzing trace with hash -527051635, now seen corresponding path program 1 times [2020-10-27 04:50:56,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:50:56,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990642384] [2020-10-27 04:50:56,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:50:56,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:50:56,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:50:56,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:50:57,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:50:57,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:50:57,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:01,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:51:01,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 04:51:01,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 04:51:01,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4701 [2020-10-27 04:51:01,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:51:01,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:51:01,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 04:51:01,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 04:51:01,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:51:02,084 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 04:51:02,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:51:02,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:51:02,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:02,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:51:02,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:51:02,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:51:02,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-27 04:51:02,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:51:02,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:51:02,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:51:02,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:51:02,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:51:02,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 04:51:02,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990642384] [2020-10-27 04:51:02,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:51:02,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:51:02,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875998102] [2020-10-27 04:51:02,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:51:02,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:51:02,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:51:02,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:51:02,174 INFO L87 Difference]: Start difference. First operand 1335 states and 2066 transitions. Second operand 5 states. [2020-10-27 04:51:03,363 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 04:51:03,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:51:03,512 INFO L93 Difference]: Finished difference Result 3773 states and 5834 transitions. [2020-10-27 04:51:03,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 04:51:03,513 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 59 [2020-10-27 04:51:03,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:51:03,526 INFO L225 Difference]: With dead ends: 3773 [2020-10-27 04:51:03,526 INFO L226 Difference]: Without dead ends: 2542 [2020-10-27 04:51:03,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 04:51:03,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2020-10-27 04:51:03,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 2539. [2020-10-27 04:51:03,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2539 states. [2020-10-27 04:51:03,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2539 states to 2539 states and 3900 transitions. [2020-10-27 04:51:03,767 INFO L78 Accepts]: Start accepts. Automaton has 2539 states and 3900 transitions. Word has length 59 [2020-10-27 04:51:03,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:51:03,767 INFO L481 AbstractCegarLoop]: Abstraction has 2539 states and 3900 transitions. [2020-10-27 04:51:03,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 04:51:03,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2539 states and 3900 transitions. [2020-10-27 04:51:03,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 04:51:03,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:51:03,774 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:51:03,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 04:51:03,774 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:51:03,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:51:03,775 INFO L82 PathProgramCache]: Analyzing trace with hash 634723445, now seen corresponding path program 1 times [2020-10-27 04:51:03,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:51:03,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743104403] [2020-10-27 04:51:03,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:51:03,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:51:03,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:03,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:03,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:04,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:51:04,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 04:51:04,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 04:51:04,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 656 [2020-10-27 04:51:04,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:51:04,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 04:51:04,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 04:51:04,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 04:51:04,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:51:04,792 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 04:51:04,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:51:04,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:51:04,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:04,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:51:04,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:51:04,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:51:04,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 04:51:04,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:51:04,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:51:04,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:51:04,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:51:04,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:51:04,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 04:51:04,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743104403] [2020-10-27 04:51:04,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:51:04,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 04:51:04,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291870086] [2020-10-27 04:51:04,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 04:51:04,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:51:04,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 04:51:04,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 04:51:04,837 INFO L87 Difference]: Start difference. First operand 2539 states and 3900 transitions. Second operand 4 states. [2020-10-27 04:51:05,147 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 04:51:06,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:51:06,292 INFO L93 Difference]: Finished difference Result 6305 states and 10032 transitions. [2020-10-27 04:51:06,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 04:51:06,293 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-10-27 04:51:06,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:51:06,322 INFO L225 Difference]: With dead ends: 6305 [2020-10-27 04:51:06,322 INFO L226 Difference]: Without dead ends: 4318 [2020-10-27 04:51:06,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:51:06,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4318 states. [2020-10-27 04:51:06,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4318 to 4315. [2020-10-27 04:51:06,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4315 states. [2020-10-27 04:51:06,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4315 states to 4315 states and 6748 transitions. [2020-10-27 04:51:06,753 INFO L78 Accepts]: Start accepts. Automaton has 4315 states and 6748 transitions. Word has length 60 [2020-10-27 04:51:06,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:51:06,753 INFO L481 AbstractCegarLoop]: Abstraction has 4315 states and 6748 transitions. [2020-10-27 04:51:06,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 04:51:06,753 INFO L276 IsEmpty]: Start isEmpty. Operand 4315 states and 6748 transitions. [2020-10-27 04:51:06,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 04:51:06,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:51:06,761 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:51:06,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 04:51:06,761 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:51:06,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:51:06,762 INFO L82 PathProgramCache]: Analyzing trace with hash 76372525, now seen corresponding path program 1 times [2020-10-27 04:51:06,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:51:06,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427310020] [2020-10-27 04:51:06,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:51:06,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:51:06,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:06,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:06,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:07,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:07,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:51:07,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 04:51:07,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 04:51:07,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1075 [2020-10-27 04:51:07,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:51:07,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:51:07,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 04:51:07,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 04:51:07,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:51:08,252 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 04:51:08,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:51:08,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:51:08,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:08,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:51:08,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:51:08,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:51:08,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 04:51:08,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:51:08,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:51:08,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:51:08,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:51:08,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:51:08,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 04:51:08,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427310020] [2020-10-27 04:51:08,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:51:08,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:51:08,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591657709] [2020-10-27 04:51:08,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:51:08,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:51:08,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:51:08,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:51:08,300 INFO L87 Difference]: Start difference. First operand 4315 states and 6748 transitions. Second operand 5 states. [2020-10-27 04:51:09,881 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 04:51:10,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:51:10,224 INFO L93 Difference]: Finished difference Result 12019 states and 19015 transitions. [2020-10-27 04:51:10,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 04:51:10,225 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-10-27 04:51:10,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:51:10,267 INFO L225 Difference]: With dead ends: 12019 [2020-10-27 04:51:10,267 INFO L226 Difference]: Without dead ends: 8256 [2020-10-27 04:51:10,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 04:51:10,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8256 states. [2020-10-27 04:51:11,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8256 to 8253. [2020-10-27 04:51:11,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8253 states. [2020-10-27 04:51:11,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8253 states to 8253 states and 12819 transitions. [2020-10-27 04:51:11,219 INFO L78 Accepts]: Start accepts. Automaton has 8253 states and 12819 transitions. Word has length 62 [2020-10-27 04:51:11,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:51:11,220 INFO L481 AbstractCegarLoop]: Abstraction has 8253 states and 12819 transitions. [2020-10-27 04:51:11,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 04:51:11,220 INFO L276 IsEmpty]: Start isEmpty. Operand 8253 states and 12819 transitions. [2020-10-27 04:51:11,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 04:51:11,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:51:11,232 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:51:11,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 04:51:11,233 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:51:11,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:51:11,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1368239257, now seen corresponding path program 1 times [2020-10-27 04:51:11,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:51:11,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626937580] [2020-10-27 04:51:11,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:51:11,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:51:11,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:11,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:11,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:11,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:11,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:12,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:51:12,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 04:51:12,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 04:51:12,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1381 [2020-10-27 04:51:12,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:51:12,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:51:12,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 04:51:12,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 04:51:12,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:51:13,005 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 04:51:13,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:51:13,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:51:13,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:13,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:51:13,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:51:13,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:51:13,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 04:51:13,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:51:13,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:51:13,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:51:13,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:51:13,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:51:13,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 04:51:13,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626937580] [2020-10-27 04:51:13,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:51:13,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:51:13,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084046444] [2020-10-27 04:51:13,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:51:13,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:51:13,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:51:13,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:51:13,093 INFO L87 Difference]: Start difference. First operand 8253 states and 12819 transitions. Second operand 5 states. [2020-10-27 04:51:15,017 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 04:51:16,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:51:16,003 INFO L93 Difference]: Finished difference Result 23005 states and 36123 transitions. [2020-10-27 04:51:16,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 04:51:16,004 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-10-27 04:51:16,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:51:16,062 INFO L225 Difference]: With dead ends: 23005 [2020-10-27 04:51:16,062 INFO L226 Difference]: Without dead ends: 15770 [2020-10-27 04:51:16,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 04:51:16,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15770 states. [2020-10-27 04:51:17,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15770 to 15767. [2020-10-27 04:51:17,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15767 states. [2020-10-27 04:51:17,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15767 states to 15767 states and 24215 transitions. [2020-10-27 04:51:17,489 INFO L78 Accepts]: Start accepts. Automaton has 15767 states and 24215 transitions. Word has length 62 [2020-10-27 04:51:17,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:51:17,489 INFO L481 AbstractCegarLoop]: Abstraction has 15767 states and 24215 transitions. [2020-10-27 04:51:17,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 04:51:17,490 INFO L276 IsEmpty]: Start isEmpty. Operand 15767 states and 24215 transitions. [2020-10-27 04:51:17,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 04:51:17,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:51:17,512 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:51:17,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 04:51:17,512 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:51:17,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:51:17,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1549911721, now seen corresponding path program 1 times [2020-10-27 04:51:17,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:51:17,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006666058] [2020-10-27 04:51:17,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:51:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:51:17,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:17,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:17,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:18,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:51:18,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 04:51:18,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 04:51:18,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 551 [2020-10-27 04:51:18,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:51:18,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 04:51:18,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-27 04:51:18,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 04:51:18,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:51:18,414 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 04:51:18,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:51:18,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:51:18,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:18,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:51:18,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:51:18,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:51:18,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 04:51:18,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:51:18,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:51:18,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:51:18,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:51:18,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:51:18,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 04:51:18,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006666058] [2020-10-27 04:51:18,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:51:18,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 04:51:18,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945403129] [2020-10-27 04:51:18,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 04:51:18,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:51:18,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 04:51:18,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 04:51:18,523 INFO L87 Difference]: Start difference. First operand 15767 states and 24215 transitions. Second operand 4 states. [2020-10-27 04:51:18,842 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 04:51:22,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:51:22,063 INFO L93 Difference]: Finished difference Result 41885 states and 65691 transitions. [2020-10-27 04:51:22,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 04:51:22,063 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-10-27 04:51:22,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:51:22,138 INFO L225 Difference]: With dead ends: 41885 [2020-10-27 04:51:22,139 INFO L226 Difference]: Without dead ends: 28058 [2020-10-27 04:51:22,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:51:22,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28058 states. [2020-10-27 04:51:25,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28058 to 28055. [2020-10-27 04:51:25,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28055 states. [2020-10-27 04:51:25,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28055 states to 28055 states and 43415 transitions. [2020-10-27 04:51:25,202 INFO L78 Accepts]: Start accepts. Automaton has 28055 states and 43415 transitions. Word has length 63 [2020-10-27 04:51:25,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:51:25,203 INFO L481 AbstractCegarLoop]: Abstraction has 28055 states and 43415 transitions. [2020-10-27 04:51:25,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 04:51:25,203 INFO L276 IsEmpty]: Start isEmpty. Operand 28055 states and 43415 transitions. [2020-10-27 04:51:25,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 04:51:25,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:51:25,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:51:25,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 04:51:25,224 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:51:25,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:51:25,224 INFO L82 PathProgramCache]: Analyzing trace with hash 684541211, now seen corresponding path program 1 times [2020-10-27 04:51:25,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:51:25,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952871280] [2020-10-27 04:51:25,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:51:25,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:51:25,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:25,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:25,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:25,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:26,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:51:26,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 04:51:26,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 04:51:26,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1286 [2020-10-27 04:51:26,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:51:26,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 04:51:26,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 04:51:26,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 04:51:26,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:51:26,901 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 04:51:26,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:51:26,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:51:26,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:26,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:51:26,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:51:26,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:51:26,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 04:51:26,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:51:26,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:51:26,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:51:26,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:51:26,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:51:26,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 04:51:26,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952871280] [2020-10-27 04:51:26,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:51:26,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 04:51:26,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130780656] [2020-10-27 04:51:26,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 04:51:26,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:51:26,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 04:51:26,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 04:51:26,950 INFO L87 Difference]: Start difference. First operand 28055 states and 43415 transitions. Second operand 4 states. [2020-10-27 04:51:31,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:51:31,850 INFO L93 Difference]: Finished difference Result 56907 states and 87788 transitions. [2020-10-27 04:51:31,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 04:51:31,851 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-27 04:51:31,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:51:31,967 INFO L225 Difference]: With dead ends: 56907 [2020-10-27 04:51:31,967 INFO L226 Difference]: Without dead ends: 42637 [2020-10-27 04:51:31,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 04:51:32,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42637 states. [2020-10-27 04:51:35,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42637 to 28055. [2020-10-27 04:51:35,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28055 states. [2020-10-27 04:51:35,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28055 states to 28055 states and 43414 transitions. [2020-10-27 04:51:35,065 INFO L78 Accepts]: Start accepts. Automaton has 28055 states and 43414 transitions. Word has length 66 [2020-10-27 04:51:35,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:51:35,065 INFO L481 AbstractCegarLoop]: Abstraction has 28055 states and 43414 transitions. [2020-10-27 04:51:35,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 04:51:35,066 INFO L276 IsEmpty]: Start isEmpty. Operand 28055 states and 43414 transitions. [2020-10-27 04:51:35,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 04:51:35,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:51:35,085 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:51:35,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 04:51:35,086 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:51:35,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:51:35,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1688126659, now seen corresponding path program 1 times [2020-10-27 04:51:35,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:51:35,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685675623] [2020-10-27 04:51:35,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:51:35,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:51:35,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:35,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:35,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:35,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:36,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:51:36,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 04:51:36,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 04:51:36,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1082 [2020-10-27 04:51:36,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:51:36,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 04:51:36,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 04:51:36,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 04:51:36,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:51:36,494 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 04:51:36,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:51:36,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:51:36,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:36,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:51:36,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:51:36,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:51:36,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 04:51:36,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:51:36,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:51:36,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:51:36,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:51:36,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:51:36,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 04:51:36,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685675623] [2020-10-27 04:51:36,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:51:36,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 04:51:36,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921632042] [2020-10-27 04:51:36,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 04:51:36,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:51:36,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 04:51:36,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 04:51:36,524 INFO L87 Difference]: Start difference. First operand 28055 states and 43414 transitions. Second operand 4 states. [2020-10-27 04:51:40,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:51:40,904 INFO L93 Difference]: Finished difference Result 56383 states and 87176 transitions. [2020-10-27 04:51:40,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 04:51:40,905 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-27 04:51:40,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:51:40,979 INFO L225 Difference]: With dead ends: 56383 [2020-10-27 04:51:40,980 INFO L226 Difference]: Without dead ends: 42088 [2020-10-27 04:51:41,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 04:51:41,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42088 states. [2020-10-27 04:51:44,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42088 to 28055. [2020-10-27 04:51:44,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28055 states. [2020-10-27 04:51:44,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28055 states to 28055 states and 43405 transitions. [2020-10-27 04:51:44,530 INFO L78 Accepts]: Start accepts. Automaton has 28055 states and 43405 transitions. Word has length 66 [2020-10-27 04:51:44,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:51:44,530 INFO L481 AbstractCegarLoop]: Abstraction has 28055 states and 43405 transitions. [2020-10-27 04:51:44,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 04:51:44,530 INFO L276 IsEmpty]: Start isEmpty. Operand 28055 states and 43405 transitions. [2020-10-27 04:51:44,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 04:51:44,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:51:44,543 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:51:44,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 04:51:44,543 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:51:44,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:51:44,543 INFO L82 PathProgramCache]: Analyzing trace with hash -957384959, now seen corresponding path program 1 times [2020-10-27 04:51:44,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:51:44,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239995857] [2020-10-27 04:51:44,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:51:44,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:51:44,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:44,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:44,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:45,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:47,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:51:47,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 04:51:47,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 04:51:47,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3072 [2020-10-27 04:51:47,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:51:47,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 04:51:47,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 04:51:47,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 04:51:47,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:51:48,003 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 04:51:48,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:51:48,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:51:48,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:48,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:51:48,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:51:48,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:51:48,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 04:51:48,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:51:48,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 04:51:48,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:51:48,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 04:51:48,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:51:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 04:51:48,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239995857] [2020-10-27 04:51:48,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:51:48,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 04:51:48,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415763745] [2020-10-27 04:51:48,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 04:51:48,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:51:48,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 04:51:48,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 04:51:48,071 INFO L87 Difference]: Start difference. First operand 28055 states and 43405 transitions. Second operand 8 states. [2020-10-27 04:51:48,518 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 04:51:50,327 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-10-27 04:51:54,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:51:54,477 INFO L93 Difference]: Finished difference Result 63901 states and 99009 transitions. [2020-10-27 04:51:54,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 04:51:54,478 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-10-27 04:51:54,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:51:54,549 INFO L225 Difference]: With dead ends: 63901 [2020-10-27 04:51:54,549 INFO L226 Difference]: Without dead ends: 42074 [2020-10-27 04:51:54,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-27 04:51:54,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42074 states. [2020-10-27 04:51:58,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42074 to 32023. [2020-10-27 04:51:58,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32023 states. [2020-10-27 04:51:58,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32023 states to 32023 states and 49037 transitions. [2020-10-27 04:51:58,254 INFO L78 Accepts]: Start accepts. Automaton has 32023 states and 49037 transitions. Word has length 66 [2020-10-27 04:51:58,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:51:58,255 INFO L481 AbstractCegarLoop]: Abstraction has 32023 states and 49037 transitions. [2020-10-27 04:51:58,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 04:51:58,255 INFO L276 IsEmpty]: Start isEmpty. Operand 32023 states and 49037 transitions. [2020-10-27 04:51:58,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 04:51:58,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:51:58,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:51:58,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 04:51:58,267 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:51:58,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:51:58,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1099587751, now seen corresponding path program 1 times [2020-10-27 04:51:58,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:51:58,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315811603] [2020-10-27 04:51:58,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:51:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:51:58,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:58,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:58,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:59,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:51:59,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 04:51:59,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 04:51:59,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 790 [2020-10-27 04:51:59,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:51:59,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 04:51:59,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-27 04:51:59,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 04:51:59,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:51:59,419 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 04:51:59,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:51:59,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:51:59,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:59,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:51:59,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:51:59,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:51:59,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 04:51:59,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:51:59,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:51:59,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:51:59,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:51:59,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:51:59,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 04:51:59,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315811603] [2020-10-27 04:51:59,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:51:59,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 04:51:59,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545962727] [2020-10-27 04:51:59,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 04:51:59,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:51:59,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 04:51:59,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 04:51:59,458 INFO L87 Difference]: Start difference. First operand 32023 states and 49037 transitions. Second operand 6 states. [2020-10-27 04:51:59,810 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 04:52:02,433 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-27 04:52:02,874 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 04:52:05,453 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-27 04:52:05,795 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 04:52:12,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:52:12,691 INFO L93 Difference]: Finished difference Result 128937 states and 202649 transitions. [2020-10-27 04:52:12,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 04:52:12,691 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-27 04:52:12,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:52:13,053 INFO L225 Difference]: With dead ends: 128937 [2020-10-27 04:52:13,053 INFO L226 Difference]: Without dead ends: 102822 [2020-10-27 04:52:13,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 04:52:13,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102822 states. [2020-10-27 04:52:20,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102822 to 56599. [2020-10-27 04:52:20,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56599 states. [2020-10-27 04:52:20,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56599 states to 56599 states and 87085 transitions. [2020-10-27 04:52:20,252 INFO L78 Accepts]: Start accepts. Automaton has 56599 states and 87085 transitions. Word has length 66 [2020-10-27 04:52:20,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:52:20,252 INFO L481 AbstractCegarLoop]: Abstraction has 56599 states and 87085 transitions. [2020-10-27 04:52:20,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 04:52:20,252 INFO L276 IsEmpty]: Start isEmpty. Operand 56599 states and 87085 transitions. [2020-10-27 04:52:20,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 04:52:20,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:52:20,274 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:52:20,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 04:52:20,274 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:52:20,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:52:20,275 INFO L82 PathProgramCache]: Analyzing trace with hash -505034117, now seen corresponding path program 1 times [2020-10-27 04:52:20,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:52:20,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288791827] [2020-10-27 04:52:20,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:52:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:52:20,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:20,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:20,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:20,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:21,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:52:21,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 04:52:21,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 04:52:21,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1180 [2020-10-27 04:52:21,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:52:21,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:52:21,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-27 04:52:21,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 04:52:21,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:52:21,915 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 04:52:21,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:52:21,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:52:21,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:21,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:52:21,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:52:21,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:52:21,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 04:52:21,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:52:21,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:52:21,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:52:21,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:52:21,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:52:21,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 04:52:21,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288791827] [2020-10-27 04:52:21,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:52:21,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:52:21,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260110452] [2020-10-27 04:52:21,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:52:21,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:52:21,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:52:21,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:52:21,950 INFO L87 Difference]: Start difference. First operand 56599 states and 87085 transitions. Second operand 5 states. [2020-10-27 04:52:22,364 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-27 04:52:25,117 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 04:52:30,831 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-27 04:52:36,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:52:36,984 INFO L93 Difference]: Finished difference Result 131360 states and 204339 transitions. [2020-10-27 04:52:36,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 04:52:36,985 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-10-27 04:52:36,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:52:37,293 INFO L225 Difference]: With dead ends: 131360 [2020-10-27 04:52:37,293 INFO L226 Difference]: Without dead ends: 104221 [2020-10-27 04:52:37,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 04:52:37,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104221 states. [2020-10-27 04:52:48,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104221 to 83223. [2020-10-27 04:52:48,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83223 states. [2020-10-27 04:52:48,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83223 states to 83223 states and 128045 transitions. [2020-10-27 04:52:48,265 INFO L78 Accepts]: Start accepts. Automaton has 83223 states and 128045 transitions. Word has length 67 [2020-10-27 04:52:48,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:52:48,265 INFO L481 AbstractCegarLoop]: Abstraction has 83223 states and 128045 transitions. [2020-10-27 04:52:48,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 04:52:48,265 INFO L276 IsEmpty]: Start isEmpty. Operand 83223 states and 128045 transitions. [2020-10-27 04:52:48,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 04:52:48,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:52:48,281 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:52:48,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 04:52:48,281 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:52:48,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:52:48,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1637710872, now seen corresponding path program 1 times [2020-10-27 04:52:48,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:52:48,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547958008] [2020-10-27 04:52:48,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:52:48,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:52:48,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:48,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:48,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:48,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:49,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:52:49,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 04:52:49,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 04:52:49,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1440 [2020-10-27 04:52:49,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:52:49,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:52:49,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-27 04:52:49,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 04:52:49,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:52:50,078 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 04:52:50,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:52:50,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:52:50,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:50,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:52:50,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:52:50,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:52:50,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 04:52:50,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:52:50,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:52:50,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:52:50,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:52:50,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:52:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 04:52:50,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547958008] [2020-10-27 04:52:50,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:52:50,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:52:50,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147182697] [2020-10-27 04:52:50,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:52:50,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:52:50,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:52:50,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:52:50,107 INFO L87 Difference]: Start difference. First operand 83223 states and 128045 transitions. Second operand 5 states. [2020-10-27 04:52:50,465 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-27 04:52:53,790 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 04:53:11,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:53:11,855 INFO L93 Difference]: Finished difference Result 240096 states and 374707 transitions. [2020-10-27 04:53:11,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 04:53:11,855 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-10-27 04:53:11,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:53:12,326 INFO L225 Difference]: With dead ends: 240096 [2020-10-27 04:53:12,326 INFO L226 Difference]: Without dead ends: 164637 [2020-10-27 04:53:12,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 04:53:12,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164637 states. [2020-10-27 04:53:28,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164637 to 123991. [2020-10-27 04:53:28,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123991 states. [2020-10-27 04:53:29,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123991 states to 123991 states and 191309 transitions. [2020-10-27 04:53:29,101 INFO L78 Accepts]: Start accepts. Automaton has 123991 states and 191309 transitions. Word has length 67 [2020-10-27 04:53:29,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:53:29,101 INFO L481 AbstractCegarLoop]: Abstraction has 123991 states and 191309 transitions. [2020-10-27 04:53:29,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 04:53:29,101 INFO L276 IsEmpty]: Start isEmpty. Operand 123991 states and 191309 transitions. [2020-10-27 04:53:29,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 04:53:29,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:53:29,121 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:53:29,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 04:53:29,121 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:53:29,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:53:29,122 INFO L82 PathProgramCache]: Analyzing trace with hash 2120093213, now seen corresponding path program 1 times [2020-10-27 04:53:29,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:53:29,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097070191] [2020-10-27 04:53:29,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:53:29,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:53:29,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:29,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:29,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:29,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:30,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:53:30,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 04:53:30,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 04:53:30,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1173 [2020-10-27 04:53:30,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:53:30,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:53:30,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 04:53:30,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 04:53:30,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:53:30,907 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 04:53:30,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:53:30,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:53:30,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:30,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:53:30,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:53:30,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:53:30,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 04:53:30,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:53:30,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:53:30,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:53:30,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:53:30,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:53:30,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 04:53:30,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097070191] [2020-10-27 04:53:30,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:53:30,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:53:30,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223669318] [2020-10-27 04:53:30,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:53:30,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:53:30,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:53:30,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:53:30,955 INFO L87 Difference]: Start difference. First operand 123991 states and 191309 transitions. Second operand 5 states. [2020-10-27 04:53:31,407 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-27 04:53:34,528 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 04:53:43,416 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-27 04:54:06,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:54:06,378 INFO L93 Difference]: Finished difference Result 300384 states and 466259 transitions. [2020-10-27 04:54:06,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 04:54:06,379 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-10-27 04:54:06,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:54:07,062 INFO L225 Difference]: With dead ends: 300384 [2020-10-27 04:54:07,062 INFO L226 Difference]: Without dead ends: 234845 [2020-10-27 04:54:07,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 04:54:07,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234845 states.