/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/array-examples/standard_copy1_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:14:01,788 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:14:01,792 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:14:01,831 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:14:01,831 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:14:01,833 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:14:01,836 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:14:01,839 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:14:01,842 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:14:01,843 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:14:01,845 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:14:01,847 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:14:01,847 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:14:01,849 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:14:01,850 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:14:01,853 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:14:01,854 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:14:01,855 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:14:01,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:14:01,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:14:01,862 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:14:01,864 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:14:01,866 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:14:01,867 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:14:01,881 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:14:01,881 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:14:01,882 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:14:01,884 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:14:01,884 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:14:01,886 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:14:01,886 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:14:01,888 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:14:01,889 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:14:01,890 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:14:01,891 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:14:01,892 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:14:01,893 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:14:01,893 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:14:01,893 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:14:01,895 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:14:01,896 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:14:01,897 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 [2020-10-26 19:14:01,926 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:14:01,927 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:14:01,929 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:14:01,929 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:14:01,929 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:14:01,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:14:01,930 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:14:01,930 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:14:01,931 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:14:01,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:14:01,931 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:14:01,931 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:14:01,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:14:01,932 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:14:01,932 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:14:01,932 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:14:01,933 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:14:01,933 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:14:01,933 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:14:01,934 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:14:01,934 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:14:01,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:14:01,934 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:14:01,935 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:14:01,935 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:14:01,935 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:14:01,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:14:01,936 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:14:01,936 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:14:01,936 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:14:02,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:14:02,392 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:14:02,396 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:14:02,398 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:14:02,399 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:14:02,403 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy1_ground-2.i [2020-10-26 19:14:02,497 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/76097f6f5/79e75a9fe5f34da9a64029af12879242/FLAG3742a93c7 [2020-10-26 19:14:03,181 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:14:03,182 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy1_ground-2.i [2020-10-26 19:14:03,191 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/76097f6f5/79e75a9fe5f34da9a64029af12879242/FLAG3742a93c7 [2020-10-26 19:14:03,541 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/76097f6f5/79e75a9fe5f34da9a64029af12879242 [2020-10-26 19:14:03,544 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:14:03,552 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:14:03,553 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:14:03,554 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:14:03,558 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:14:03,559 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:14:03" (1/1) ... [2020-10-26 19:14:03,562 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e9dbdfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:14:03, skipping insertion in model container [2020-10-26 19:14:03,563 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:14:03" (1/1) ... [2020-10-26 19:14:03,571 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:14:03,587 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:14:03,762 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:14:03,772 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:14:03,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:14:03,813 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:14:03,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:14:03 WrapperNode [2020-10-26 19:14:03,814 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:14:03,815 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:14:03,815 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:14:03,816 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:14:03,830 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:14:03" (1/1) ... [2020-10-26 19:14:03,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:14:03" (1/1) ... [2020-10-26 19:14:03,839 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:14:03" (1/1) ... [2020-10-26 19:14:03,839 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:14:03" (1/1) ... [2020-10-26 19:14:03,848 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:14:03" (1/1) ... [2020-10-26 19:14:03,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:14:03" (1/1) ... [2020-10-26 19:14:03,855 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:14:03" (1/1) ... [2020-10-26 19:14:03,857 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:14:03,858 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:14:03,859 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:14:03,859 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:14:03,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:14:03" (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 [2020-10-26 19:14:03,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:14:03,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:14:03,947 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:14:03,948 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:14:03,948 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:14:03,948 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:14:03,948 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:14:03,948 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:14:03,948 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:14:03,948 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:14:03,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:14:03,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:14:03,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:14:03,949 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:14:03,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:14:03,950 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:14:03,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:14:03,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:14:03,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:14:03,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:14:04,255 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:14:04,256 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-26 19:14:04,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:14:04 BoogieIcfgContainer [2020-10-26 19:14:04,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:14:04,260 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:14:04,260 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:14:04,265 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:14:04,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:14:03" (1/3) ... [2020-10-26 19:14:04,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d9ba04b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:14:04, skipping insertion in model container [2020-10-26 19:14:04,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:14:03" (2/3) ... [2020-10-26 19:14:04,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d9ba04b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:14:04, skipping insertion in model container [2020-10-26 19:14:04,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:14:04" (3/3) ... [2020-10-26 19:14:04,271 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy1_ground-2.i [2020-10-26 19:14:04,289 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:14:04,295 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:14:04,316 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:14:04,382 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:14:04,383 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:14:04,383 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:14:04,383 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:14:04,383 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:14:04,384 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:14:04,384 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:14:04,384 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:14:04,432 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-26 19:14:04,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-26 19:14:04,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:04,441 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:04,441 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:04,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:04,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1906025394, now seen corresponding path program 1 times [2020-10-26 19:14:04,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:04,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175330298] [2020-10-26 19:14:04,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:04,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:04,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:04,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:05,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:05,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 19:14:05,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:05,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 328 [2020-10-26 19:14:05,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:05,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:05,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:14:05,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:05,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-26 19:14:05,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:05,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:05,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:05,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:05,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:05,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:05,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 19:14:05,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:05,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:05,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:05,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:05,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:05,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:05,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175330298] [2020-10-26 19:14:05,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:14:05,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:14:05,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070080234] [2020-10-26 19:14:05,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:14:05,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:05,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:14:05,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:14:05,288 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-10-26 19:14:05,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:05,377 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-10-26 19:14:05,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:14:05,379 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-26 19:14:05,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:05,389 INFO L225 Difference]: With dead ends: 53 [2020-10-26 19:14:05,389 INFO L226 Difference]: Without dead ends: 24 [2020-10-26 19:14:05,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:14:05,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-26 19:14:05,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-26 19:14:05,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-26 19:14:05,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-26 19:14:05,443 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2020-10-26 19:14:05,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:05,443 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-26 19:14:05,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:14:05,444 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-26 19:14:05,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-26 19:14:05,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:05,445 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:05,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:14:05,445 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:05,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:05,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1754426942, now seen corresponding path program 1 times [2020-10-26 19:14:05,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:05,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968520572] [2020-10-26 19:14:05,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:05,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:05,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:05,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:05,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:05,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 19:14:05,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:05,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 226 [2020-10-26 19:14:05,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:05,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:14:05,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:05,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:14:05,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:14:05,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:05,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:05,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:05,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:05,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:05,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:05,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 19:14:05,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:05,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:05,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:05,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:05,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:05,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:05,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968520572] [2020-10-26 19:14:05,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:14:05,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:14:05,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152423845] [2020-10-26 19:14:05,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:14:05,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:05,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:14:05,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:14:05,767 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 4 states. [2020-10-26 19:14:05,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:05,847 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-10-26 19:14:05,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:14:05,848 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-26 19:14:05,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:05,849 INFO L225 Difference]: With dead ends: 42 [2020-10-26 19:14:05,849 INFO L226 Difference]: Without dead ends: 26 [2020-10-26 19:14:05,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:14:05,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-26 19:14:05,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-26 19:14:05,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-26 19:14:05,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-26 19:14:05,860 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 17 [2020-10-26 19:14:05,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:05,860 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-26 19:14:05,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:14:05,860 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-26 19:14:05,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-26 19:14:05,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:05,862 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:05,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:14:05,862 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:05,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:05,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1825545696, now seen corresponding path program 1 times [2020-10-26 19:14:05,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:05,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351471501] [2020-10-26 19:14:05,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:05,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:05,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:05,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:06,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:06,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-26 19:14:06,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:06,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-10-26 19:14:06,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:06,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:14:06,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:06,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:14:06,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:06,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:06,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:06,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:06,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:06,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:06,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:06,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 19:14:06,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:06,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:06,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:06,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:06,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:06,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:06,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351471501] [2020-10-26 19:14:06,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:06,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:14:06,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713496702] [2020-10-26 19:14:06,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:14:06,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:06,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:14:06,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:14:06,214 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 5 states. [2020-10-26 19:14:06,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:06,313 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-10-26 19:14:06,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:14:06,314 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-26 19:14:06,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:06,315 INFO L225 Difference]: With dead ends: 44 [2020-10-26 19:14:06,315 INFO L226 Difference]: Without dead ends: 28 [2020-10-26 19:14:06,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:14:06,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-26 19:14:06,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-26 19:14:06,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-26 19:14:06,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-26 19:14:06,325 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 19 [2020-10-26 19:14:06,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:06,326 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-26 19:14:06,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:14:06,326 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-26 19:14:06,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-26 19:14:06,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:06,327 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:06,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:14:06,328 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:06,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:06,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1451191554, now seen corresponding path program 2 times [2020-10-26 19:14:06,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:06,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853498449] [2020-10-26 19:14:06,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:06,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:06,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:06,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:06,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:06,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-26 19:14:06,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:06,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 238 [2020-10-26 19:14:06,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:06,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:14:06,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:06,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:14:06,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:06,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:06,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:06,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:06,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:06,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:06,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:06,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:14:06,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:06,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:06,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:06,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:06,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:06,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:06,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853498449] [2020-10-26 19:14:06,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:06,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:14:06,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51241534] [2020-10-26 19:14:06,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:14:06,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:06,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:14:06,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:14:06,659 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 6 states. [2020-10-26 19:14:06,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:06,775 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-10-26 19:14:06,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:14:06,776 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-26 19:14:06,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:06,777 INFO L225 Difference]: With dead ends: 46 [2020-10-26 19:14:06,777 INFO L226 Difference]: Without dead ends: 30 [2020-10-26 19:14:06,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:14:06,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-26 19:14:06,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-26 19:14:06,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-26 19:14:06,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-26 19:14:06,785 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 21 [2020-10-26 19:14:06,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:06,786 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-26 19:14:06,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:14:06,786 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-26 19:14:06,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-26 19:14:06,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:06,787 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:06,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:14:06,787 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:06,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:06,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1820853340, now seen corresponding path program 3 times [2020-10-26 19:14:06,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:06,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785293002] [2020-10-26 19:14:06,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:06,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:06,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:06,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:07,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:07,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 19:14:07,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:07,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 307 [2020-10-26 19:14:07,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:07,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:14:07,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:07,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:14:07,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:07,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:07,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:07,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:07,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:07,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:07,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:07,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:14:07,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:07,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:07,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:07,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:07,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:07,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:07,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785293002] [2020-10-26 19:14:07,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:07,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:14:07,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869560229] [2020-10-26 19:14:07,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:14:07,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:07,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:14:07,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:14:07,186 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 7 states. [2020-10-26 19:14:07,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:07,277 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-10-26 19:14:07,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:14:07,277 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-26 19:14:07,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:07,278 INFO L225 Difference]: With dead ends: 48 [2020-10-26 19:14:07,278 INFO L226 Difference]: Without dead ends: 32 [2020-10-26 19:14:07,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:14:07,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-26 19:14:07,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-26 19:14:07,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-26 19:14:07,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-26 19:14:07,286 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 23 [2020-10-26 19:14:07,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:07,287 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-26 19:14:07,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:14:07,287 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-26 19:14:07,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 19:14:07,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:07,288 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:07,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:14:07,288 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:07,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:07,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1955031494, now seen corresponding path program 4 times [2020-10-26 19:14:07,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:07,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569434648] [2020-10-26 19:14:07,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:07,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:07,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:07,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:07,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:07,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 19:14:07,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:07,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 472 [2020-10-26 19:14:07,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:07,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:14:07,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:07,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:14:07,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:07,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:07,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:07,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:07,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:07,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:07,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:07,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:14:07,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:07,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:07,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:07,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:07,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:07,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:07,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569434648] [2020-10-26 19:14:07,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:07,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:14:07,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840485766] [2020-10-26 19:14:07,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:14:07,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:07,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:14:07,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:14:07,874 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 8 states. [2020-10-26 19:14:07,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:07,972 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-10-26 19:14:07,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:14:07,972 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-26 19:14:07,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:07,973 INFO L225 Difference]: With dead ends: 50 [2020-10-26 19:14:07,973 INFO L226 Difference]: Without dead ends: 34 [2020-10-26 19:14:07,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:14:07,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-26 19:14:07,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-26 19:14:07,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-26 19:14:07,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-26 19:14:07,981 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 25 [2020-10-26 19:14:07,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:07,981 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-26 19:14:07,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:14:07,981 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-26 19:14:07,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 19:14:07,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:07,982 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:07,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:14:07,983 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:07,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:07,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1332991848, now seen corresponding path program 5 times [2020-10-26 19:14:07,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:07,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110128910] [2020-10-26 19:14:07,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:07,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:08,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:08,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:08,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:08,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-26 19:14:08,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:08,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 502 [2020-10-26 19:14:08,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:08,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:14:08,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:08,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:14:08,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:08,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:08,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:08,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:08,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:08,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:08,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:08,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:14:08,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:08,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:08,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:08,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:08,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:08,593 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:08,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110128910] [2020-10-26 19:14:08,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:08,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:14:08,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772023405] [2020-10-26 19:14:08,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:14:08,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:08,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:14:08,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:14:08,596 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 9 states. [2020-10-26 19:14:08,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:08,773 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2020-10-26 19:14:08,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:14:08,774 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-26 19:14:08,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:08,775 INFO L225 Difference]: With dead ends: 52 [2020-10-26 19:14:08,775 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 19:14:08,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:14:08,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 19:14:08,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-26 19:14:08,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-26 19:14:08,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-26 19:14:08,782 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 27 [2020-10-26 19:14:08,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:08,783 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-26 19:14:08,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:14:08,783 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-26 19:14:08,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 19:14:08,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:08,785 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:08,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:14:08,785 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:08,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:08,786 INFO L82 PathProgramCache]: Analyzing trace with hash -553346186, now seen corresponding path program 6 times [2020-10-26 19:14:08,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:08,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5788057] [2020-10-26 19:14:08,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:08,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:08,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:08,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:09,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:09,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 19:14:09,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:09,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 779 [2020-10-26 19:14:09,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:09,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:14:09,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:09,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:14:09,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:09,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:09,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:09,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:09,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:09,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:09,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:09,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:14:09,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:09,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:09,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:09,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:09,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:09,691 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:09,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5788057] [2020-10-26 19:14:09,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:09,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:14:09,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308162197] [2020-10-26 19:14:09,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:14:09,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:09,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:14:09,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:14:09,694 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 10 states. [2020-10-26 19:14:09,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:09,804 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2020-10-26 19:14:09,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:14:09,805 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-26 19:14:09,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:09,806 INFO L225 Difference]: With dead ends: 54 [2020-10-26 19:14:09,806 INFO L226 Difference]: Without dead ends: 38 [2020-10-26 19:14:09,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:14:09,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-26 19:14:09,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-26 19:14:09,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-26 19:14:09,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-26 19:14:09,813 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 29 [2020-10-26 19:14:09,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:09,813 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-26 19:14:09,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:14:09,813 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-26 19:14:09,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-26 19:14:09,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:09,814 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:09,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:14:09,815 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:09,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:09,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1361825492, now seen corresponding path program 7 times [2020-10-26 19:14:09,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:09,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300669089] [2020-10-26 19:14:09,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:09,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:09,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:09,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:10,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:10,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-26 19:14:10,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:10,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 912 [2020-10-26 19:14:10,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:10,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:14:10,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:10,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:14:10,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:10,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:10,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:10,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:10,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:10,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:10,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:14:10,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:10,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:10,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:10,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:10,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:10,865 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:10,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300669089] [2020-10-26 19:14:10,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:10,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:14:10,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822764339] [2020-10-26 19:14:10,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:14:10,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:10,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:14:10,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:14:10,868 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 11 states. [2020-10-26 19:14:10,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:10,986 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-10-26 19:14:10,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:14:10,987 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-26 19:14:10,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:10,988 INFO L225 Difference]: With dead ends: 56 [2020-10-26 19:14:10,988 INFO L226 Difference]: Without dead ends: 40 [2020-10-26 19:14:10,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:14:10,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-26 19:14:10,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-26 19:14:10,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-26 19:14:10,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-26 19:14:10,995 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 31 [2020-10-26 19:14:10,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:10,995 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-26 19:14:10,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:14:10,995 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-26 19:14:10,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 19:14:10,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:10,996 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:10,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:14:10,997 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:10,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:10,997 INFO L82 PathProgramCache]: Analyzing trace with hash -699161934, now seen corresponding path program 8 times [2020-10-26 19:14:10,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:10,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130184594] [2020-10-26 19:14:10,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:11,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:11,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:11,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:12,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:12,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:14:12,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:12,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1266 [2020-10-26 19:14:12,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:12,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:14:12,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:12,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:14:12,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:12,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:12,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:12,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:12,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:12,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:12,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:12,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:14:12,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:12,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:12,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:12,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:12,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:12,407 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:12,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130184594] [2020-10-26 19:14:12,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:12,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:14:12,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93625956] [2020-10-26 19:14:12,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:14:12,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:12,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:14:12,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:14:12,410 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 12 states. [2020-10-26 19:14:12,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:12,509 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2020-10-26 19:14:12,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:14:12,509 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-26 19:14:12,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:12,510 INFO L225 Difference]: With dead ends: 58 [2020-10-26 19:14:12,510 INFO L226 Difference]: Without dead ends: 42 [2020-10-26 19:14:12,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:14:12,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-26 19:14:12,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-26 19:14:12,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-26 19:14:12,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-26 19:14:12,517 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 33 [2020-10-26 19:14:12,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:12,517 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-26 19:14:12,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:14:12,517 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-26 19:14:12,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-26 19:14:12,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:12,518 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:12,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:14:12,519 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:12,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:12,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1328154864, now seen corresponding path program 9 times [2020-10-26 19:14:12,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:12,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467488313] [2020-10-26 19:14:12,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:12,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:12,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:12,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:14,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:14,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-26 19:14:14,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:14,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1712 [2020-10-26 19:14:14,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:14,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:14:14,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:14,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:14:14,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:14,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:14,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:14,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:14,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:14,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:14,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:14,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:14:14,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:14,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:14,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:14,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:14,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:14,395 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:14,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467488313] [2020-10-26 19:14:14,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:14,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:14:14,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95733642] [2020-10-26 19:14:14,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:14:14,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:14,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:14:14,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:14:14,398 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 13 states. [2020-10-26 19:14:14,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:14,505 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2020-10-26 19:14:14,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:14:14,505 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-26 19:14:14,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:14,506 INFO L225 Difference]: With dead ends: 60 [2020-10-26 19:14:14,506 INFO L226 Difference]: Without dead ends: 44 [2020-10-26 19:14:14,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:14:14,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-26 19:14:14,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-26 19:14:14,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-26 19:14:14,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-26 19:14:14,513 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 35 [2020-10-26 19:14:14,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:14,513 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-26 19:14:14,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:14:14,513 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-26 19:14:14,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:14:14,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:14,514 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:14,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:14:14,515 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:14,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:14,515 INFO L82 PathProgramCache]: Analyzing trace with hash -199971858, now seen corresponding path program 10 times [2020-10-26 19:14:14,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:14,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080256052] [2020-10-26 19:14:14,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:14,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:14,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:14,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:16,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:16,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 19:14:16,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:16,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1755 [2020-10-26 19:14:16,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:16,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:14:16,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:16,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:14:16,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:16,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:16,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:16,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:16,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:16,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:16,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:16,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:14:16,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:16,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:16,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:16,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:16,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:16,456 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:16,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080256052] [2020-10-26 19:14:16,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:16,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:14:16,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401057967] [2020-10-26 19:14:16,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:14:16,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:16,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:14:16,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:14:16,459 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 14 states. [2020-10-26 19:14:16,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:16,603 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2020-10-26 19:14:16,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:14:16,604 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-10-26 19:14:16,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:16,605 INFO L225 Difference]: With dead ends: 62 [2020-10-26 19:14:16,605 INFO L226 Difference]: Without dead ends: 46 [2020-10-26 19:14:16,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:14:16,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-26 19:14:16,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-26 19:14:16,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-26 19:14:16,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-26 19:14:16,611 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 37 [2020-10-26 19:14:16,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:16,612 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-26 19:14:16,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:14:16,612 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-26 19:14:16,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-26 19:14:16,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:16,613 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:16,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:14:16,613 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:16,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:16,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1652138316, now seen corresponding path program 11 times [2020-10-26 19:14:16,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:16,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968593986] [2020-10-26 19:14:16,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:16,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:16,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:16,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:18,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:18,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 19:14:18,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:18,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1950 [2020-10-26 19:14:18,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:18,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:14:18,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:18,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:14:18,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:18,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:18,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:18,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:18,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:18,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:18,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:18,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:14:18,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:18,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:18,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:18,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:18,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:18,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968593986] [2020-10-26 19:14:18,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:18,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:14:18,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819487941] [2020-10-26 19:14:18,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:14:18,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:18,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:14:18,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:14:18,798 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 15 states. [2020-10-26 19:14:18,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:18,985 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2020-10-26 19:14:18,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:14:18,986 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-26 19:14:18,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:18,987 INFO L225 Difference]: With dead ends: 64 [2020-10-26 19:14:18,987 INFO L226 Difference]: Without dead ends: 48 [2020-10-26 19:14:18,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:14:18,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-26 19:14:18,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-26 19:14:18,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-26 19:14:18,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-26 19:14:18,997 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 39 [2020-10-26 19:14:18,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:18,999 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-26 19:14:19,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:14:19,000 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-26 19:14:19,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-26 19:14:19,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:19,001 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:19,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:14:19,001 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:19,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:19,002 INFO L82 PathProgramCache]: Analyzing trace with hash -881412310, now seen corresponding path program 12 times [2020-10-26 19:14:19,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:19,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69965513] [2020-10-26 19:14:19,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:19,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:19,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:19,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:21,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:21,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 19:14:21,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:21,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2464 [2020-10-26 19:14:21,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:21,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:14:21,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:21,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:14:21,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:21,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:21,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:21,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:21,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:21,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:21,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:21,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:14:21,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:21,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:21,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:21,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:21,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:21,744 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:21,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69965513] [2020-10-26 19:14:21,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:21,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:14:21,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230628411] [2020-10-26 19:14:21,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:14:21,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:21,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:14:21,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:14:21,747 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 16 states. [2020-10-26 19:14:21,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:21,913 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2020-10-26 19:14:21,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:14:21,913 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2020-10-26 19:14:21,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:21,914 INFO L225 Difference]: With dead ends: 66 [2020-10-26 19:14:21,914 INFO L226 Difference]: Without dead ends: 50 [2020-10-26 19:14:21,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:14:21,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-26 19:14:21,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-26 19:14:21,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-26 19:14:21,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-10-26 19:14:21,925 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 41 [2020-10-26 19:14:21,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:21,926 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-10-26 19:14:21,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:14:21,926 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-10-26 19:14:21,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:14:21,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:21,928 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:21,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:14:21,928 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:21,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:21,929 INFO L82 PathProgramCache]: Analyzing trace with hash -377107064, now seen corresponding path program 13 times [2020-10-26 19:14:21,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:21,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117959919] [2020-10-26 19:14:21,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:21,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:21,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:21,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:24,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:24,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-26 19:14:24,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:24,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2477 [2020-10-26 19:14:24,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:24,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:14:24,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:24,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:14:24,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:24,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:24,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:24,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:24,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:24,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:24,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:24,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:14:24,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:24,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:24,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:24,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:24,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:24,682 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:24,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117959919] [2020-10-26 19:14:24,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:24,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:14:24,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168071194] [2020-10-26 19:14:24,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:14:24,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:24,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:14:24,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:14:24,686 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 17 states. [2020-10-26 19:14:24,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:24,922 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2020-10-26 19:14:24,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:14:24,923 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2020-10-26 19:14:24,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:24,924 INFO L225 Difference]: With dead ends: 68 [2020-10-26 19:14:24,924 INFO L226 Difference]: Without dead ends: 52 [2020-10-26 19:14:24,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:14:24,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-26 19:14:24,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-26 19:14:24,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-26 19:14:24,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-26 19:14:24,931 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 43 [2020-10-26 19:14:24,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:24,932 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-26 19:14:24,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:14:24,932 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-26 19:14:24,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:14:24,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:24,933 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:24,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:14:24,933 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:24,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:24,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1071070106, now seen corresponding path program 14 times [2020-10-26 19:14:24,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:24,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114149922] [2020-10-26 19:14:24,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:24,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:24,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:24,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:27,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:27,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:14:27,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:27,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2391 [2020-10-26 19:14:27,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:27,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:14:27,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:27,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:14:27,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:27,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:27,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:27,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:27,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:27,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:27,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:27,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:14:27,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:27,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:27,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:27,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:27,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:27,624 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:27,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114149922] [2020-10-26 19:14:27,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:27,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:14:27,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937128049] [2020-10-26 19:14:27,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:14:27,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:27,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:14:27,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:14:27,627 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 18 states. [2020-10-26 19:14:27,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:27,813 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2020-10-26 19:14:27,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:14:27,814 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-26 19:14:27,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:27,815 INFO L225 Difference]: With dead ends: 70 [2020-10-26 19:14:27,815 INFO L226 Difference]: Without dead ends: 54 [2020-10-26 19:14:27,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:14:27,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-26 19:14:27,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-26 19:14:27,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-26 19:14:27,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-26 19:14:27,824 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 45 [2020-10-26 19:14:27,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:27,825 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-26 19:14:27,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:14:27,825 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-26 19:14:27,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 19:14:27,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:27,826 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:27,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:14:27,827 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:27,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:27,828 INFO L82 PathProgramCache]: Analyzing trace with hash 2045344708, now seen corresponding path program 15 times [2020-10-26 19:14:27,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:27,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703013208] [2020-10-26 19:14:27,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:27,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:27,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:27,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:30,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:30,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:14:30,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:30,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2695 [2020-10-26 19:14:30,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:30,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:14:30,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:30,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:14:30,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-26 19:14:30,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:30,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:30,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:30,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:30,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:30,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:30,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:30,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:30,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:30,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:30,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:30,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:30,857 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:30,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703013208] [2020-10-26 19:14:30,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:30,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:14:30,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403494977] [2020-10-26 19:14:30,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:14:30,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:30,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:14:30,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:14:30,859 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 19 states. [2020-10-26 19:14:31,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:31,059 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2020-10-26 19:14:31,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:14:31,060 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2020-10-26 19:14:31,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:31,060 INFO L225 Difference]: With dead ends: 72 [2020-10-26 19:14:31,061 INFO L226 Difference]: Without dead ends: 56 [2020-10-26 19:14:31,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:14:31,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-26 19:14:31,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-26 19:14:31,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-26 19:14:31,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-26 19:14:31,066 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 47 [2020-10-26 19:14:31,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:31,067 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-26 19:14:31,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:14:31,067 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-26 19:14:31,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-26 19:14:31,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:31,068 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:31,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:14:31,068 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:31,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:31,069 INFO L82 PathProgramCache]: Analyzing trace with hash -967191646, now seen corresponding path program 16 times [2020-10-26 19:14:31,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:31,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181770205] [2020-10-26 19:14:31,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:31,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:31,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:31,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:34,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:34,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 19:14:34,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:34,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3020 [2020-10-26 19:14:34,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:34,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:14:34,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:34,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:14:34,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:34,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:34,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:34,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:34,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:34,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:34,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:34,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:14:34,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:34,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:34,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:34,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:34,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:14:34,509 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:34,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181770205] [2020-10-26 19:14:34,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:34,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:14:34,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878615398] [2020-10-26 19:14:34,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:14:34,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:34,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:14:34,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:14:34,523 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 20 states. [2020-10-26 19:14:34,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:34,802 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2020-10-26 19:14:34,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:14:34,803 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 49 [2020-10-26 19:14:34,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:34,804 INFO L225 Difference]: With dead ends: 74 [2020-10-26 19:14:34,804 INFO L226 Difference]: Without dead ends: 58 [2020-10-26 19:14:34,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:14:34,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-26 19:14:34,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-26 19:14:34,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-26 19:14:34,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-26 19:14:34,814 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 49 [2020-10-26 19:14:34,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:34,814 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-26 19:14:34,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:14:34,814 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-26 19:14:34,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-26 19:14:34,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:34,815 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:34,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:14:34,816 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:34,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:34,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1206670336, now seen corresponding path program 17 times [2020-10-26 19:14:34,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:34,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121960673] [2020-10-26 19:14:34,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:34,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:34,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:34,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:38,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:38,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-26 19:14:38,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:38,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3184 [2020-10-26 19:14:38,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:38,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:14:38,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:38,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:14:38,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:38,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:38,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:38,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:38,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:38,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:38,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:38,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:14:38,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:38,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:38,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:38,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:38,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:38,358 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:38,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121960673] [2020-10-26 19:14:38,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:38,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:14:38,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524479708] [2020-10-26 19:14:38,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:14:38,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:38,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:14:38,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:14:38,362 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 21 states. [2020-10-26 19:14:38,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:38,533 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2020-10-26 19:14:38,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:14:38,534 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51 [2020-10-26 19:14:38,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:38,535 INFO L225 Difference]: With dead ends: 76 [2020-10-26 19:14:38,535 INFO L226 Difference]: Without dead ends: 60 [2020-10-26 19:14:38,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:14:38,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-26 19:14:38,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-26 19:14:38,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-26 19:14:38,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-26 19:14:38,545 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 51 [2020-10-26 19:14:38,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:38,545 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-26 19:14:38,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:14:38,545 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-26 19:14:38,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:14:38,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:38,546 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:38,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:14:38,547 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:38,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:38,547 INFO L82 PathProgramCache]: Analyzing trace with hash 582542558, now seen corresponding path program 18 times [2020-10-26 19:14:38,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:38,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151477742] [2020-10-26 19:14:38,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:38,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:38,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:38,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:42,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:42,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:14:42,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:42,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3454 [2020-10-26 19:14:42,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:42,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:14:42,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:42,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:14:42,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:42,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:42,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:42,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:42,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:42,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:42,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:42,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:14:42,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:42,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:42,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:42,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:42,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:42,407 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:42,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151477742] [2020-10-26 19:14:42,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:42,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:14:42,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449333208] [2020-10-26 19:14:42,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:14:42,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:42,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:14:42,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:14:42,409 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 22 states. [2020-10-26 19:14:42,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:42,576 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2020-10-26 19:14:42,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:14:42,576 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 53 [2020-10-26 19:14:42,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:42,577 INFO L225 Difference]: With dead ends: 78 [2020-10-26 19:14:42,577 INFO L226 Difference]: Without dead ends: 62 [2020-10-26 19:14:42,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:14:42,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-26 19:14:42,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-26 19:14:42,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-26 19:14:42,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2020-10-26 19:14:42,583 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 53 [2020-10-26 19:14:42,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:42,583 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2020-10-26 19:14:42,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:14:42,584 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2020-10-26 19:14:42,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 19:14:42,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:42,584 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:42,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:14:42,584 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:42,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:42,585 INFO L82 PathProgramCache]: Analyzing trace with hash 2029215292, now seen corresponding path program 19 times [2020-10-26 19:14:42,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:42,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138170602] [2020-10-26 19:14:42,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:42,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:42,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:42,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:46,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:46,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 19:14:46,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:46,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3569 [2020-10-26 19:14:46,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:46,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:14:46,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:46,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:14:46,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:46,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:46,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:46,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:46,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:46,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:46,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:46,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:14:46,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:46,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:46,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:46,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:46,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:46,550 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:46,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138170602] [2020-10-26 19:14:46,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:46,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:14:46,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234839179] [2020-10-26 19:14:46,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:14:46,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:46,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:14:46,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:14:46,555 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 23 states. [2020-10-26 19:14:46,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:46,782 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2020-10-26 19:14:46,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:14:46,783 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 55 [2020-10-26 19:14:46,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:46,784 INFO L225 Difference]: With dead ends: 80 [2020-10-26 19:14:46,784 INFO L226 Difference]: Without dead ends: 64 [2020-10-26 19:14:46,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:14:46,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-26 19:14:46,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-26 19:14:46,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-26 19:14:46,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-10-26 19:14:46,790 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 55 [2020-10-26 19:14:46,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:46,790 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-10-26 19:14:46,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:14:46,790 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-10-26 19:14:46,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-26 19:14:46,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:46,791 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:46,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:14:46,791 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:46,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:46,792 INFO L82 PathProgramCache]: Analyzing trace with hash 712308762, now seen corresponding path program 20 times [2020-10-26 19:14:46,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:46,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274184514] [2020-10-26 19:14:46,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:46,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:46,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:46,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:50,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:50,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 19:14:50,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:50,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3762 [2020-10-26 19:14:50,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:50,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:14:50,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:50,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:14:50,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:50,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:50,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:50,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:50,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:50,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:50,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:50,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:50,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:50,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:50,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:50,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:50,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:50,999 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:50,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274184514] [2020-10-26 19:14:50,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:50,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:14:51,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091956974] [2020-10-26 19:14:51,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:14:51,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:51,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:14:51,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:14:51,001 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 24 states. [2020-10-26 19:14:51,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:51,257 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2020-10-26 19:14:51,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:14:51,258 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 57 [2020-10-26 19:14:51,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:51,259 INFO L225 Difference]: With dead ends: 82 [2020-10-26 19:14:51,259 INFO L226 Difference]: Without dead ends: 66 [2020-10-26 19:14:51,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:14:51,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-26 19:14:51,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-26 19:14:51,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-26 19:14:51,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-26 19:14:51,264 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 57 [2020-10-26 19:14:51,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:51,265 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-26 19:14:51,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:14:51,265 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-26 19:14:51,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-26 19:14:51,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:51,266 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:51,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:14:51,266 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:51,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:51,267 INFO L82 PathProgramCache]: Analyzing trace with hash -2114481544, now seen corresponding path program 21 times [2020-10-26 19:14:51,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:51,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738314160] [2020-10-26 19:14:51,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:51,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:51,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:51,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:55,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:55,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-26 19:14:55,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:55,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4626 [2020-10-26 19:14:55,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:55,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:14:55,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:55,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:14:55,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:56,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:56,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:56,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:56,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:56,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:56,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:56,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:14:56,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:56,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:56,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:56,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:56,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:56,334 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:56,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738314160] [2020-10-26 19:14:56,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:56,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:14:56,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803877990] [2020-10-26 19:14:56,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:14:56,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:56,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:14:56,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:14:56,345 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 25 states. [2020-10-26 19:14:56,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:56,572 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2020-10-26 19:14:56,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:14:56,572 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 59 [2020-10-26 19:14:56,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:56,574 INFO L225 Difference]: With dead ends: 84 [2020-10-26 19:14:56,574 INFO L226 Difference]: Without dead ends: 68 [2020-10-26 19:14:56,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:14:56,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-26 19:14:56,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-26 19:14:56,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-26 19:14:56,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-10-26 19:14:56,587 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 59 [2020-10-26 19:14:56,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:56,587 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-10-26 19:14:56,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:14:56,588 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-10-26 19:14:56,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:14:56,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:56,589 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:56,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:14:56,590 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:56,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:56,590 INFO L82 PathProgramCache]: Analyzing trace with hash 54332758, now seen corresponding path program 22 times [2020-10-26 19:14:56,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:56,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364864646] [2020-10-26 19:14:56,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:56,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:56,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:56,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:01,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:01,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 19:15:01,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:01,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:15:01,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:01,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:15:01,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:01,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:15:01,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:02,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:02,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:02,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:02,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:02,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:02,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:02,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:02,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:02,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:02,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:02,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:02,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:02,107 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:02,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364864646] [2020-10-26 19:15:02,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:02,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:15:02,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100770413] [2020-10-26 19:15:02,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:15:02,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:02,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:15:02,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:15:02,110 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 26 states. [2020-10-26 19:15:02,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:02,359 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2020-10-26 19:15:02,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:15:02,360 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 61 [2020-10-26 19:15:02,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:02,361 INFO L225 Difference]: With dead ends: 86 [2020-10-26 19:15:02,361 INFO L226 Difference]: Without dead ends: 70 [2020-10-26 19:15:02,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:15:02,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-26 19:15:02,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-26 19:15:02,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-26 19:15:02,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-26 19:15:02,369 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 61 [2020-10-26 19:15:02,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:02,369 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-26 19:15:02,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:15:02,369 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-26 19:15:02,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-26 19:15:02,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:02,370 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:02,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:15:02,370 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:02,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:02,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1225738420, now seen corresponding path program 23 times [2020-10-26 19:15:02,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:02,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183728510] [2020-10-26 19:15:02,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:02,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:02,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:02,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:07,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:07,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 19:15:07,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:07,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-26 19:15:07,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:07,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:15:07,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:07,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:15:07,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:07,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:07,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:07,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:07,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:07,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:07,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:07,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:07,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:07,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:07,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:07,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:07,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:07,927 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:07,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183728510] [2020-10-26 19:15:07,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:07,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:15:07,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225819138] [2020-10-26 19:15:07,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:15:07,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:07,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:15:07,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:15:07,929 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 27 states. [2020-10-26 19:15:08,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:08,221 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2020-10-26 19:15:08,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:15:08,222 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 63 [2020-10-26 19:15:08,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:08,223 INFO L225 Difference]: With dead ends: 88 [2020-10-26 19:15:08,223 INFO L226 Difference]: Without dead ends: 72 [2020-10-26 19:15:08,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:15:08,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-26 19:15:08,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-26 19:15:08,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-26 19:15:08,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-26 19:15:08,228 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 63 [2020-10-26 19:15:08,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:08,228 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-26 19:15:08,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:15:08,229 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-26 19:15:08,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-26 19:15:08,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:08,229 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:08,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:15:08,230 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:08,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:08,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1665148050, now seen corresponding path program 24 times [2020-10-26 19:15:08,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:08,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611497440] [2020-10-26 19:15:08,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:08,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:08,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:08,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:13,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:13,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 19:15:13,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:13,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-26 19:15:13,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:13,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:15:13,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:13,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:15:13,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:13,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:13,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:13,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:13,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:13,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:13,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:13,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:15:13,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:13,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:13,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:13,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:13,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:13,825 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:13,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611497440] [2020-10-26 19:15:13,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:13,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:15:13,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049635038] [2020-10-26 19:15:13,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:15:13,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:13,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:15:13,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:15:13,828 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 28 states. [2020-10-26 19:15:14,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:14,111 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2020-10-26 19:15:14,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:15:14,112 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 65 [2020-10-26 19:15:14,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:14,113 INFO L225 Difference]: With dead ends: 90 [2020-10-26 19:15:14,113 INFO L226 Difference]: Without dead ends: 74 [2020-10-26 19:15:14,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:15:14,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-26 19:15:14,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-26 19:15:14,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-26 19:15:14,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-10-26 19:15:14,119 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 65 [2020-10-26 19:15:14,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:14,119 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-10-26 19:15:14,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:15:14,119 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-10-26 19:15:14,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 19:15:14,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:14,120 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:14,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:15:14,121 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:14,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:14,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1263959824, now seen corresponding path program 25 times [2020-10-26 19:15:14,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:14,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256736370] [2020-10-26 19:15:14,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:14,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:14,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:14,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:19,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:19,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 19:15:19,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:19,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5081 [2020-10-26 19:15:19,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:19,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:15:19,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:19,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:15:19,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:19,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:19,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:19,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:19,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:19,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:19,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:19,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:19,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:19,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:19,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:19,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:19,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:19,821 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:19,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256736370] [2020-10-26 19:15:19,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:19,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:15:19,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578193610] [2020-10-26 19:15:19,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:15:19,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:19,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:15:19,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:15:19,824 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 29 states. [2020-10-26 19:15:20,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:20,045 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2020-10-26 19:15:20,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:15:20,046 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 67 [2020-10-26 19:15:20,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:20,047 INFO L225 Difference]: With dead ends: 92 [2020-10-26 19:15:20,047 INFO L226 Difference]: Without dead ends: 76 [2020-10-26 19:15:20,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:15:20,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-26 19:15:20,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-26 19:15:20,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-26 19:15:20,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-10-26 19:15:20,053 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 67 [2020-10-26 19:15:20,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:20,054 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-10-26 19:15:20,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:15:20,054 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-10-26 19:15:20,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-26 19:15:20,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:20,054 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:20,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:15:20,055 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:20,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:20,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1361919438, now seen corresponding path program 26 times [2020-10-26 19:15:20,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:20,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096333547] [2020-10-26 19:15:20,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:20,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:20,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:20,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:25,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:25,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:15:25,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:25,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-26 19:15:25,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:25,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:15:25,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:25,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:15:25,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:25,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:25,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:25,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:25,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:25,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:25,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:25,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:25,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:25,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:25,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:25,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:25,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:25,748 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:25,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096333547] [2020-10-26 19:15:25,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:25,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:15:25,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265575788] [2020-10-26 19:15:25,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:15:25,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:25,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:15:25,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:15:25,750 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 30 states. [2020-10-26 19:15:26,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:26,065 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2020-10-26 19:15:26,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:15:26,066 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 69 [2020-10-26 19:15:26,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:26,067 INFO L225 Difference]: With dead ends: 94 [2020-10-26 19:15:26,067 INFO L226 Difference]: Without dead ends: 78 [2020-10-26 19:15:26,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:15:26,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-26 19:15:26,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-26 19:15:26,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-26 19:15:26,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-10-26 19:15:26,075 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 69 [2020-10-26 19:15:26,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:26,076 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-10-26 19:15:26,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:15:26,076 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-10-26 19:15:26,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-26 19:15:26,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:26,076 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:26,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:15:26,077 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:26,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:26,081 INFO L82 PathProgramCache]: Analyzing trace with hash -608879828, now seen corresponding path program 27 times [2020-10-26 19:15:26,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:26,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59354550] [2020-10-26 19:15:26,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:26,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:26,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:26,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:31,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:31,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 19:15:31,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:31,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5121 [2020-10-26 19:15:31,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:31,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:15:31,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:31,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:15:31,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:31,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:31,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:31,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:31,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:31,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:31,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:31,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:15:31,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:31,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:31,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:31,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:31,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:31,894 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:31,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59354550] [2020-10-26 19:15:31,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:31,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:15:31,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267924744] [2020-10-26 19:15:31,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:15:31,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:31,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:15:31,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:15:31,896 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 31 states. [2020-10-26 19:15:32,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:32,091 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2020-10-26 19:15:32,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:15:32,092 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 71 [2020-10-26 19:15:32,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:32,093 INFO L225 Difference]: With dead ends: 96 [2020-10-26 19:15:32,093 INFO L226 Difference]: Without dead ends: 80 [2020-10-26 19:15:32,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:15:32,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-26 19:15:32,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-26 19:15:32,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-26 19:15:32,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-10-26 19:15:32,099 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 71 [2020-10-26 19:15:32,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:32,099 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-10-26 19:15:32,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:15:32,100 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-10-26 19:15:32,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-26 19:15:32,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:32,100 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:32,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:15:32,101 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:32,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:32,101 INFO L82 PathProgramCache]: Analyzing trace with hash -466396918, now seen corresponding path program 28 times [2020-10-26 19:15:32,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:32,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580069180] [2020-10-26 19:15:32,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:32,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:32,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:32,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:37,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:37,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 19:15:37,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:37,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-26 19:15:37,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:37,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:15:37,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:37,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:15:37,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:37,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:37,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:37,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:37,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:37,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:37,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:37,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:15:37,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:37,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:37,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:37,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:37,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:37,899 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:37,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580069180] [2020-10-26 19:15:37,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:37,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:15:37,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799355303] [2020-10-26 19:15:37,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:15:37,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:37,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:15:37,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:15:37,901 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 32 states. [2020-10-26 19:15:38,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:38,257 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2020-10-26 19:15:38,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:15:38,257 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 73 [2020-10-26 19:15:38,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:38,258 INFO L225 Difference]: With dead ends: 98 [2020-10-26 19:15:38,258 INFO L226 Difference]: Without dead ends: 82 [2020-10-26 19:15:38,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:15:38,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-26 19:15:38,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-26 19:15:38,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-26 19:15:38,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-10-26 19:15:38,263 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 73 [2020-10-26 19:15:38,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:38,264 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-10-26 19:15:38,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:15:38,264 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-10-26 19:15:38,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-26 19:15:38,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:38,265 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:38,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:15:38,265 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:38,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:38,265 INFO L82 PathProgramCache]: Analyzing trace with hash -979273880, now seen corresponding path program 29 times [2020-10-26 19:15:38,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:38,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523610865] [2020-10-26 19:15:38,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:38,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:38,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:38,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:43,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:43,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-26 19:15:43,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:43,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-26 19:15:43,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:43,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:15:43,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:43,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:15:43,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:44,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:44,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:44,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:44,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:44,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:44,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:44,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:15:44,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:44,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:44,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:44,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:44,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:44,094 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:44,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523610865] [2020-10-26 19:15:44,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:44,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:15:44,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717799424] [2020-10-26 19:15:44,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:15:44,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:44,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:15:44,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:15:44,099 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 33 states. [2020-10-26 19:15:44,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:44,384 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2020-10-26 19:15:44,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:15:44,384 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 75 [2020-10-26 19:15:44,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:44,385 INFO L225 Difference]: With dead ends: 100 [2020-10-26 19:15:44,386 INFO L226 Difference]: Without dead ends: 84 [2020-10-26 19:15:44,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:15:44,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-26 19:15:44,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-26 19:15:44,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-26 19:15:44,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-26 19:15:44,392 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 75 [2020-10-26 19:15:44,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:44,392 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-26 19:15:44,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:15:44,393 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-26 19:15:44,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-26 19:15:44,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:44,394 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:44,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:15:44,394 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:44,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:44,394 INFO L82 PathProgramCache]: Analyzing trace with hash 67204678, now seen corresponding path program 30 times [2020-10-26 19:15:44,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:44,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230804748] [2020-10-26 19:15:44,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:44,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:44,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:44,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:49,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:49,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 19:15:49,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:49,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-26 19:15:49,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:49,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:15:49,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:49,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:15:49,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:50,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:50,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:50,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:50,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:50,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:50,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:50,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 19:15:50,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:50,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:50,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:50,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:50,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:50,273 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:50,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230804748] [2020-10-26 19:15:50,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:50,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:15:50,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464803452] [2020-10-26 19:15:50,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:15:50,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:50,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:15:50,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:15:50,277 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 34 states. [2020-10-26 19:15:50,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:50,522 INFO L93 Difference]: Finished difference Result 102 states and 106 transitions. [2020-10-26 19:15:50,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:15:50,522 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 77 [2020-10-26 19:15:50,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:50,523 INFO L225 Difference]: With dead ends: 102 [2020-10-26 19:15:50,524 INFO L226 Difference]: Without dead ends: 86 [2020-10-26 19:15:50,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:15:50,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-26 19:15:50,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-26 19:15:50,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-26 19:15:50,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-10-26 19:15:50,530 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 77 [2020-10-26 19:15:50,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:50,530 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-10-26 19:15:50,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:15:50,530 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-10-26 19:15:50,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-26 19:15:50,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:50,531 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:50,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:15:50,532 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:50,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:50,532 INFO L82 PathProgramCache]: Analyzing trace with hash 710751652, now seen corresponding path program 31 times [2020-10-26 19:15:50,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:50,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988311171] [2020-10-26 19:15:50,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:50,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:50,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:50,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:55,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:55,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-26 19:15:55,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:55,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5186 [2020-10-26 19:15:55,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:55,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:15:55,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:55,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 19:15:55,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:56,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:56,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:56,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:56,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:56,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:56,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:56,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:15:56,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:56,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:56,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:56,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:56,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:56,572 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:56,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988311171] [2020-10-26 19:15:56,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:56,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:15:56,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891805038] [2020-10-26 19:15:56,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:15:56,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:56,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:15:56,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:15:56,574 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 35 states. [2020-10-26 19:15:56,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:56,803 INFO L93 Difference]: Finished difference Result 104 states and 108 transitions. [2020-10-26 19:15:56,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:15:56,803 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 79 [2020-10-26 19:15:56,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:56,805 INFO L225 Difference]: With dead ends: 104 [2020-10-26 19:15:56,805 INFO L226 Difference]: Without dead ends: 88 [2020-10-26 19:15:56,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:15:56,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-26 19:15:56,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-26 19:15:56,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-26 19:15:56,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-10-26 19:15:56,812 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 79 [2020-10-26 19:15:56,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:56,812 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-10-26 19:15:56,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:15:56,812 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-10-26 19:15:56,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-26 19:15:56,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:56,813 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:56,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:15:56,813 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:56,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:56,814 INFO L82 PathProgramCache]: Analyzing trace with hash 684103042, now seen corresponding path program 32 times [2020-10-26 19:15:56,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:56,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340699044] [2020-10-26 19:15:56,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:56,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:56,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:56,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:01,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:01,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 19:16:01,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:01,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-26 19:16:01,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:01,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:16:01,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:01,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-26 19:16:01,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:02,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:02,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:02,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:02,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:02,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:02,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:02,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:16:02,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:02,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:02,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:02,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:02,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:02,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:16:02,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340699044] [2020-10-26 19:16:02,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:02,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:16:02,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919864543] [2020-10-26 19:16:02,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:16:02,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:02,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:16:02,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:16:02,773 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 36 states. [2020-10-26 19:16:03,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:03,003 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2020-10-26 19:16:03,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:16:03,004 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 81 [2020-10-26 19:16:03,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:03,006 INFO L225 Difference]: With dead ends: 106 [2020-10-26 19:16:03,006 INFO L226 Difference]: Without dead ends: 90 [2020-10-26 19:16:03,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:16:03,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-26 19:16:03,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-26 19:16:03,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-26 19:16:03,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2020-10-26 19:16:03,012 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 81 [2020-10-26 19:16:03,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:03,012 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2020-10-26 19:16:03,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:16:03,012 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2020-10-26 19:16:03,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-26 19:16:03,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:03,013 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:03,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:16:03,013 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:03,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:03,014 INFO L82 PathProgramCache]: Analyzing trace with hash 844592608, now seen corresponding path program 33 times [2020-10-26 19:16:03,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:03,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724251130] [2020-10-26 19:16:03,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:03,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:03,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:03,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:08,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:08,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-26 19:16:08,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:08,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-26 19:16:08,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:08,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:16:08,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:08,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-26 19:16:08,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:08,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:08,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:08,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:08,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:08,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:08,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:08,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:08,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:08,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:08,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:08,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:08,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:08,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:16:08,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724251130] [2020-10-26 19:16:08,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:08,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:16:08,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263673769] [2020-10-26 19:16:08,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:16:08,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:08,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:16:08,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:16:08,978 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 37 states. [2020-10-26 19:16:09,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:09,261 INFO L93 Difference]: Finished difference Result 108 states and 112 transitions. [2020-10-26 19:16:09,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:16:09,261 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 83 [2020-10-26 19:16:09,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:09,263 INFO L225 Difference]: With dead ends: 108 [2020-10-26 19:16:09,263 INFO L226 Difference]: Without dead ends: 92 [2020-10-26 19:16:09,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:16:09,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-26 19:16:09,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-26 19:16:09,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-26 19:16:09,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2020-10-26 19:16:09,269 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 83 [2020-10-26 19:16:09,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:09,269 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2020-10-26 19:16:09,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:16:09,269 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2020-10-26 19:16:09,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-26 19:16:09,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:09,270 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:09,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:16:09,270 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:09,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:09,271 INFO L82 PathProgramCache]: Analyzing trace with hash 456242878, now seen corresponding path program 34 times [2020-10-26 19:16:09,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:09,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917455826] [2020-10-26 19:16:09,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:09,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:09,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:09,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:14,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:14,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-26 19:16:14,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:14,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:16:14,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:14,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:16:14,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:14,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 19:16:14,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:15,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:15,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:15,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:15,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:15,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:15,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:15,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:15,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:15,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:15,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:15,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:15,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:16:15,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917455826] [2020-10-26 19:16:15,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:15,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:16:15,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37597894] [2020-10-26 19:16:15,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:16:15,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:15,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:16:15,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:16:15,299 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 38 states. [2020-10-26 19:16:15,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:15,662 INFO L93 Difference]: Finished difference Result 110 states and 114 transitions. [2020-10-26 19:16:15,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:16:15,663 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 85 [2020-10-26 19:16:15,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:15,664 INFO L225 Difference]: With dead ends: 110 [2020-10-26 19:16:15,664 INFO L226 Difference]: Without dead ends: 94 [2020-10-26 19:16:15,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:16:15,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-26 19:16:15,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-26 19:16:15,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-26 19:16:15,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2020-10-26 19:16:15,671 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 85 [2020-10-26 19:16:15,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:15,671 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2020-10-26 19:16:15,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:16:15,672 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2020-10-26 19:16:15,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-26 19:16:15,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:15,673 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:15,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:16:15,673 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:15,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:15,673 INFO L82 PathProgramCache]: Analyzing trace with hash 914307100, now seen corresponding path program 35 times [2020-10-26 19:16:15,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:15,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42206006] [2020-10-26 19:16:15,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:15,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:15,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:15,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:20,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:20,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-26 19:16:20,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:20,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5126 [2020-10-26 19:16:20,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:20,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:16:20,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:20,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-26 19:16:20,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:21,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:21,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:21,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:21,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:21,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:21,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:21,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:21,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:21,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:21,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:21,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:21,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:21,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:16:21,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42206006] [2020-10-26 19:16:21,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:21,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:16:21,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417117172] [2020-10-26 19:16:21,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:16:21,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:21,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:16:21,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:16:21,888 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand 39 states. [2020-10-26 19:16:22,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:22,301 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2020-10-26 19:16:22,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:16:22,303 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 87 [2020-10-26 19:16:22,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:22,317 INFO L225 Difference]: With dead ends: 112 [2020-10-26 19:16:22,317 INFO L226 Difference]: Without dead ends: 96 [2020-10-26 19:16:22,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:16:22,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-26 19:16:22,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-26 19:16:22,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-26 19:16:22,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2020-10-26 19:16:22,323 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 87 [2020-10-26 19:16:22,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:22,324 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2020-10-26 19:16:22,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:16:22,324 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2020-10-26 19:16:22,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-26 19:16:22,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:22,325 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:22,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:16:22,325 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:22,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:22,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1267607046, now seen corresponding path program 36 times [2020-10-26 19:16:22,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:22,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323723785] [2020-10-26 19:16:22,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:22,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:22,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:22,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:27,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:27,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-26 19:16:27,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:27,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:16:27,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:27,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:16:27,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:27,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 19:16:27,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:28,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:28,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:28,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:28,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:28,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:28,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:28,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:28,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:28,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:28,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:28,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:28,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:28,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:16:28,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323723785] [2020-10-26 19:16:28,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:28,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-26 19:16:28,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821961828] [2020-10-26 19:16:28,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-26 19:16:28,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:28,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-26 19:16:28,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:16:28,459 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 40 states. [2020-10-26 19:16:28,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:28,805 INFO L93 Difference]: Finished difference Result 114 states and 118 transitions. [2020-10-26 19:16:28,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:16:28,806 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 89 [2020-10-26 19:16:28,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:28,807 INFO L225 Difference]: With dead ends: 114 [2020-10-26 19:16:28,808 INFO L226 Difference]: Without dead ends: 98 [2020-10-26 19:16:28,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:16:28,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-26 19:16:28,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-26 19:16:28,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-26 19:16:28,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2020-10-26 19:16:28,815 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 89 [2020-10-26 19:16:28,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:28,815 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2020-10-26 19:16:28,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-26 19:16:28,815 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2020-10-26 19:16:28,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-26 19:16:28,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:28,816 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:28,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:16:28,817 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:28,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:28,817 INFO L82 PathProgramCache]: Analyzing trace with hash -2143060904, now seen corresponding path program 37 times [2020-10-26 19:16:28,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:28,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74675106] [2020-10-26 19:16:28,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:28,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:28,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:28,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:33,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:33,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 19:16:33,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:33,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5141 [2020-10-26 19:16:33,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:33,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-26 19:16:33,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:33,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 19:16:33,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:35,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:35,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:35,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:35,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:35,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:35,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:35,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:35,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:35,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:35,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:35,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:35,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:35,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:16:35,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74675106] [2020-10-26 19:16:35,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:35,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:16:35,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991241192] [2020-10-26 19:16:35,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:16:35,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:35,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:16:35,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:16:35,168 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 41 states. [2020-10-26 19:16:35,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:35,597 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2020-10-26 19:16:35,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:16:35,598 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 91 [2020-10-26 19:16:35,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:35,599 INFO L225 Difference]: With dead ends: 116 [2020-10-26 19:16:35,599 INFO L226 Difference]: Without dead ends: 100 [2020-10-26 19:16:35,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:16:35,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-26 19:16:35,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-26 19:16:35,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-26 19:16:35,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2020-10-26 19:16:35,607 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 91 [2020-10-26 19:16:35,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:35,607 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2020-10-26 19:16:35,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:16:35,607 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2020-10-26 19:16:35,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-26 19:16:35,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:35,608 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:35,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:16:35,609 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:35,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:35,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1640628426, now seen corresponding path program 38 times [2020-10-26 19:16:35,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:35,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937353316] [2020-10-26 19:16:35,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:35,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:35,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:35,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:40,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:40,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-26 19:16:40,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:40,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5122 [2020-10-26 19:16:40,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:40,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-26 19:16:40,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:40,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 19:16:40,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:41,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:41,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:41,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:41,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:41,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:41,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:41,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:41,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:41,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:41,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:41,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:41,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:41,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:16:41,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937353316] [2020-10-26 19:16:41,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:41,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-26 19:16:41,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377592339] [2020-10-26 19:16:41,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-26 19:16:41,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:41,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-26 19:16:41,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:16:41,979 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 42 states. [2020-10-26 19:16:42,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:42,429 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2020-10-26 19:16:42,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-26 19:16:42,435 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 93 [2020-10-26 19:16:42,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:42,436 INFO L225 Difference]: With dead ends: 118 [2020-10-26 19:16:42,436 INFO L226 Difference]: Without dead ends: 102 [2020-10-26 19:16:42,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:16:42,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-26 19:16:42,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-10-26 19:16:42,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-26 19:16:42,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2020-10-26 19:16:42,442 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 93 [2020-10-26 19:16:42,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:42,443 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2020-10-26 19:16:42,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-26 19:16:42,443 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2020-10-26 19:16:42,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-26 19:16:42,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:42,444 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:42,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-26 19:16:42,444 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:42,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:42,444 INFO L82 PathProgramCache]: Analyzing trace with hash 160645780, now seen corresponding path program 39 times [2020-10-26 19:16:42,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:42,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964348598] [2020-10-26 19:16:42,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:42,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:42,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:42,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:47,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:47,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-26 19:16:47,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:47,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5062 [2020-10-26 19:16:47,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:47,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-26 19:16:47,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:47,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 19:16:47,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:48,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:48,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:48,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:48,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:48,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:48,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:48,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:16:48,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:48,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:48,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:48,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:48,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:48,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:16:48,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964348598] [2020-10-26 19:16:48,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:48,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-26 19:16:48,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979310910] [2020-10-26 19:16:48,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-26 19:16:48,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:48,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-26 19:16:48,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:16:48,822 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 43 states. [2020-10-26 19:16:49,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:49,204 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2020-10-26 19:16:49,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-26 19:16:49,205 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 95 [2020-10-26 19:16:49,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:49,206 INFO L225 Difference]: With dead ends: 120 [2020-10-26 19:16:49,206 INFO L226 Difference]: Without dead ends: 104 [2020-10-26 19:16:49,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:16:49,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-26 19:16:49,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-26 19:16:49,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-26 19:16:49,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2020-10-26 19:16:49,213 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 95 [2020-10-26 19:16:49,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:49,213 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2020-10-26 19:16:49,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-26 19:16:49,213 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2020-10-26 19:16:49,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-26 19:16:49,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:49,214 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:49,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-26 19:16:49,215 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:49,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:49,215 INFO L82 PathProgramCache]: Analyzing trace with hash 313337458, now seen corresponding path program 40 times [2020-10-26 19:16:49,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:49,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528273789] [2020-10-26 19:16:49,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:49,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:49,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:49,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:54,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:54,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-26 19:16:54,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:54,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-26 19:16:54,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:54,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-26 19:16:54,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:54,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-26 19:16:54,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:55,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:55,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:55,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:55,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:55,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:55,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:55,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:55,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:55,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:55,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:55,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:55,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:55,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:16:55,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528273789] [2020-10-26 19:16:55,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:55,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-26 19:16:55,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59472840] [2020-10-26 19:16:55,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-26 19:16:55,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:55,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-26 19:16:55,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:16:55,653 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand 44 states. [2020-10-26 19:16:55,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:55,994 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2020-10-26 19:16:55,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-26 19:16:55,995 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 97 [2020-10-26 19:16:55,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:55,996 INFO L225 Difference]: With dead ends: 122 [2020-10-26 19:16:55,997 INFO L226 Difference]: Without dead ends: 106 [2020-10-26 19:16:55,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:16:55,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-26 19:16:56,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-10-26 19:16:56,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-26 19:16:56,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2020-10-26 19:16:56,003 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 97 [2020-10-26 19:16:56,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:56,003 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2020-10-26 19:16:56,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-26 19:16:56,003 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2020-10-26 19:16:56,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-26 19:16:56,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:56,004 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:56,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-26 19:16:56,004 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:56,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:56,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1021151952, now seen corresponding path program 41 times [2020-10-26 19:16:56,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:56,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572998433] [2020-10-26 19:16:56,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:56,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:56,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:56,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:01,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:01,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-26 19:17:01,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:17:01,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5149 [2020-10-26 19:17:01,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:01,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-26 19:17:01,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:01,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-26 19:17:01,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:02,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:02,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:02,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:02,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:02,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:02,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:02,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:17:02,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:02,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:02,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:02,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:02,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:02,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:02,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572998433] [2020-10-26 19:17:02,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:02,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-26 19:17:02,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187476049] [2020-10-26 19:17:02,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-26 19:17:02,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:02,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-26 19:17:02,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:17:02,594 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 45 states. [2020-10-26 19:17:02,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:02,953 INFO L93 Difference]: Finished difference Result 124 states and 128 transitions. [2020-10-26 19:17:02,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-26 19:17:02,954 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 99 [2020-10-26 19:17:02,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:02,956 INFO L225 Difference]: With dead ends: 124 [2020-10-26 19:17:02,956 INFO L226 Difference]: Without dead ends: 108 [2020-10-26 19:17:02,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:17:02,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-26 19:17:02,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-10-26 19:17:02,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-26 19:17:02,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 109 transitions. [2020-10-26 19:17:02,962 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 109 transitions. Word has length 99 [2020-10-26 19:17:02,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:02,963 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 109 transitions. [2020-10-26 19:17:02,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-26 19:17:02,963 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 109 transitions. [2020-10-26 19:17:02,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-26 19:17:02,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:02,964 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:02,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-26 19:17:02,964 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:02,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:02,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1668919378, now seen corresponding path program 42 times [2020-10-26 19:17:02,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:02,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604450684] [2020-10-26 19:17:02,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:03,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:03,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:08,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:08,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-26 19:17:08,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:17:08,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-26 19:17:08,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:08,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-26 19:17:08,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:08,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-26 19:17:08,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:09,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:09,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:09,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:09,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:09,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:09,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:09,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:17:09,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:09,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:09,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:09,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:09,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:09,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:09,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604450684] [2020-10-26 19:17:09,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:09,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-26 19:17:09,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586333729] [2020-10-26 19:17:09,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-26 19:17:09,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:09,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-26 19:17:09,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 19:17:09,483 INFO L87 Difference]: Start difference. First operand 107 states and 109 transitions. Second operand 46 states. [2020-10-26 19:17:09,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:09,889 INFO L93 Difference]: Finished difference Result 126 states and 130 transitions. [2020-10-26 19:17:09,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-26 19:17:09,890 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 101 [2020-10-26 19:17:09,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:09,891 INFO L225 Difference]: With dead ends: 126 [2020-10-26 19:17:09,891 INFO L226 Difference]: Without dead ends: 110 [2020-10-26 19:17:09,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 19:17:09,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-26 19:17:09,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-10-26 19:17:09,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-26 19:17:09,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2020-10-26 19:17:09,897 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 101 [2020-10-26 19:17:09,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:09,897 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2020-10-26 19:17:09,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-26 19:17:09,897 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2020-10-26 19:17:09,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-26 19:17:09,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:09,898 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:09,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-26 19:17:09,899 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:09,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:09,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1257155316, now seen corresponding path program 43 times [2020-10-26 19:17:09,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:09,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495188310] [2020-10-26 19:17:09,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:09,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:09,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:09,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:15,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:15,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-26 19:17:15,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:17:15,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5120 [2020-10-26 19:17:15,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:15,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-26 19:17:15,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:15,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-26 19:17:15,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:16,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:16,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:16,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:16,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:16,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:16,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:16,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:17:16,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:16,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:16,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:16,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:16,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:16,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:16,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495188310] [2020-10-26 19:17:16,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:16,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-26 19:17:16,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096052245] [2020-10-26 19:17:16,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-26 19:17:16,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:16,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-26 19:17:16,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:17:16,524 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand 47 states. [2020-10-26 19:17:17,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:17,023 INFO L93 Difference]: Finished difference Result 128 states and 132 transitions. [2020-10-26 19:17:17,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-26 19:17:17,023 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 103 [2020-10-26 19:17:17,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:17,025 INFO L225 Difference]: With dead ends: 128 [2020-10-26 19:17:17,025 INFO L226 Difference]: Without dead ends: 112 [2020-10-26 19:17:17,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:17:17,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-26 19:17:17,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-26 19:17:17,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-26 19:17:17,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2020-10-26 19:17:17,030 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 103 [2020-10-26 19:17:17,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:17,030 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2020-10-26 19:17:17,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-26 19:17:17,030 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2020-10-26 19:17:17,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-26 19:17:17,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:17,031 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:17,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-26 19:17:17,031 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:17,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:17,032 INFO L82 PathProgramCache]: Analyzing trace with hash -688882966, now seen corresponding path program 44 times [2020-10-26 19:17:17,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:17,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929472025] [2020-10-26 19:17:17,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:17,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:17,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:17,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:22,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:22,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-26 19:17:22,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:17:22,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5105 [2020-10-26 19:17:22,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:22,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-26 19:17:22,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:22,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 19:17:22,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:23,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:23,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:23,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:23,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:23,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:23,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:23,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:17:23,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:23,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:23,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:23,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:23,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:23,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:23,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929472025] [2020-10-26 19:17:23,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:23,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-26 19:17:23,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700131803] [2020-10-26 19:17:23,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-26 19:17:23,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:23,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-26 19:17:23,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-26 19:17:23,705 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand 48 states. [2020-10-26 19:17:23,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:23,962 INFO L93 Difference]: Finished difference Result 130 states and 134 transitions. [2020-10-26 19:17:23,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-26 19:17:23,963 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 105 [2020-10-26 19:17:23,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:23,964 INFO L225 Difference]: With dead ends: 130 [2020-10-26 19:17:23,965 INFO L226 Difference]: Without dead ends: 114 [2020-10-26 19:17:23,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-26 19:17:23,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-26 19:17:23,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-10-26 19:17:23,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-26 19:17:23,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2020-10-26 19:17:23,970 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 105 [2020-10-26 19:17:23,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:23,971 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2020-10-26 19:17:23,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-26 19:17:23,971 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2020-10-26 19:17:23,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-26 19:17:23,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:23,972 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:23,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-26 19:17:23,972 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:23,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:23,973 INFO L82 PathProgramCache]: Analyzing trace with hash -40001208, now seen corresponding path program 45 times [2020-10-26 19:17:23,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:23,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046732098] [2020-10-26 19:17:23,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:23,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:24,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:24,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:29,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:29,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 19:17:29,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:17:29,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5105 [2020-10-26 19:17:29,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:29,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-26 19:17:29,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:29,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-26 19:17:29,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:30,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:30,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:30,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:30,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:30,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:30,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:30,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:17:30,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:30,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:30,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:30,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:30,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:30,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:30,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046732098] [2020-10-26 19:17:30,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:30,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-26 19:17:30,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018842774] [2020-10-26 19:17:30,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-26 19:17:30,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:30,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-26 19:17:30,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 19:17:30,689 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 49 states. [2020-10-26 19:17:31,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:31,098 INFO L93 Difference]: Finished difference Result 132 states and 136 transitions. [2020-10-26 19:17:31,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-26 19:17:31,098 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 107 [2020-10-26 19:17:31,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:31,100 INFO L225 Difference]: With dead ends: 132 [2020-10-26 19:17:31,100 INFO L226 Difference]: Without dead ends: 116 [2020-10-26 19:17:31,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 19:17:31,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-26 19:17:31,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-10-26 19:17:31,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-26 19:17:31,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2020-10-26 19:17:31,105 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 107 [2020-10-26 19:17:31,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:31,106 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2020-10-26 19:17:31,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-26 19:17:31,106 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2020-10-26 19:17:31,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-26 19:17:31,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:31,107 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:31,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-26 19:17:31,107 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:31,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:31,107 INFO L82 PathProgramCache]: Analyzing trace with hash 765110310, now seen corresponding path program 46 times [2020-10-26 19:17:31,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:31,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388393246] [2020-10-26 19:17:31,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:31,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:31,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:31,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:36,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:36,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-26 19:17:36,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:17:36,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-26 19:17:36,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:36,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-26 19:17:36,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:36,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 19:17:36,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:37,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:37,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:37,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:37,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:37,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:37,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:37,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:17:37,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:37,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:37,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:37,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:37,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:37,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:37,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388393246] [2020-10-26 19:17:37,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:37,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-26 19:17:37,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922480897] [2020-10-26 19:17:37,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-26 19:17:37,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:37,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-26 19:17:37,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-26 19:17:37,862 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 50 states. [2020-10-26 19:17:38,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:38,150 INFO L93 Difference]: Finished difference Result 134 states and 138 transitions. [2020-10-26 19:17:38,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-26 19:17:38,150 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 109 [2020-10-26 19:17:38,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:38,152 INFO L225 Difference]: With dead ends: 134 [2020-10-26 19:17:38,152 INFO L226 Difference]: Without dead ends: 118 [2020-10-26 19:17:38,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-26 19:17:38,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-26 19:17:38,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-10-26 19:17:38,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-26 19:17:38,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2020-10-26 19:17:38,163 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 109 [2020-10-26 19:17:38,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:38,163 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2020-10-26 19:17:38,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-26 19:17:38,163 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2020-10-26 19:17:38,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-26 19:17:38,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:38,164 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:38,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-26 19:17:38,165 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:38,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:38,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1383165828, now seen corresponding path program 47 times [2020-10-26 19:17:38,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:38,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401660987] [2020-10-26 19:17:38,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:38,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:38,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:38,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:43,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:43,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-26 19:17:43,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:17:43,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-26 19:17:43,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:43,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-26 19:17:43,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:43,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-26 19:17:43,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:45,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:45,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:45,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:45,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:45,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:45,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:45,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:17:45,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:45,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:45,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:45,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:45,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:45,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:45,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401660987] [2020-10-26 19:17:45,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:45,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-26 19:17:45,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450553250] [2020-10-26 19:17:45,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-26 19:17:45,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:45,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-26 19:17:45,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:17:45,092 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand 51 states. [2020-10-26 19:17:45,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:45,683 INFO L93 Difference]: Finished difference Result 136 states and 140 transitions. [2020-10-26 19:17:45,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-26 19:17:45,684 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 111 [2020-10-26 19:17:45,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:45,685 INFO L225 Difference]: With dead ends: 136 [2020-10-26 19:17:45,686 INFO L226 Difference]: Without dead ends: 120 [2020-10-26 19:17:45,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:17:45,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-26 19:17:45,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-10-26 19:17:45,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-26 19:17:45,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2020-10-26 19:17:45,693 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 111 [2020-10-26 19:17:45,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:45,693 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2020-10-26 19:17:45,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-26 19:17:45,693 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2020-10-26 19:17:45,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-26 19:17:45,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:45,694 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:45,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-26 19:17:45,694 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:45,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:45,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1665935518, now seen corresponding path program 48 times [2020-10-26 19:17:45,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:45,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330763326] [2020-10-26 19:17:45,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:45,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:45,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:45,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:50,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:50,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 19:17:50,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:17:50,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5071 [2020-10-26 19:17:50,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:50,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-26 19:17:50,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:50,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-26 19:17:50,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:52,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:52,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:52,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:52,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:52,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:52,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:52,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:17:52,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:52,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:52,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:52,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:52,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:52,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:52,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330763326] [2020-10-26 19:17:52,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:52,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-26 19:17:52,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783927504] [2020-10-26 19:17:52,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-26 19:17:52,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:52,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-26 19:17:52,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-26 19:17:52,715 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 52 states. [2020-10-26 19:17:53,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:53,193 INFO L93 Difference]: Finished difference Result 138 states and 142 transitions. [2020-10-26 19:17:53,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-26 19:17:53,194 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 113 [2020-10-26 19:17:53,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:53,195 INFO L225 Difference]: With dead ends: 138 [2020-10-26 19:17:53,195 INFO L226 Difference]: Without dead ends: 122 [2020-10-26 19:17:53,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-26 19:17:53,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-26 19:17:53,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-10-26 19:17:53,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-26 19:17:53,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2020-10-26 19:17:53,202 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 113 [2020-10-26 19:17:53,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:53,203 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2020-10-26 19:17:53,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-26 19:17:53,203 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2020-10-26 19:17:53,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-26 19:17:53,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:53,204 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:53,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-26 19:17:53,204 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:53,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:53,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1610334144, now seen corresponding path program 49 times [2020-10-26 19:17:53,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:53,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939337727] [2020-10-26 19:17:53,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:53,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:53,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:53,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:58,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:58,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-26 19:17:58,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:17:58,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-26 19:17:58,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:58,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-26 19:17:58,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:58,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-26 19:17:58,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:00,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:00,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:00,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:00,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:00,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:00,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:00,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:18:00,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:00,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:00,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:00,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:00,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:00,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:00,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939337727] [2020-10-26 19:18:00,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:00,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-26 19:18:00,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709277548] [2020-10-26 19:18:00,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-26 19:18:00,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:00,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-26 19:18:00,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-26 19:18:00,275 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand 53 states. [2020-10-26 19:18:00,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:00,873 INFO L93 Difference]: Finished difference Result 140 states and 144 transitions. [2020-10-26 19:18:00,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-26 19:18:00,873 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 115 [2020-10-26 19:18:00,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:00,875 INFO L225 Difference]: With dead ends: 140 [2020-10-26 19:18:00,875 INFO L226 Difference]: Without dead ends: 124 [2020-10-26 19:18:00,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-26 19:18:00,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-26 19:18:00,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-10-26 19:18:00,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-26 19:18:00,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2020-10-26 19:18:00,881 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 115 [2020-10-26 19:18:00,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:00,881 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2020-10-26 19:18:00,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-26 19:18:00,881 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2020-10-26 19:18:00,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-26 19:18:00,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:00,882 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:00,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-26 19:18:00,883 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:00,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:00,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1894451358, now seen corresponding path program 50 times [2020-10-26 19:18:00,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:00,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608957742] [2020-10-26 19:18:00,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:00,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:00,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:00,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:05,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:05,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 19:18:05,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:18:05,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-26 19:18:05,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:05,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-26 19:18:05,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:05,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-26 19:18:05,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0