/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/locks/test_locks_15-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:28:27,790 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:28:27,794 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:28:27,838 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:28:27,839 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:28:27,840 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:28:27,842 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:28:27,844 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:28:27,857 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:28:27,859 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:28:27,860 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:28:27,861 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:28:27,861 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:28:27,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:28:27,864 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:28:27,865 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:28:27,866 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:28:27,867 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:28:27,869 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:28:27,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:28:27,873 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:28:27,876 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:28:27,877 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:28:27,878 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:28:27,881 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:28:27,882 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:28:27,882 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:28:27,883 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:28:27,884 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:28:27,885 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:28:27,885 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:28:27,886 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:28:27,887 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:28:27,888 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:28:27,889 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:28:27,889 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:28:27,890 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:28:27,890 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:28:27,891 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:28:27,892 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:28:27,892 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:28:27,895 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 01:28:27,943 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:28:27,943 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:28:27,946 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:28:27,947 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:28:27,947 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:28:27,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:28:27,947 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:28:27,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:28:27,948 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:28:27,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:28:27,949 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:28:27,949 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:28:27,949 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:28:27,949 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:28:27,950 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:28:27,950 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:28:27,950 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:28:27,950 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:28:27,950 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:28:27,951 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:28:27,951 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:28:27,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:28:27,952 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:28:27,952 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:28:27,952 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:28:27,952 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:28:27,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:28:27,953 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:28:27,953 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:28:27,953 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:28:28,352 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:28:28,381 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:28:28,384 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:28:28,386 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:28:28,387 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:28:28,388 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_15-2.c [2020-10-27 01:28:28,480 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/35aab556b/66fef85e04e047ab922ae92356c7def3/FLAGca6680ce3 [2020-10-27 01:28:29,201 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:28:29,202 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_15-2.c [2020-10-27 01:28:29,215 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/35aab556b/66fef85e04e047ab922ae92356c7def3/FLAGca6680ce3 [2020-10-27 01:28:29,234 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/35aab556b/66fef85e04e047ab922ae92356c7def3 [2020-10-27 01:28:29,237 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:28:29,246 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:28:29,249 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:28:29,249 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:28:29,253 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:28:29,255 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:28:29" (1/1) ... [2020-10-27 01:28:29,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39a65c84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:29, skipping insertion in model container [2020-10-27 01:28:29,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:28:29" (1/1) ... [2020-10-27 01:28:29,271 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:28:29,308 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:28:29,595 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:28:29,611 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:28:29,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:28:29,715 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:28:29,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:29 WrapperNode [2020-10-27 01:28:29,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:28:29,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:28:29,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:28:29,720 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:28:29,735 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:29" (1/1) ... [2020-10-27 01:28:29,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:29" (1/1) ... [2020-10-27 01:28:29,763 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:29" (1/1) ... [2020-10-27 01:28:29,763 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:29" (1/1) ... [2020-10-27 01:28:29,772 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:29" (1/1) ... [2020-10-27 01:28:29,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:29" (1/1) ... [2020-10-27 01:28:29,782 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:29" (1/1) ... [2020-10-27 01:28:29,785 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:28:29,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:28:29,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:28:29,787 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:28:29,787 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:29" (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 01:28:29,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:28:29,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:28:29,863 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:28:29,863 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:28:29,863 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:28:29,863 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:28:29,863 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:28:29,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:28:29,864 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:28:29,864 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:28:29,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:28:29,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:28:29,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:28:29,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:28:29,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:28:29,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:28:30,404 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:28:30,404 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 01:28:30,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:28:30 BoogieIcfgContainer [2020-10-27 01:28:30,406 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:28:30,408 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:28:30,408 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:28:30,412 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:28:30,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:28:29" (1/3) ... [2020-10-27 01:28:30,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@433a1e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:28:30, skipping insertion in model container [2020-10-27 01:28:30,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:29" (2/3) ... [2020-10-27 01:28:30,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@433a1e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:28:30, skipping insertion in model container [2020-10-27 01:28:30,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:28:30" (3/3) ... [2020-10-27 01:28:30,415 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_15-2.c [2020-10-27 01:28:30,428 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:28:30,434 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:28:30,449 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:28:30,491 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:28:30,491 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:28:30,491 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:28:30,491 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:28:30,491 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:28:30,492 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:28:30,492 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:28:30,492 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:28:30,515 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2020-10-27 01:28:30,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:28:30,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:30,527 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:28:30,527 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:30,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:30,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1271024494, now seen corresponding path program 1 times [2020-10-27 01:28:30,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:30,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802925728] [2020-10-27 01:28:30,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:30,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:30,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:31,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:31,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:28:31,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:31,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 280 [2020-10-27 01:28:31,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:31,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:31,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 01:28:31,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:28:31,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:28:31,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:31,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:31,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:31,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:31,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:31,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:31,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 01:28:31,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:31,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:31,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:31,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:31,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:31,206 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 01:28:31,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802925728] [2020-10-27 01:28:31,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:31,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:31,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056578383] [2020-10-27 01:28:31,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:31,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:31,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:31,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:31,234 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 4 states. [2020-10-27 01:28:31,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:31,719 INFO L93 Difference]: Finished difference Result 122 states and 217 transitions. [2020-10-27 01:28:31,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:31,722 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-27 01:28:31,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:31,736 INFO L225 Difference]: With dead ends: 122 [2020-10-27 01:28:31,736 INFO L226 Difference]: Without dead ends: 103 [2020-10-27 01:28:31,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:31,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-27 01:28:31,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 72. [2020-10-27 01:28:31,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 01:28:31,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 131 transitions. [2020-10-27 01:28:31,795 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 131 transitions. Word has length 27 [2020-10-27 01:28:31,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:31,796 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 131 transitions. [2020-10-27 01:28:31,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:31,796 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 131 transitions. [2020-10-27 01:28:31,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:28:31,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:31,798 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:28:31,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:28:31,815 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:31,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:31,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1334999060, now seen corresponding path program 1 times [2020-10-27 01:28:31,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:31,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467373189] [2020-10-27 01:28:31,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:31,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:31,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:31,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:31,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:28:31,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:31,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-27 01:28:31,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:31,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:31,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 01:28:31,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:28:31,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:28:32,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:32,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:32,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:32,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:32,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:32,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:32,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 01:28:32,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:32,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:32,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:32,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:32,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:32,090 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 01:28:32,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467373189] [2020-10-27 01:28:32,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:32,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:32,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794035383] [2020-10-27 01:28:32,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:32,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:32,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:32,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:32,095 INFO L87 Difference]: Start difference. First operand 72 states and 131 transitions. Second operand 4 states. [2020-10-27 01:28:32,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:32,516 INFO L93 Difference]: Finished difference Result 169 states and 315 transitions. [2020-10-27 01:28:32,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:32,518 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-27 01:28:32,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:32,520 INFO L225 Difference]: With dead ends: 169 [2020-10-27 01:28:32,521 INFO L226 Difference]: Without dead ends: 103 [2020-10-27 01:28:32,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:32,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-27 01:28:32,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-27 01:28:32,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-27 01:28:32,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 187 transitions. [2020-10-27 01:28:32,554 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 187 transitions. Word has length 27 [2020-10-27 01:28:32,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:32,555 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 187 transitions. [2020-10-27 01:28:32,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:32,555 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 187 transitions. [2020-10-27 01:28:32,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:28:32,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:32,557 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] [2020-10-27 01:28:32,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:28:32,557 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:32,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:32,561 INFO L82 PathProgramCache]: Analyzing trace with hash -740495476, now seen corresponding path program 1 times [2020-10-27 01:28:32,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:32,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895012782] [2020-10-27 01:28:32,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:32,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:32,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:32,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:32,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:32,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:28:32,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:28:32,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 246 [2020-10-27 01:28:32,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:32,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:32,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 01:28:32,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:28:32,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:28:32,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:32,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:32,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:32,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:32,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:32,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:32,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:28:32,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:32,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:32,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:32,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:32,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:32,949 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 01:28:32,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895012782] [2020-10-27 01:28:32,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:32,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:32,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605072673] [2020-10-27 01:28:32,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:32,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:32,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:32,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:32,954 INFO L87 Difference]: Start difference. First operand 102 states and 187 transitions. Second operand 4 states. [2020-10-27 01:28:33,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:33,345 INFO L93 Difference]: Finished difference Result 155 states and 282 transitions. [2020-10-27 01:28:33,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:33,346 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-27 01:28:33,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:33,348 INFO L225 Difference]: With dead ends: 155 [2020-10-27 01:28:33,348 INFO L226 Difference]: Without dead ends: 106 [2020-10-27 01:28:33,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:33,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-27 01:28:33,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-10-27 01:28:33,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-27 01:28:33,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 189 transitions. [2020-10-27 01:28:33,361 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 189 transitions. Word has length 28 [2020-10-27 01:28:33,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:33,362 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 189 transitions. [2020-10-27 01:28:33,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:33,362 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 189 transitions. [2020-10-27 01:28:33,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:28:33,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:33,363 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] [2020-10-27 01:28:33,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:28:33,364 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:33,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:33,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1558143926, now seen corresponding path program 1 times [2020-10-27 01:28:33,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:33,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1126673378] [2020-10-27 01:28:33,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:33,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:33,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:33,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:33,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:28:33,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:33,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-27 01:28:33,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:33,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:33,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 01:28:33,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:28:33,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:33,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:33,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:33,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:33,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:33,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:33,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:33,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:28:33,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:33,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:33,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:33,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:33,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:33,516 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 01:28:33,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1126673378] [2020-10-27 01:28:33,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:33,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:33,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208523953] [2020-10-27 01:28:33,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:33,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:33,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:33,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:33,519 INFO L87 Difference]: Start difference. First operand 105 states and 189 transitions. Second operand 4 states. [2020-10-27 01:28:33,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:33,913 INFO L93 Difference]: Finished difference Result 293 states and 542 transitions. [2020-10-27 01:28:33,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:33,914 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-27 01:28:33,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:33,916 INFO L225 Difference]: With dead ends: 293 [2020-10-27 01:28:33,916 INFO L226 Difference]: Without dead ends: 197 [2020-10-27 01:28:33,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:33,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-27 01:28:33,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2020-10-27 01:28:33,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-27 01:28:33,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 358 transitions. [2020-10-27 01:28:33,933 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 358 transitions. Word has length 28 [2020-10-27 01:28:33,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:33,934 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 358 transitions. [2020-10-27 01:28:33,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:33,934 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 358 transitions. [2020-10-27 01:28:33,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:28:33,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:33,936 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] [2020-10-27 01:28:33,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:28:33,936 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:33,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:33,937 INFO L82 PathProgramCache]: Analyzing trace with hash 130799816, now seen corresponding path program 1 times [2020-10-27 01:28:33,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:33,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407220946] [2020-10-27 01:28:33,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:33,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:33,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:34,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:34,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:28:34,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:34,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-27 01:28:34,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:34,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:34,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 01:28:34,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:28:34,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:34,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:34,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:34,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:34,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:34,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:34,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:34,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:28:34,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:34,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:34,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:34,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:34,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:34,109 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 01:28:34,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407220946] [2020-10-27 01:28:34,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:34,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:34,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155835784] [2020-10-27 01:28:34,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:34,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:34,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:34,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:34,112 INFO L87 Difference]: Start difference. First operand 196 states and 358 transitions. Second operand 4 states. [2020-10-27 01:28:34,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:34,483 INFO L93 Difference]: Finished difference Result 256 states and 469 transitions. [2020-10-27 01:28:34,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:34,484 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-27 01:28:34,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:34,486 INFO L225 Difference]: With dead ends: 256 [2020-10-27 01:28:34,486 INFO L226 Difference]: Without dead ends: 253 [2020-10-27 01:28:34,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:34,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-27 01:28:34,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 196. [2020-10-27 01:28:34,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-27 01:28:34,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 356 transitions. [2020-10-27 01:28:34,525 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 356 transitions. Word has length 28 [2020-10-27 01:28:34,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:34,526 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 356 transitions. [2020-10-27 01:28:34,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:34,528 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 356 transitions. [2020-10-27 01:28:34,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:28:34,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:34,530 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] [2020-10-27 01:28:34,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:28:34,531 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:34,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:34,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1051252705, now seen corresponding path program 1 times [2020-10-27 01:28:34,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:34,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852832696] [2020-10-27 01:28:34,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:34,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:34,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:34,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:34,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:28:34,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:34,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-27 01:28:34,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:34,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:34,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 01:28:34,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:28:34,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:34,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:34,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:34,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:34,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:34,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:34,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:34,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:28:34,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:34,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:34,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:34,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:34,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:34,704 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 01:28:34,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852832696] [2020-10-27 01:28:34,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:34,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:34,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636569014] [2020-10-27 01:28:34,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:34,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:34,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:34,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:34,708 INFO L87 Difference]: Start difference. First operand 196 states and 356 transitions. Second operand 4 states. [2020-10-27 01:28:35,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:35,072 INFO L93 Difference]: Finished difference Result 372 states and 685 transitions. [2020-10-27 01:28:35,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:35,073 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-27 01:28:35,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:35,076 INFO L225 Difference]: With dead ends: 372 [2020-10-27 01:28:35,076 INFO L226 Difference]: Without dead ends: 369 [2020-10-27 01:28:35,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:35,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-10-27 01:28:35,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 264. [2020-10-27 01:28:35,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-27 01:28:35,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 478 transitions. [2020-10-27 01:28:35,091 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 478 transitions. Word has length 29 [2020-10-27 01:28:35,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:35,092 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 478 transitions. [2020-10-27 01:28:35,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:35,092 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 478 transitions. [2020-10-27 01:28:35,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:28:35,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:35,096 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] [2020-10-27 01:28:35,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:28:35,096 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:35,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:35,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1554770849, now seen corresponding path program 1 times [2020-10-27 01:28:35,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:35,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070465729] [2020-10-27 01:28:35,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:35,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:35,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:35,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:35,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:28:35,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:35,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-27 01:28:35,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:35,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:35,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 01:28:35,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:28:35,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:35,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:35,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:35,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:35,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:35,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:35,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:35,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:28:35,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:35,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:35,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:35,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:35,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:35,253 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 01:28:35,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070465729] [2020-10-27 01:28:35,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:35,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:35,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297282985] [2020-10-27 01:28:35,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:35,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:35,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:35,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:35,256 INFO L87 Difference]: Start difference. First operand 264 states and 478 transitions. Second operand 4 states. [2020-10-27 01:28:35,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:35,632 INFO L93 Difference]: Finished difference Result 632 states and 1157 transitions. [2020-10-27 01:28:35,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:35,633 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-27 01:28:35,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:35,636 INFO L225 Difference]: With dead ends: 632 [2020-10-27 01:28:35,636 INFO L226 Difference]: Without dead ends: 377 [2020-10-27 01:28:35,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:35,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-10-27 01:28:35,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 376. [2020-10-27 01:28:35,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2020-10-27 01:28:35,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 680 transitions. [2020-10-27 01:28:35,664 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 680 transitions. Word has length 29 [2020-10-27 01:28:35,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:35,664 INFO L481 AbstractCegarLoop]: Abstraction has 376 states and 680 transitions. [2020-10-27 01:28:35,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:35,664 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 680 transitions. [2020-10-27 01:28:35,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:28:35,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:35,676 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] [2020-10-27 01:28:35,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:28:35,677 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:35,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:35,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1777483829, now seen corresponding path program 1 times [2020-10-27 01:28:35,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:35,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758435166] [2020-10-27 01:28:35,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:35,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:35,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:35,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:35,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:35,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:28:35,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:28:35,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-27 01:28:35,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:35,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:35,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 01:28:35,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:28:35,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:35,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:35,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:35,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:35,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:35,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:35,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:35,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:28:35,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:35,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:35,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:35,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:35,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:35,872 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 01:28:35,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758435166] [2020-10-27 01:28:35,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:35,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:35,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978873338] [2020-10-27 01:28:35,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:35,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:35,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:35,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:35,876 INFO L87 Difference]: Start difference. First operand 376 states and 680 transitions. Second operand 4 states. [2020-10-27 01:28:36,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:36,225 INFO L93 Difference]: Finished difference Result 566 states and 1023 transitions. [2020-10-27 01:28:36,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:36,227 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-27 01:28:36,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:36,231 INFO L225 Difference]: With dead ends: 566 [2020-10-27 01:28:36,231 INFO L226 Difference]: Without dead ends: 383 [2020-10-27 01:28:36,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:36,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-10-27 01:28:36,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 382. [2020-10-27 01:28:36,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 382 states. [2020-10-27 01:28:36,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 684 transitions. [2020-10-27 01:28:36,249 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 684 transitions. Word has length 30 [2020-10-27 01:28:36,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:36,250 INFO L481 AbstractCegarLoop]: Abstraction has 382 states and 684 transitions. [2020-10-27 01:28:36,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:36,250 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 684 transitions. [2020-10-27 01:28:36,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:28:36,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:36,254 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] [2020-10-27 01:28:36,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:28:36,255 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:36,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:36,262 INFO L82 PathProgramCache]: Analyzing trace with hash 959835379, now seen corresponding path program 1 times [2020-10-27 01:28:36,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:36,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259399624] [2020-10-27 01:28:36,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:36,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:36,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:36,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:36,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:28:36,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:36,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-27 01:28:36,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:36,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:36,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 01:28:36,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:28:36,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:36,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:36,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:36,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:36,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:36,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:36,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:36,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:28:36,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:36,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:36,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:36,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:36,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:36,483 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 01:28:36,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259399624] [2020-10-27 01:28:36,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:36,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:36,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295963355] [2020-10-27 01:28:36,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:36,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:36,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:36,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:36,492 INFO L87 Difference]: Start difference. First operand 382 states and 684 transitions. Second operand 4 states. [2020-10-27 01:28:36,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:36,872 INFO L93 Difference]: Finished difference Result 718 states and 1303 transitions. [2020-10-27 01:28:36,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:36,874 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-27 01:28:36,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:36,879 INFO L225 Difference]: With dead ends: 718 [2020-10-27 01:28:36,879 INFO L226 Difference]: Without dead ends: 715 [2020-10-27 01:28:36,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:36,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2020-10-27 01:28:36,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 522. [2020-10-27 01:28:36,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2020-10-27 01:28:36,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 924 transitions. [2020-10-27 01:28:36,900 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 924 transitions. Word has length 30 [2020-10-27 01:28:36,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:36,900 INFO L481 AbstractCegarLoop]: Abstraction has 522 states and 924 transitions. [2020-10-27 01:28:36,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:36,901 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 924 transitions. [2020-10-27 01:28:36,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:28:36,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:36,902 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] [2020-10-27 01:28:36,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:28:36,902 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:36,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:36,903 INFO L82 PathProgramCache]: Analyzing trace with hash -729108363, now seen corresponding path program 1 times [2020-10-27 01:28:36,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:36,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247904970] [2020-10-27 01:28:36,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:36,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:36,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:36,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:36,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:28:36,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:36,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-27 01:28:36,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:36,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:36,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 01:28:36,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:28:36,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:37,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:37,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:37,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:37,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:37,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:37,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:37,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:28:37,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:37,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:37,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:37,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:37,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:37,034 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 01:28:37,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247904970] [2020-10-27 01:28:37,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:37,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:37,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440120440] [2020-10-27 01:28:37,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:37,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:37,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:37,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:37,036 INFO L87 Difference]: Start difference. First operand 522 states and 924 transitions. Second operand 4 states. [2020-10-27 01:28:37,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:37,415 INFO L93 Difference]: Finished difference Result 1246 states and 2223 transitions. [2020-10-27 01:28:37,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:37,416 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-27 01:28:37,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:37,421 INFO L225 Difference]: With dead ends: 1246 [2020-10-27 01:28:37,421 INFO L226 Difference]: Without dead ends: 739 [2020-10-27 01:28:37,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:37,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2020-10-27 01:28:37,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 738. [2020-10-27 01:28:37,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 738 states. [2020-10-27 01:28:37,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1304 transitions. [2020-10-27 01:28:37,452 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1304 transitions. Word has length 30 [2020-10-27 01:28:37,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:37,453 INFO L481 AbstractCegarLoop]: Abstraction has 738 states and 1304 transitions. [2020-10-27 01:28:37,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:37,453 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1304 transitions. [2020-10-27 01:28:37,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:28:37,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:37,454 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] [2020-10-27 01:28:37,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:28:37,454 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:37,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:37,455 INFO L82 PathProgramCache]: Analyzing trace with hash -303284436, now seen corresponding path program 1 times [2020-10-27 01:28:37,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:37,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673858039] [2020-10-27 01:28:37,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:37,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:37,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:37,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:37,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:37,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:28:37,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:28:37,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-27 01:28:37,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:37,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:37,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 01:28:37,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:28:37,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:37,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:37,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:37,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:37,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:37,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:37,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:37,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:28:37,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:37,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:37,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:37,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:37,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:37,705 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 01:28:37,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673858039] [2020-10-27 01:28:37,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:37,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:37,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213856530] [2020-10-27 01:28:37,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:37,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:37,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:37,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:37,708 INFO L87 Difference]: Start difference. First operand 738 states and 1304 transitions. Second operand 4 states. [2020-10-27 01:28:38,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:38,100 INFO L93 Difference]: Finished difference Result 1106 states and 1951 transitions. [2020-10-27 01:28:38,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:38,101 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-27 01:28:38,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:38,108 INFO L225 Difference]: With dead ends: 1106 [2020-10-27 01:28:38,108 INFO L226 Difference]: Without dead ends: 747 [2020-10-27 01:28:38,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:38,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2020-10-27 01:28:38,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 746. [2020-10-27 01:28:38,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 746 states. [2020-10-27 01:28:38,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1304 transitions. [2020-10-27 01:28:38,136 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1304 transitions. Word has length 31 [2020-10-27 01:28:38,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:38,137 INFO L481 AbstractCegarLoop]: Abstraction has 746 states and 1304 transitions. [2020-10-27 01:28:38,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:38,137 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1304 transitions. [2020-10-27 01:28:38,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:28:38,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:38,139 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] [2020-10-27 01:28:38,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:28:38,139 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:38,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:38,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1120932886, now seen corresponding path program 1 times [2020-10-27 01:28:38,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:38,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664047082] [2020-10-27 01:28:38,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:38,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:38,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:38,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:38,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:28:38,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:38,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-27 01:28:38,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:38,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:38,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 01:28:38,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:28:38,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:28:38,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:38,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:38,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:38,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:38,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:38,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:38,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:28:38,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:38,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:38,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:38,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:38,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:38,310 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 01:28:38,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664047082] [2020-10-27 01:28:38,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:38,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:38,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067121850] [2020-10-27 01:28:38,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:38,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:38,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:38,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:38,312 INFO L87 Difference]: Start difference. First operand 746 states and 1304 transitions. Second operand 4 states. [2020-10-27 01:28:38,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:38,689 INFO L93 Difference]: Finished difference Result 1390 states and 2467 transitions. [2020-10-27 01:28:38,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:38,689 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-27 01:28:38,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:38,696 INFO L225 Difference]: With dead ends: 1390 [2020-10-27 01:28:38,697 INFO L226 Difference]: Without dead ends: 1387 [2020-10-27 01:28:38,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:38,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2020-10-27 01:28:38,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 1034. [2020-10-27 01:28:38,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1034 states. [2020-10-27 01:28:38,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1776 transitions. [2020-10-27 01:28:38,758 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1776 transitions. Word has length 31 [2020-10-27 01:28:38,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:38,759 INFO L481 AbstractCegarLoop]: Abstraction has 1034 states and 1776 transitions. [2020-10-27 01:28:38,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:38,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1776 transitions. [2020-10-27 01:28:38,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:28:38,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:38,762 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] [2020-10-27 01:28:38,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:28:38,762 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:38,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:38,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1485090668, now seen corresponding path program 1 times [2020-10-27 01:28:38,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:38,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893642625] [2020-10-27 01:28:38,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:38,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:38,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:38,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:38,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:28:38,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:38,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-27 01:28:38,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:38,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:38,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 01:28:38,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:28:38,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:28:38,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:38,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:38,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:38,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:38,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:38,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:38,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:28:38,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:38,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:38,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:38,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:38,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:38,913 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 01:28:38,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893642625] [2020-10-27 01:28:38,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:38,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:38,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350223829] [2020-10-27 01:28:38,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:38,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:38,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:38,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:38,916 INFO L87 Difference]: Start difference. First operand 1034 states and 1776 transitions. Second operand 4 states. [2020-10-27 01:28:39,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:39,279 INFO L93 Difference]: Finished difference Result 2462 states and 4259 transitions. [2020-10-27 01:28:39,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:39,280 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-27 01:28:39,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:39,287 INFO L225 Difference]: With dead ends: 2462 [2020-10-27 01:28:39,288 INFO L226 Difference]: Without dead ends: 1451 [2020-10-27 01:28:39,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:39,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2020-10-27 01:28:39,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1450. [2020-10-27 01:28:39,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1450 states. [2020-10-27 01:28:39,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1450 states to 1450 states and 2488 transitions. [2020-10-27 01:28:39,341 INFO L78 Accepts]: Start accepts. Automaton has 1450 states and 2488 transitions. Word has length 31 [2020-10-27 01:28:39,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:39,342 INFO L481 AbstractCegarLoop]: Abstraction has 1450 states and 2488 transitions. [2020-10-27 01:28:39,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:39,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1450 states and 2488 transitions. [2020-10-27 01:28:39,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:28:39,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:39,344 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] [2020-10-27 01:28:39,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:28:39,344 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:39,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:39,345 INFO L82 PathProgramCache]: Analyzing trace with hash -382580640, now seen corresponding path program 1 times [2020-10-27 01:28:39,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:39,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032634661] [2020-10-27 01:28:39,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:39,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:39,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:39,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:39,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:39,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:28:39,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:28:39,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-27 01:28:39,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:39,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:39,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 01:28:39,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:28:39,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:39,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:39,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:39,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:39,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:39,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:39,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:39,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:28:39,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:39,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:39,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:39,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:39,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:28:39,553 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 01:28:39,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032634661] [2020-10-27 01:28:39,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:39,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:39,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562669777] [2020-10-27 01:28:39,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:39,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:39,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:39,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:39,557 INFO L87 Difference]: Start difference. First operand 1450 states and 2488 transitions. Second operand 4 states. [2020-10-27 01:28:39,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:39,984 INFO L93 Difference]: Finished difference Result 2174 states and 3723 transitions. [2020-10-27 01:28:39,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:39,985 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-27 01:28:39,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:39,994 INFO L225 Difference]: With dead ends: 2174 [2020-10-27 01:28:39,995 INFO L226 Difference]: Without dead ends: 1467 [2020-10-27 01:28:39,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:39,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2020-10-27 01:28:40,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 1466. [2020-10-27 01:28:40,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1466 states. [2020-10-27 01:28:40,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 2488 transitions. [2020-10-27 01:28:40,045 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 2488 transitions. Word has length 32 [2020-10-27 01:28:40,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:40,045 INFO L481 AbstractCegarLoop]: Abstraction has 1466 states and 2488 transitions. [2020-10-27 01:28:40,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:40,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 2488 transitions. [2020-10-27 01:28:40,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:28:40,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:40,047 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] [2020-10-27 01:28:40,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:28:40,048 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:40,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:40,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1200229090, now seen corresponding path program 1 times [2020-10-27 01:28:40,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:40,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1056658994] [2020-10-27 01:28:40,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:40,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:40,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:40,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:40,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:28:40,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:40,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-27 01:28:40,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:40,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:40,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 01:28:40,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:28:40,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:28:40,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:40,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:40,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:40,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:40,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:40,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:40,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:28:40,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:40,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:40,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:40,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:40,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:40,171 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 01:28:40,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1056658994] [2020-10-27 01:28:40,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:40,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:40,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777297278] [2020-10-27 01:28:40,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:40,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:40,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:40,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:40,174 INFO L87 Difference]: Start difference. First operand 1466 states and 2488 transitions. Second operand 4 states. [2020-10-27 01:28:40,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:40,555 INFO L93 Difference]: Finished difference Result 2702 states and 4667 transitions. [2020-10-27 01:28:40,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:40,556 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-27 01:28:40,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:40,569 INFO L225 Difference]: With dead ends: 2702 [2020-10-27 01:28:40,569 INFO L226 Difference]: Without dead ends: 2699 [2020-10-27 01:28:40,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:40,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2699 states. [2020-10-27 01:28:40,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2699 to 2058. [2020-10-27 01:28:40,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2058 states. [2020-10-27 01:28:40,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 3416 transitions. [2020-10-27 01:28:40,653 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 3416 transitions. Word has length 32 [2020-10-27 01:28:40,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:40,653 INFO L481 AbstractCegarLoop]: Abstraction has 2058 states and 3416 transitions. [2020-10-27 01:28:40,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:40,653 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 3416 transitions. [2020-10-27 01:28:40,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:28:40,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:40,656 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] [2020-10-27 01:28:40,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:28:40,657 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:40,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:40,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1405794464, now seen corresponding path program 1 times [2020-10-27 01:28:40,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:40,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463199595] [2020-10-27 01:28:40,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:40,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:40,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:40,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:40,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:28:40,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:40,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-27 01:28:40,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:40,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:40,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 01:28:40,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:28:40,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:40,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:40,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:40,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:40,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:40,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:40,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:40,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:28:40,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:40,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:40,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:40,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:40,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:40,822 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 01:28:40,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463199595] [2020-10-27 01:28:40,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:40,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:40,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891303849] [2020-10-27 01:28:40,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:40,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:40,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:40,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:40,825 INFO L87 Difference]: Start difference. First operand 2058 states and 3416 transitions. Second operand 4 states. [2020-10-27 01:28:41,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:41,250 INFO L93 Difference]: Finished difference Result 4878 states and 8155 transitions. [2020-10-27 01:28:41,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:41,251 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-27 01:28:41,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:41,266 INFO L225 Difference]: With dead ends: 4878 [2020-10-27 01:28:41,266 INFO L226 Difference]: Without dead ends: 2859 [2020-10-27 01:28:41,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:41,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2859 states. [2020-10-27 01:28:41,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2859 to 2858. [2020-10-27 01:28:41,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2858 states. [2020-10-27 01:28:41,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2858 states to 2858 states and 4744 transitions. [2020-10-27 01:28:41,379 INFO L78 Accepts]: Start accepts. Automaton has 2858 states and 4744 transitions. Word has length 32 [2020-10-27 01:28:41,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:41,379 INFO L481 AbstractCegarLoop]: Abstraction has 2858 states and 4744 transitions. [2020-10-27 01:28:41,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:41,379 INFO L276 IsEmpty]: Start isEmpty. Operand 2858 states and 4744 transitions. [2020-10-27 01:28:41,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:28:41,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:41,382 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] [2020-10-27 01:28:41,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:28:41,383 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:41,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:41,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1454214903, now seen corresponding path program 1 times [2020-10-27 01:28:41,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:41,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118216376] [2020-10-27 01:28:41,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:41,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:41,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:41,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:41,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:41,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:28:41,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:28:41,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-27 01:28:41,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:41,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:41,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 01:28:41,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:28:41,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:41,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:41,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:41,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:41,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:41,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:41,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:41,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:28:41,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:41,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:41,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:41,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:41,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:41,560 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 01:28:41,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118216376] [2020-10-27 01:28:41,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:41,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:41,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101760562] [2020-10-27 01:28:41,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:41,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:41,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:41,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:41,562 INFO L87 Difference]: Start difference. First operand 2858 states and 4744 transitions. Second operand 4 states. [2020-10-27 01:28:41,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:41,983 INFO L93 Difference]: Finished difference Result 4286 states and 7099 transitions. [2020-10-27 01:28:41,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:41,984 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-27 01:28:41,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:41,997 INFO L225 Difference]: With dead ends: 4286 [2020-10-27 01:28:41,997 INFO L226 Difference]: Without dead ends: 2891 [2020-10-27 01:28:42,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:42,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2891 states. [2020-10-27 01:28:42,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2891 to 2890. [2020-10-27 01:28:42,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2890 states. [2020-10-27 01:28:42,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2890 states to 2890 states and 4744 transitions. [2020-10-27 01:28:42,101 INFO L78 Accepts]: Start accepts. Automaton has 2890 states and 4744 transitions. Word has length 33 [2020-10-27 01:28:42,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:42,101 INFO L481 AbstractCegarLoop]: Abstraction has 2890 states and 4744 transitions. [2020-10-27 01:28:42,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:42,102 INFO L276 IsEmpty]: Start isEmpty. Operand 2890 states and 4744 transitions. [2020-10-27 01:28:42,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:28:42,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:42,105 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] [2020-10-27 01:28:42,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:28:42,105 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:42,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:42,106 INFO L82 PathProgramCache]: Analyzing trace with hash 636566453, now seen corresponding path program 1 times [2020-10-27 01:28:42,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:42,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85067680] [2020-10-27 01:28:42,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:42,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:42,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:42,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:42,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:28:42,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:42,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-27 01:28:42,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:42,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:42,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 01:28:42,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:28:42,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:42,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:42,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:42,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:42,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:42,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:42,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:42,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:28:42,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:42,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:42,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:42,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:42,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:42,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:42,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85067680] [2020-10-27 01:28:42,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:42,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:42,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597973280] [2020-10-27 01:28:42,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:42,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:42,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:42,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:42,233 INFO L87 Difference]: Start difference. First operand 2890 states and 4744 transitions. Second operand 4 states. [2020-10-27 01:28:42,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:42,667 INFO L93 Difference]: Finished difference Result 5262 states and 8811 transitions. [2020-10-27 01:28:42,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:42,668 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-27 01:28:42,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:42,696 INFO L225 Difference]: With dead ends: 5262 [2020-10-27 01:28:42,696 INFO L226 Difference]: Without dead ends: 5259 [2020-10-27 01:28:42,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:42,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5259 states. [2020-10-27 01:28:42,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5259 to 4106. [2020-10-27 01:28:42,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4106 states. [2020-10-27 01:28:42,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4106 states to 4106 states and 6568 transitions. [2020-10-27 01:28:42,849 INFO L78 Accepts]: Start accepts. Automaton has 4106 states and 6568 transitions. Word has length 33 [2020-10-27 01:28:42,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:42,849 INFO L481 AbstractCegarLoop]: Abstraction has 4106 states and 6568 transitions. [2020-10-27 01:28:42,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:42,850 INFO L276 IsEmpty]: Start isEmpty. Operand 4106 states and 6568 transitions. [2020-10-27 01:28:42,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:28:42,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:42,855 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] [2020-10-27 01:28:42,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:28:42,855 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:42,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:42,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1052377289, now seen corresponding path program 1 times [2020-10-27 01:28:42,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:42,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113938245] [2020-10-27 01:28:42,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:42,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:42,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:42,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:42,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:28:42,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:42,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 01:28:42,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:42,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:42,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 01:28:42,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:28:42,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:42,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:42,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:42,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:42,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:42,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:42,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:42,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:28:42,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:42,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:42,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:42,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:42,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:42,972 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 01:28:42,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113938245] [2020-10-27 01:28:42,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:42,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:42,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720915830] [2020-10-27 01:28:42,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:42,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:42,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:42,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:42,974 INFO L87 Difference]: Start difference. First operand 4106 states and 6568 transitions. Second operand 4 states. [2020-10-27 01:28:43,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:43,350 INFO L93 Difference]: Finished difference Result 9678 states and 15595 transitions. [2020-10-27 01:28:43,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:43,351 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-27 01:28:43,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:43,374 INFO L225 Difference]: With dead ends: 9678 [2020-10-27 01:28:43,374 INFO L226 Difference]: Without dead ends: 5643 [2020-10-27 01:28:43,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:43,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5643 states. [2020-10-27 01:28:43,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5643 to 5642. [2020-10-27 01:28:43,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5642 states. [2020-10-27 01:28:43,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5642 states to 5642 states and 9032 transitions. [2020-10-27 01:28:43,539 INFO L78 Accepts]: Start accepts. Automaton has 5642 states and 9032 transitions. Word has length 33 [2020-10-27 01:28:43,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:43,539 INFO L481 AbstractCegarLoop]: Abstraction has 5642 states and 9032 transitions. [2020-10-27 01:28:43,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:43,539 INFO L276 IsEmpty]: Start isEmpty. Operand 5642 states and 9032 transitions. [2020-10-27 01:28:43,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:28:43,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:43,545 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] [2020-10-27 01:28:43,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:28:43,545 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:43,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:43,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1734654837, now seen corresponding path program 1 times [2020-10-27 01:28:43,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:43,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243766424] [2020-10-27 01:28:43,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:43,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:43,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:43,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:43,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:43,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:28:43,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:28:43,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-27 01:28:43,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:43,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:43,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 01:28:43,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:28:43,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:43,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:43,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:43,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:43,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:43,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:43,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:43,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:28:43,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:43,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:43,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:43,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:43,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:43,777 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 01:28:43,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243766424] [2020-10-27 01:28:43,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:43,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:43,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40113001] [2020-10-27 01:28:43,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:43,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:43,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:43,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:43,779 INFO L87 Difference]: Start difference. First operand 5642 states and 9032 transitions. Second operand 4 states. [2020-10-27 01:28:44,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:44,151 INFO L93 Difference]: Finished difference Result 8462 states and 13515 transitions. [2020-10-27 01:28:44,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:44,152 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-10-27 01:28:44,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:44,165 INFO L225 Difference]: With dead ends: 8462 [2020-10-27 01:28:44,165 INFO L226 Difference]: Without dead ends: 5707 [2020-10-27 01:28:44,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:44,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5707 states. [2020-10-27 01:28:44,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5707 to 5706. [2020-10-27 01:28:44,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5706 states. [2020-10-27 01:28:44,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5706 states to 5706 states and 9032 transitions. [2020-10-27 01:28:44,318 INFO L78 Accepts]: Start accepts. Automaton has 5706 states and 9032 transitions. Word has length 34 [2020-10-27 01:28:44,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:44,319 INFO L481 AbstractCegarLoop]: Abstraction has 5706 states and 9032 transitions. [2020-10-27 01:28:44,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:44,319 INFO L276 IsEmpty]: Start isEmpty. Operand 5706 states and 9032 transitions. [2020-10-27 01:28:44,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:28:44,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:44,325 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] [2020-10-27 01:28:44,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:28:44,325 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:44,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:44,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1742664009, now seen corresponding path program 1 times [2020-10-27 01:28:44,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:44,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929020417] [2020-10-27 01:28:44,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:44,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:44,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:44,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:44,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:28:44,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:44,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-27 01:28:44,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:44,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:44,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 01:28:44,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:28:44,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:44,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:44,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:44,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:44,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:44,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:44,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:44,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:28:44,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:44,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:44,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:44,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:44,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:44,507 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 01:28:44,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929020417] [2020-10-27 01:28:44,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:44,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:44,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876601713] [2020-10-27 01:28:44,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:44,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:44,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:44,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:44,510 INFO L87 Difference]: Start difference. First operand 5706 states and 9032 transitions. Second operand 4 states. [2020-10-27 01:28:44,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:44,950 INFO L93 Difference]: Finished difference Result 10254 states and 16587 transitions. [2020-10-27 01:28:44,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:44,951 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-10-27 01:28:44,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:44,972 INFO L225 Difference]: With dead ends: 10254 [2020-10-27 01:28:44,972 INFO L226 Difference]: Without dead ends: 10251 [2020-10-27 01:28:44,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:44,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10251 states. [2020-10-27 01:28:45,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10251 to 8202. [2020-10-27 01:28:45,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8202 states. [2020-10-27 01:28:45,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8202 states to 8202 states and 12616 transitions. [2020-10-27 01:28:45,178 INFO L78 Accepts]: Start accepts. Automaton has 8202 states and 12616 transitions. Word has length 34 [2020-10-27 01:28:45,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:45,178 INFO L481 AbstractCegarLoop]: Abstraction has 8202 states and 12616 transitions. [2020-10-27 01:28:45,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:45,178 INFO L276 IsEmpty]: Start isEmpty. Operand 8202 states and 12616 transitions. [2020-10-27 01:28:45,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:28:45,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:45,188 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] [2020-10-27 01:28:45,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:28:45,189 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:45,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:45,189 INFO L82 PathProgramCache]: Analyzing trace with hash 53720267, now seen corresponding path program 1 times [2020-10-27 01:28:45,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:45,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472138665] [2020-10-27 01:28:45,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:45,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:45,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:45,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:45,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:28:45,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:45,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-27 01:28:45,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:45,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:45,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 01:28:45,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:28:45,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:45,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:45,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:45,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:45,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:45,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:45,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:45,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:28:45,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:45,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:45,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:45,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:45,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:45,349 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 01:28:45,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472138665] [2020-10-27 01:28:45,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:45,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:45,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874554165] [2020-10-27 01:28:45,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:45,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:45,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:45,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:45,351 INFO L87 Difference]: Start difference. First operand 8202 states and 12616 transitions. Second operand 4 states. [2020-10-27 01:28:45,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:45,804 INFO L93 Difference]: Finished difference Result 19214 states and 29771 transitions. [2020-10-27 01:28:45,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:45,805 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-10-27 01:28:45,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:45,829 INFO L225 Difference]: With dead ends: 19214 [2020-10-27 01:28:45,829 INFO L226 Difference]: Without dead ends: 11147 [2020-10-27 01:28:45,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:45,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11147 states. [2020-10-27 01:28:46,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11147 to 11146. [2020-10-27 01:28:46,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11146 states. [2020-10-27 01:28:46,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11146 states to 11146 states and 17160 transitions. [2020-10-27 01:28:46,184 INFO L78 Accepts]: Start accepts. Automaton has 11146 states and 17160 transitions. Word has length 34 [2020-10-27 01:28:46,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:46,184 INFO L481 AbstractCegarLoop]: Abstraction has 11146 states and 17160 transitions. [2020-10-27 01:28:46,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:46,184 INFO L276 IsEmpty]: Start isEmpty. Operand 11146 states and 17160 transitions. [2020-10-27 01:28:46,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:28:46,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:46,197 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:28:46,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:28:46,197 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:46,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:46,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1805358398, now seen corresponding path program 1 times [2020-10-27 01:28:46,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:46,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907658046] [2020-10-27 01:28:46,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:46,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:46,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:46,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:46,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:46,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:28:46,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:28:46,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-27 01:28:46,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:46,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:46,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 01:28:46,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:28:46,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:46,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:46,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:46,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:46,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:46,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:46,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:46,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:28:46,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:46,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:46,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:46,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:46,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:46,371 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 01:28:46,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907658046] [2020-10-27 01:28:46,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:46,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:46,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307840366] [2020-10-27 01:28:46,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:46,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:46,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:46,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:46,377 INFO L87 Difference]: Start difference. First operand 11146 states and 17160 transitions. Second operand 4 states. [2020-10-27 01:28:46,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:46,770 INFO L93 Difference]: Finished difference Result 16718 states and 25675 transitions. [2020-10-27 01:28:46,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:46,771 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-27 01:28:46,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:46,796 INFO L225 Difference]: With dead ends: 16718 [2020-10-27 01:28:46,796 INFO L226 Difference]: Without dead ends: 11275 [2020-10-27 01:28:46,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:46,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11275 states. [2020-10-27 01:28:47,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11275 to 11274. [2020-10-27 01:28:47,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11274 states. [2020-10-27 01:28:47,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11274 states to 11274 states and 17160 transitions. [2020-10-27 01:28:47,136 INFO L78 Accepts]: Start accepts. Automaton has 11274 states and 17160 transitions. Word has length 35 [2020-10-27 01:28:47,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:47,136 INFO L481 AbstractCegarLoop]: Abstraction has 11274 states and 17160 transitions. [2020-10-27 01:28:47,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:47,137 INFO L276 IsEmpty]: Start isEmpty. Operand 11274 states and 17160 transitions. [2020-10-27 01:28:47,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:28:47,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:47,147 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:28:47,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:28:47,148 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:47,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:47,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1671960448, now seen corresponding path program 1 times [2020-10-27 01:28:47,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:47,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802102638] [2020-10-27 01:28:47,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:47,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:47,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:47,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:47,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:28:47,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:47,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 01:28:47,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:47,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:47,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:28:47,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:28:47,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:47,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:47,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:47,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:47,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:47,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:47,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:47,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:28:47,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:47,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:47,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:47,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:47,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:47,258 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 01:28:47,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802102638] [2020-10-27 01:28:47,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:47,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:47,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176740026] [2020-10-27 01:28:47,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:47,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:47,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:47,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:47,260 INFO L87 Difference]: Start difference. First operand 11274 states and 17160 transitions. Second operand 4 states. [2020-10-27 01:28:47,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:47,847 INFO L93 Difference]: Finished difference Result 19982 states and 31115 transitions. [2020-10-27 01:28:47,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:47,848 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-27 01:28:47,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:47,876 INFO L225 Difference]: With dead ends: 19982 [2020-10-27 01:28:47,876 INFO L226 Difference]: Without dead ends: 19979 [2020-10-27 01:28:47,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:47,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19979 states. [2020-10-27 01:28:48,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19979 to 16394. [2020-10-27 01:28:48,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16394 states. [2020-10-27 01:28:48,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16394 states to 16394 states and 24200 transitions. [2020-10-27 01:28:48,331 INFO L78 Accepts]: Start accepts. Automaton has 16394 states and 24200 transitions. Word has length 35 [2020-10-27 01:28:48,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:48,331 INFO L481 AbstractCegarLoop]: Abstraction has 16394 states and 24200 transitions. [2020-10-27 01:28:48,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:48,331 INFO L276 IsEmpty]: Start isEmpty. Operand 16394 states and 24200 transitions. [2020-10-27 01:28:48,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:28:48,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:48,352 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:28:48,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:28:48,352 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:48,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:48,353 INFO L82 PathProgramCache]: Analyzing trace with hash -16983294, now seen corresponding path program 1 times [2020-10-27 01:28:48,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:48,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801434488] [2020-10-27 01:28:48,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:48,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:48,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:48,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:48,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:28:48,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:48,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 01:28:48,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:48,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:48,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:28:48,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:28:48,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:48,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:48,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:48,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:48,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:48,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:48,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:48,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:28:48,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:48,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:48,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:48,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:48,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:48,535 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 01:28:48,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801434488] [2020-10-27 01:28:48,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:48,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:48,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582850688] [2020-10-27 01:28:48,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:48,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:48,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:48,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:48,536 INFO L87 Difference]: Start difference. First operand 16394 states and 24200 transitions. Second operand 4 states. [2020-10-27 01:28:49,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:49,146 INFO L93 Difference]: Finished difference Result 38158 states and 56715 transitions. [2020-10-27 01:28:49,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:49,147 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-27 01:28:49,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:49,177 INFO L225 Difference]: With dead ends: 38158 [2020-10-27 01:28:49,177 INFO L226 Difference]: Without dead ends: 22027 [2020-10-27 01:28:49,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:49,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22027 states. [2020-10-27 01:28:49,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22027 to 22026. [2020-10-27 01:28:49,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22026 states. [2020-10-27 01:28:49,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22026 states to 22026 states and 32520 transitions. [2020-10-27 01:28:49,854 INFO L78 Accepts]: Start accepts. Automaton has 22026 states and 32520 transitions. Word has length 35 [2020-10-27 01:28:49,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:49,855 INFO L481 AbstractCegarLoop]: Abstraction has 22026 states and 32520 transitions. [2020-10-27 01:28:49,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:49,855 INFO L276 IsEmpty]: Start isEmpty. Operand 22026 states and 32520 transitions. [2020-10-27 01:28:49,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:28:49,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:49,891 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] [2020-10-27 01:28:49,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:28:49,892 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:49,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:49,892 INFO L82 PathProgramCache]: Analyzing trace with hash 297809078, now seen corresponding path program 1 times [2020-10-27 01:28:49,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:49,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304300762] [2020-10-27 01:28:49,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:49,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:49,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:49,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:49,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:49,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:28:49,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:28:49,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-27 01:28:49,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:49,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:49,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:28:49,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:28:49,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:50,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:50,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:50,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:50,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:50,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:50,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:50,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:28:50,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:50,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:50,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:50,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:50,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:50,044 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 01:28:50,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304300762] [2020-10-27 01:28:50,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:50,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:50,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418431216] [2020-10-27 01:28:50,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:50,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:50,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:50,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:50,046 INFO L87 Difference]: Start difference. First operand 22026 states and 32520 transitions. Second operand 4 states. [2020-10-27 01:28:50,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:50,719 INFO L93 Difference]: Finished difference Result 33038 states and 48651 transitions. [2020-10-27 01:28:50,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:50,720 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-10-27 01:28:50,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:50,743 INFO L225 Difference]: With dead ends: 33038 [2020-10-27 01:28:50,744 INFO L226 Difference]: Without dead ends: 22283 [2020-10-27 01:28:50,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:50,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22283 states. [2020-10-27 01:28:51,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22283 to 22282. [2020-10-27 01:28:51,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22282 states. [2020-10-27 01:28:51,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22282 states to 22282 states and 32520 transitions. [2020-10-27 01:28:51,380 INFO L78 Accepts]: Start accepts. Automaton has 22282 states and 32520 transitions. Word has length 36 [2020-10-27 01:28:51,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:51,381 INFO L481 AbstractCegarLoop]: Abstraction has 22282 states and 32520 transitions. [2020-10-27 01:28:51,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:51,381 INFO L276 IsEmpty]: Start isEmpty. Operand 22282 states and 32520 transitions. [2020-10-27 01:28:51,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:28:51,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:51,404 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] [2020-10-27 01:28:51,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:28:51,404 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:51,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:51,409 INFO L82 PathProgramCache]: Analyzing trace with hash -519839372, now seen corresponding path program 1 times [2020-10-27 01:28:51,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:51,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526126510] [2020-10-27 01:28:51,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:51,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:51,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:51,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:51,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:28:51,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:51,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 01:28:51,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:51,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:51,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 01:28:51,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:28:51,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:51,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:51,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:51,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:51,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:51,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:51,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:51,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:28:51,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:51,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:51,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:51,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:51,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:51,537 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 01:28:51,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526126510] [2020-10-27 01:28:51,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:51,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:51,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638880848] [2020-10-27 01:28:51,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:51,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:51,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:51,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:51,539 INFO L87 Difference]: Start difference. First operand 22282 states and 32520 transitions. Second operand 4 states. [2020-10-27 01:28:52,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:52,584 INFO L93 Difference]: Finished difference Result 65294 states and 94475 transitions. [2020-10-27 01:28:52,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:52,585 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-10-27 01:28:52,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:52,620 INFO L225 Difference]: With dead ends: 65294 [2020-10-27 01:28:52,620 INFO L226 Difference]: Without dead ends: 43531 [2020-10-27 01:28:52,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:52,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43531 states. [2020-10-27 01:28:53,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43531 to 43530. [2020-10-27 01:28:53,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43530 states. [2020-10-27 01:28:53,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43530 states to 43530 states and 61960 transitions. [2020-10-27 01:28:53,671 INFO L78 Accepts]: Start accepts. Automaton has 43530 states and 61960 transitions. Word has length 36 [2020-10-27 01:28:53,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:53,672 INFO L481 AbstractCegarLoop]: Abstraction has 43530 states and 61960 transitions. [2020-10-27 01:28:53,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:53,672 INFO L276 IsEmpty]: Start isEmpty. Operand 43530 states and 61960 transitions. [2020-10-27 01:28:53,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:28:53,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:53,697 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] [2020-10-27 01:28:53,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:28:53,697 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:53,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:53,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1169104370, now seen corresponding path program 1 times [2020-10-27 01:28:53,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:53,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242580814] [2020-10-27 01:28:53,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:53,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:53,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:53,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:53,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:28:53,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:53,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 01:28:53,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:53,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:53,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 01:28:53,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:28:53,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:53,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:53,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:53,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:53,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:53,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:53,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:53,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:28:53,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:53,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:53,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:53,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:53,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:53,804 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 01:28:53,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242580814] [2020-10-27 01:28:53,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:53,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:53,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990614863] [2020-10-27 01:28:53,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:53,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:53,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:53,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:53,806 INFO L87 Difference]: Start difference. First operand 43530 states and 61960 transitions. Second operand 4 states. [2020-10-27 01:28:55,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:55,293 INFO L93 Difference]: Finished difference Result 49678 states and 73227 transitions. [2020-10-27 01:28:55,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:55,294 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-10-27 01:28:55,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:55,350 INFO L225 Difference]: With dead ends: 49678 [2020-10-27 01:28:55,350 INFO L226 Difference]: Without dead ends: 49675 [2020-10-27 01:28:55,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:55,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49675 states. [2020-10-27 01:28:56,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49675 to 43530. [2020-10-27 01:28:56,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43530 states. [2020-10-27 01:28:56,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43530 states to 43530 states and 61448 transitions. [2020-10-27 01:28:56,288 INFO L78 Accepts]: Start accepts. Automaton has 43530 states and 61448 transitions. Word has length 36 [2020-10-27 01:28:56,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:56,288 INFO L481 AbstractCegarLoop]: Abstraction has 43530 states and 61448 transitions. [2020-10-27 01:28:56,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:56,288 INFO L276 IsEmpty]: Start isEmpty. Operand 43530 states and 61448 transitions. [2020-10-27 01:28:56,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:28:56,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:56,312 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:28:56,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:28:56,312 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:56,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:56,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1071501965, now seen corresponding path program 1 times [2020-10-27 01:28:56,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:56,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569369710] [2020-10-27 01:28:56,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:56,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:56,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:56,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:56,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:28:56,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:56,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-27 01:28:56,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:56,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:56,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 01:28:56,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:28:56,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:56,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:56,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:56,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:56,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:56,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:56,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:56,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-27 01:28:56,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:56,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:56,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:56,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:56,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:56,587 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 01:28:56,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569369710] [2020-10-27 01:28:56,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:56,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:56,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486235560] [2020-10-27 01:28:56,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:56,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:56,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:56,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:56,595 INFO L87 Difference]: Start difference. First operand 43530 states and 61448 transitions. Second operand 4 states. [2020-10-27 01:28:57,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:57,732 INFO L93 Difference]: Finished difference Result 75278 states and 108555 transitions. [2020-10-27 01:28:57,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:57,732 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-10-27 01:28:57,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:57,811 INFO L225 Difference]: With dead ends: 75278 [2020-10-27 01:28:57,811 INFO L226 Difference]: Without dead ends: 75275 [2020-10-27 01:28:57,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:57,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75275 states. [2020-10-27 01:28:59,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75275 to 65034. [2020-10-27 01:28:59,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65034 states. [2020-10-27 01:28:59,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65034 states to 65034 states and 89096 transitions. [2020-10-27 01:28:59,115 INFO L78 Accepts]: Start accepts. Automaton has 65034 states and 89096 transitions. Word has length 37 [2020-10-27 01:28:59,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:59,115 INFO L481 AbstractCegarLoop]: Abstraction has 65034 states and 89096 transitions. [2020-10-27 01:28:59,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:59,115 INFO L276 IsEmpty]: Start isEmpty. Operand 65034 states and 89096 transitions. [2020-10-27 01:28:59,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:28:59,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:59,166 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:28:59,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:28:59,166 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:59,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:59,167 INFO L82 PathProgramCache]: Analyzing trace with hash -617441777, now seen corresponding path program 1 times [2020-10-27 01:28:59,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:59,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967729657] [2020-10-27 01:28:59,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:59,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:59,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:59,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:59,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:28:59,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:59,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 01:28:59,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:59,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:59,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 01:28:59,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:28:59,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:59,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:59,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:59,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:59,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:59,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:59,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:59,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:28:59,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:59,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:59,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:59,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:59,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:59,281 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 01:28:59,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967729657] [2020-10-27 01:28:59,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:59,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:59,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755717204] [2020-10-27 01:28:59,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:59,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:59,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:59,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:59,283 INFO L87 Difference]: Start difference. First operand 65034 states and 89096 transitions. Second operand 4 states. [2020-10-27 01:29:00,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:00,956 INFO L93 Difference]: Finished difference Result 150030 states and 206859 transitions. [2020-10-27 01:29:00,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:29:00,956 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-10-27 01:29:00,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:01,054 INFO L225 Difference]: With dead ends: 150030 [2020-10-27 01:29:01,054 INFO L226 Difference]: Without dead ends: 85515 [2020-10-27 01:29:01,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:29:01,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85515 states. [2020-10-27 01:29:02,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85515 to 85514. [2020-10-27 01:29:02,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85514 states. [2020-10-27 01:29:03,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85514 states to 85514 states and 116744 transitions. [2020-10-27 01:29:03,206 INFO L78 Accepts]: Start accepts. Automaton has 85514 states and 116744 transitions. Word has length 37 [2020-10-27 01:29:03,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:03,206 INFO L481 AbstractCegarLoop]: Abstraction has 85514 states and 116744 transitions. [2020-10-27 01:29:03,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:29:03,207 INFO L276 IsEmpty]: Start isEmpty. Operand 85514 states and 116744 transitions. [2020-10-27 01:29:03,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:29:03,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:03,264 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] [2020-10-27 01:29:03,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:29:03,265 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:03,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:03,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1136513569, now seen corresponding path program 1 times [2020-10-27 01:29:03,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:03,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133902215] [2020-10-27 01:29:03,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:03,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:03,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:03,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:03,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:03,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:29:03,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:03,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-27 01:29:03,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:03,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:29:03,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 01:29:03,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:29:03,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:03,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:03,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:03,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:03,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:03,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:03,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:03,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:29:03,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:03,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:03,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:03,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:03,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:03,456 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 01:29:03,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133902215] [2020-10-27 01:29:03,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:29:03,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:29:03,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511752938] [2020-10-27 01:29:03,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:29:03,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:03,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:29:03,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:29:03,458 INFO L87 Difference]: Start difference. First operand 85514 states and 116744 transitions. Second operand 4 states. [2020-10-27 01:29:04,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:04,851 INFO L93 Difference]: Finished difference Result 129038 states and 176139 transitions. [2020-10-27 01:29:04,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:29:04,852 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-10-27 01:29:04,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:04,951 INFO L225 Difference]: With dead ends: 129038 [2020-10-27 01:29:04,952 INFO L226 Difference]: Without dead ends: 87051 [2020-10-27 01:29:05,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:29:05,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87051 states. [2020-10-27 01:29:06,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87051 to 87050. [2020-10-27 01:29:06,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87050 states. [2020-10-27 01:29:06,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87050 states to 87050 states and 117768 transitions. [2020-10-27 01:29:06,916 INFO L78 Accepts]: Start accepts. Automaton has 87050 states and 117768 transitions. Word has length 38 [2020-10-27 01:29:06,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:06,916 INFO L481 AbstractCegarLoop]: Abstraction has 87050 states and 117768 transitions. [2020-10-27 01:29:06,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:29:06,916 INFO L276 IsEmpty]: Start isEmpty. Operand 87050 states and 117768 transitions. [2020-10-27 01:29:06,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:29:06,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:06,956 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] [2020-10-27 01:29:06,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:29:06,956 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:06,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:06,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1954162019, now seen corresponding path program 1 times [2020-10-27 01:29:06,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:06,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417331036] [2020-10-27 01:29:06,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:06,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:06,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:07,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:07,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:29:07,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:07,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-27 01:29:07,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:07,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:29:07,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 01:29:07,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:29:07,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:07,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:07,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:07,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:07,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:07,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:07,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:07,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:29:07,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:07,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:07,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:07,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:07,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:07,089 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 01:29:07,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417331036] [2020-10-27 01:29:07,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:29:07,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:29:07,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288035912] [2020-10-27 01:29:07,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:29:07,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:07,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:29:07,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:29:07,092 INFO L87 Difference]: Start difference. First operand 87050 states and 117768 transitions. Second operand 4 states. [2020-10-27 01:29:09,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:09,207 INFO L93 Difference]: Finished difference Result 147470 states and 202763 transitions. [2020-10-27 01:29:09,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:29:09,207 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-10-27 01:29:09,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:09,367 INFO L225 Difference]: With dead ends: 147470 [2020-10-27 01:29:09,367 INFO L226 Difference]: Without dead ends: 147467 [2020-10-27 01:29:09,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:29:09,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147467 states. [2020-10-27 01:29:11,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147467 to 131082. [2020-10-27 01:29:11,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131082 states. [2020-10-27 01:29:12,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131082 states to 131082 states and 172040 transitions. [2020-10-27 01:29:12,151 INFO L78 Accepts]: Start accepts. Automaton has 131082 states and 172040 transitions. Word has length 38 [2020-10-27 01:29:12,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:12,151 INFO L481 AbstractCegarLoop]: Abstraction has 131082 states and 172040 transitions. [2020-10-27 01:29:12,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:29:12,151 INFO L276 IsEmpty]: Start isEmpty. Operand 131082 states and 172040 transitions. [2020-10-27 01:29:12,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:29:12,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:12,224 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] [2020-10-27 01:29:12,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:29:12,224 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:12,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:12,225 INFO L82 PathProgramCache]: Analyzing trace with hash 651861535, now seen corresponding path program 1 times [2020-10-27 01:29:12,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:12,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881809635] [2020-10-27 01:29:12,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:12,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:12,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:12,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:12,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:29:12,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:12,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-27 01:29:12,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:12,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:29:12,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 01:29:12,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:29:12,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:12,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:12,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:12,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:12,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:12,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:12,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:12,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:29:12,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:12,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:12,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:12,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:12,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:12,355 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 01:29:12,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881809635] [2020-10-27 01:29:12,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:29:12,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:29:12,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587025515] [2020-10-27 01:29:12,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:29:12,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:12,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:29:12,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:29:12,356 INFO L87 Difference]: Start difference. First operand 131082 states and 172040 transitions. Second operand 4 states. [2020-10-27 01:29:15,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:15,618 INFO L93 Difference]: Finished difference Result 299022 states and 393227 transitions. [2020-10-27 01:29:15,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:29:15,619 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-10-27 01:29:15,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:16,126 INFO L225 Difference]: With dead ends: 299022 [2020-10-27 01:29:16,126 INFO L226 Difference]: Without dead ends: 169995 [2020-10-27 01:29:16,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:29:16,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169995 states. [2020-10-27 01:29:19,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169995 to 169994. [2020-10-27 01:29:19,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169994 states. [2020-10-27 01:29:19,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169994 states to 169994 states and 221192 transitions. [2020-10-27 01:29:19,868 INFO L78 Accepts]: Start accepts. Automaton has 169994 states and 221192 transitions. Word has length 38 [2020-10-27 01:29:19,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:19,869 INFO L481 AbstractCegarLoop]: Abstraction has 169994 states and 221192 transitions. [2020-10-27 01:29:19,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:29:19,869 INFO L276 IsEmpty]: Start isEmpty. Operand 169994 states and 221192 transitions. [2020-10-27 01:29:19,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:29:19,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:19,944 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:19,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:29:19,944 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:19,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:19,945 INFO L82 PathProgramCache]: Analyzing trace with hash -442805990, now seen corresponding path program 1 times [2020-10-27 01:29:19,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:19,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798231135] [2020-10-27 01:29:19,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:19,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:19,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:19,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:20,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:20,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:29:20,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:20,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-27 01:29:20,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:20,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:29:20,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 01:29:20,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:29:20,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:20,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:20,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:20,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:20,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:20,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:20,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:20,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:29:20,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:20,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:20,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:20,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:20,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:20,112 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 01:29:20,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798231135] [2020-10-27 01:29:20,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:29:20,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:29:20,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521164727] [2020-10-27 01:29:20,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:29:20,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:20,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:29:20,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:29:20,117 INFO L87 Difference]: Start difference. First operand 169994 states and 221192 transitions. Second operand 4 states. [2020-10-27 01:29:23,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:23,187 INFO L93 Difference]: Finished difference Result 254990 states and 330763 transitions. [2020-10-27 01:29:23,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:29:23,188 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-10-27 01:29:23,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:23,425 INFO L225 Difference]: With dead ends: 254990 [2020-10-27 01:29:23,426 INFO L226 Difference]: Without dead ends: 172043 [2020-10-27 01:29:23,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:29:23,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172043 states. [2020-10-27 01:29:26,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172043 to 172042. [2020-10-27 01:29:26,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172042 states. [2020-10-27 01:29:27,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172042 states to 172042 states and 221192 transitions. [2020-10-27 01:29:27,284 INFO L78 Accepts]: Start accepts. Automaton has 172042 states and 221192 transitions. Word has length 39 [2020-10-27 01:29:27,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:27,284 INFO L481 AbstractCegarLoop]: Abstraction has 172042 states and 221192 transitions. [2020-10-27 01:29:27,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:29:27,284 INFO L276 IsEmpty]: Start isEmpty. Operand 172042 states and 221192 transitions. [2020-10-27 01:29:27,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:29:27,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:27,358 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:27,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:29:27,359 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:27,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:27,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1260454440, now seen corresponding path program 1 times [2020-10-27 01:29:27,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:27,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486729136] [2020-10-27 01:29:27,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:27,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:27,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:27,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:27,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:29:27,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:27,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 01:29:27,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:27,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:29:27,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 01:29:27,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:29:27,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:27,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:27,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:27,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:27,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:27,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:27,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:27,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:29:27,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:27,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:27,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:27,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:27,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:27,476 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 01:29:27,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486729136] [2020-10-27 01:29:27,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:29:27,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:29:27,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924854563] [2020-10-27 01:29:27,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:29:27,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:27,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:29:27,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:29:27,478 INFO L87 Difference]: Start difference. First operand 172042 states and 221192 transitions. Second operand 4 states. [2020-10-27 01:29:31,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:31,771 INFO L93 Difference]: Finished difference Result 286734 states and 372747 transitions. [2020-10-27 01:29:31,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:29:31,772 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-10-27 01:29:31,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:32,136 INFO L225 Difference]: With dead ends: 286734 [2020-10-27 01:29:32,136 INFO L226 Difference]: Without dead ends: 286731 [2020-10-27 01:29:32,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:29:32,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286731 states. [2020-10-27 01:29:36,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286731 to 262154. [2020-10-27 01:29:36,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262154 states. [2020-10-27 01:29:37,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262154 states to 262154 states and 327688 transitions. [2020-10-27 01:29:37,186 INFO L78 Accepts]: Start accepts. Automaton has 262154 states and 327688 transitions. Word has length 39 [2020-10-27 01:29:37,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:37,186 INFO L481 AbstractCegarLoop]: Abstraction has 262154 states and 327688 transitions. [2020-10-27 01:29:37,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:29:37,186 INFO L276 IsEmpty]: Start isEmpty. Operand 262154 states and 327688 transitions. [2020-10-27 01:29:37,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:29:37,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:37,827 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:29:37,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:29:37,828 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:37,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:37,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1345569114, now seen corresponding path program 1 times [2020-10-27 01:29:37,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:37,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73005708] [2020-10-27 01:29:37,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:37,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:37,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:37,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:37,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:29:37,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:37,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-27 01:29:37,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:37,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:29:37,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 01:29:37,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:29:37,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:37,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:37,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:37,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:37,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:37,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:37,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:37,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:29:37,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:37,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:37,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:37,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:37,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:37,963 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 01:29:37,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73005708] [2020-10-27 01:29:37,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:29:37,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:29:37,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922530951] [2020-10-27 01:29:37,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:29:37,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:37,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:29:37,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:29:37,964 INFO L87 Difference]: Start difference. First operand 262154 states and 327688 transitions. Second operand 4 states. [2020-10-27 01:29:44,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:44,179 INFO L93 Difference]: Finished difference Result 593934 states and 741387 transitions. [2020-10-27 01:29:44,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:29:44,180 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-10-27 01:29:44,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:44,694 INFO L225 Difference]: With dead ends: 593934 [2020-10-27 01:29:44,695 INFO L226 Difference]: Without dead ends: 335883 [2020-10-27 01:29:45,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:29:45,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335883 states. [2020-10-27 01:29:51,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335883 to 335882. [2020-10-27 01:29:51,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335882 states. [2020-10-27 01:29:52,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335882 states to 335882 states and 413704 transitions. [2020-10-27 01:29:52,871 INFO L78 Accepts]: Start accepts. Automaton has 335882 states and 413704 transitions. Word has length 39 [2020-10-27 01:29:52,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:29:52,871 INFO L481 AbstractCegarLoop]: Abstraction has 335882 states and 413704 transitions. [2020-10-27 01:29:52,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:29:52,872 INFO L276 IsEmpty]: Start isEmpty. Operand 335882 states and 413704 transitions. [2020-10-27 01:29:53,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:29:53,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:29:53,047 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] [2020-10-27 01:29:53,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:29:53,047 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:29:53,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:29:53,048 INFO L82 PathProgramCache]: Analyzing trace with hash -412696950, now seen corresponding path program 1 times [2020-10-27 01:29:53,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:29:53,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415801975] [2020-10-27 01:29:53,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:29:53,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:53,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:53,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:53,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:53,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:29:53,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:29:53,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-27 01:29:53,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:53,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:29:53,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 01:29:53,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:29:53,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:53,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:29:53,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:29:53,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:29:53,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:29:53,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:29:53,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:29:53,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:29:53,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:29:53,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:29:53,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:29:53,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:29:53,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:29:53,203 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 01:29:53,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415801975] [2020-10-27 01:29:53,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:29:53,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:29:53,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889606096] [2020-10-27 01:29:53,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:29:53,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:29:53,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:29:53,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:29:53,205 INFO L87 Difference]: Start difference. First operand 335882 states and 413704 transitions. Second operand 4 states. [2020-10-27 01:29:58,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:29:58,113 INFO L93 Difference]: Finished difference Result 503822 states and 618507 transitions. [2020-10-27 01:29:58,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:29:58,114 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2020-10-27 01:29:58,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:29:58,606 INFO L225 Difference]: With dead ends: 503822 [2020-10-27 01:29:58,607 INFO L226 Difference]: Without dead ends: 339979 [2020-10-27 01:29:58,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:29:59,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339979 states. [2020-10-27 01:30:05,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339979 to 339978. [2020-10-27 01:30:05,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339978 states. [2020-10-27 01:30:06,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339978 states to 339978 states and 413704 transitions. [2020-10-27 01:30:06,835 INFO L78 Accepts]: Start accepts. Automaton has 339978 states and 413704 transitions. Word has length 40 [2020-10-27 01:30:06,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:06,835 INFO L481 AbstractCegarLoop]: Abstraction has 339978 states and 413704 transitions. [2020-10-27 01:30:06,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:30:06,836 INFO L276 IsEmpty]: Start isEmpty. Operand 339978 states and 413704 transitions. [2020-10-27 01:30:07,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:30:07,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:07,008 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] [2020-10-27 01:30:07,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:30:07,008 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:07,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:07,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1230345400, now seen corresponding path program 1 times [2020-10-27 01:30:07,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:07,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255153449] [2020-10-27 01:30:07,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:07,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:07,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:07,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:07,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:30:07,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:07,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 01:30:07,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:07,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:30:07,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 01:30:07,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:30:07,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:07,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:07,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:07,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:07,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:07,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:07,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:07,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:30:07,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:07,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:07,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:07,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:07,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:07,113 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 01:30:07,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255153449] [2020-10-27 01:30:07,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:30:07,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:30:07,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394906309] [2020-10-27 01:30:07,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:30:07,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:07,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:30:07,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:30:07,114 INFO L87 Difference]: Start difference. First operand 339978 states and 413704 transitions. Second operand 4 states. [2020-10-27 01:30:14,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:14,939 INFO L93 Difference]: Finished difference Result 557070 states and 679947 transitions. [2020-10-27 01:30:14,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:30:14,940 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2020-10-27 01:30:14,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:15,741 INFO L225 Difference]: With dead ends: 557070 [2020-10-27 01:30:15,741 INFO L226 Difference]: Without dead ends: 557067 [2020-10-27 01:30:15,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:30:16,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557067 states. [2020-10-27 01:30:27,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557067 to 524298. [2020-10-27 01:30:27,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 524298 states. [2020-10-27 01:30:29,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524298 states to 524298 states and 622600 transitions. [2020-10-27 01:30:29,742 INFO L78 Accepts]: Start accepts. Automaton has 524298 states and 622600 transitions. Word has length 40 [2020-10-27 01:30:29,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:30:29,742 INFO L481 AbstractCegarLoop]: Abstraction has 524298 states and 622600 transitions. [2020-10-27 01:30:29,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:30:29,743 INFO L276 IsEmpty]: Start isEmpty. Operand 524298 states and 622600 transitions. [2020-10-27 01:30:30,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:30:30,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:30:30,125 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] [2020-10-27 01:30:30,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:30:30,125 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:30:30,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:30:30,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1375678154, now seen corresponding path program 1 times [2020-10-27 01:30:30,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:30:30,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007346524] [2020-10-27 01:30:30,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:30:30,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:30,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:30,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:30,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:30:30,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:30,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 01:30:30,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:30,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:30:30,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 01:30:30,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:30:30,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:30,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:30:30,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:30:30,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:30:30,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:30:30,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:30:30,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:30:30,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:30:30,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:30:30,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:30:30,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:30:30,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:30:30,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:30:30,223 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 01:30:30,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007346524] [2020-10-27 01:30:30,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:30:30,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:30:30,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057349521] [2020-10-27 01:30:30,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:30:30,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:30:30,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:30:30,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:30:30,225 INFO L87 Difference]: Start difference. First operand 524298 states and 622600 transitions. Second operand 4 states. [2020-10-27 01:30:40,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:30:40,599 INFO L93 Difference]: Finished difference Result 1179662 states and 1392651 transitions. [2020-10-27 01:30:40,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:30:40,599 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2020-10-27 01:30:40,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:30:42,249 INFO L225 Difference]: With dead ends: 1179662 [2020-10-27 01:30:42,250 INFO L226 Difference]: Without dead ends: 663563 [2020-10-27 01:30:42,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:30:42,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663563 states. [2020-10-27 01:30:59,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663563 to 663562. [2020-10-27 01:30:59,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 663562 states. [2020-10-27 01:31:02,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663562 states to 663562 states and 770056 transitions. [2020-10-27 01:31:02,370 INFO L78 Accepts]: Start accepts. Automaton has 663562 states and 770056 transitions. Word has length 40 [2020-10-27 01:31:02,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:02,370 INFO L481 AbstractCegarLoop]: Abstraction has 663562 states and 770056 transitions. [2020-10-27 01:31:02,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:31:02,370 INFO L276 IsEmpty]: Start isEmpty. Operand 663562 states and 770056 transitions. [2020-10-27 01:31:02,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:31:02,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:02,909 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] [2020-10-27 01:31:02,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:31:02,909 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:02,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:02,910 INFO L82 PathProgramCache]: Analyzing trace with hash 520693861, now seen corresponding path program 1 times [2020-10-27 01:31:02,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:02,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864884275] [2020-10-27 01:31:02,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:02,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:02,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:02,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:03,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:03,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:31:03,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:31:03,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-27 01:31:03,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:03,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:31:03,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 01:31:03,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:31:03,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:03,205 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-10-27 01:31:03,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:03,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:03,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:03,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:03,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:03,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:03,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:31:03,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:03,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:03,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:03,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:03,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:03,218 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 01:31:03,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864884275] [2020-10-27 01:31:03,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:31:03,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:31:03,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217166742] [2020-10-27 01:31:03,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:31:03,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:03,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:31:03,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:31:03,221 INFO L87 Difference]: Start difference. First operand 663562 states and 770056 transitions. Second operand 4 states. [2020-10-27 01:31:13,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:31:13,550 INFO L93 Difference]: Finished difference Result 995342 states and 1150987 transitions. [2020-10-27 01:31:13,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:31:13,551 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-10-27 01:31:13,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:31:15,216 INFO L225 Difference]: With dead ends: 995342 [2020-10-27 01:31:15,216 INFO L226 Difference]: Without dead ends: 671755 [2020-10-27 01:31:15,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:31:15,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671755 states. [2020-10-27 01:31:29,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671755 to 671754. [2020-10-27 01:31:29,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 671754 states. [2020-10-27 01:31:31,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671754 states to 671754 states and 770056 transitions. [2020-10-27 01:31:31,896 INFO L78 Accepts]: Start accepts. Automaton has 671754 states and 770056 transitions. Word has length 41 [2020-10-27 01:31:31,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:31:31,897 INFO L481 AbstractCegarLoop]: Abstraction has 671754 states and 770056 transitions. [2020-10-27 01:31:31,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:31:31,897 INFO L276 IsEmpty]: Start isEmpty. Operand 671754 states and 770056 transitions. [2020-10-27 01:31:32,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:31:32,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:31:32,313 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] [2020-10-27 01:31:32,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:31:32,313 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:31:32,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:31:32,314 INFO L82 PathProgramCache]: Analyzing trace with hash -296954589, now seen corresponding path program 1 times [2020-10-27 01:31:32,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:31:32,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979805314] [2020-10-27 01:31:32,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:31:32,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:32,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:32,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:32,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:31:32,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:32,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-27 01:31:32,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:32,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:31:32,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 01:31:32,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:31:32,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:32,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:31:32,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:31:32,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:31:32,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:31:32,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:31:32,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:31:32,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:31:32,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:31:32,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:31:32,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:31:32,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:31:32,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:31:32,434 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 01:31:32,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979805314] [2020-10-27 01:31:32,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:31:32,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:31:32,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073470040] [2020-10-27 01:31:32,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:31:32,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:31:32,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:31:32,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:31:32,436 INFO L87 Difference]: Start difference. First operand 671754 states and 770056 transitions. Second operand 4 states.