/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=DEEPEST --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/loops-crafted-1/mono-crafted_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:27:43,816 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:27:43,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:27:43,878 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:27:43,878 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:27:43,885 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:27:43,887 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:27:43,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:27:43,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:27:43,901 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:27:43,902 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:27:43,904 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:27:43,904 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:27:43,907 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:27:43,910 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:27:43,912 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:27:43,913 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:27:43,916 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:27:43,923 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:27:43,931 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:27:43,933 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:27:43,934 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:27:43,936 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:27:43,939 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:27:43,947 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:27:43,948 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:27:43,948 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:27:43,951 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:27:43,951 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:27:43,953 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:27:43,953 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:27:43,954 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:27:43,956 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:27:43,957 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:27:43,958 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:27:43,959 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:27:43,960 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:27:43,960 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:27:43,960 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:27:43,961 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:27:43,974 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:27:43,977 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 20:27:44,002 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:27:44,003 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:27:44,004 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:27:44,005 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:27:44,005 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:27:44,005 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:27:44,006 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:27:44,006 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:27:44,006 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:27:44,006 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:27:44,007 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:27:44,007 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:27:44,007 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:27:44,007 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:27:44,008 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:27:44,008 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:27:44,008 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:27:44,008 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:27:44,009 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:27:44,009 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:27:44,009 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:27:44,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:27:44,010 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:27:44,010 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:27:44,010 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:27:44,011 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:27:44,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:27:44,011 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:27:44,011 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:27:44,012 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:27:44,371 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:27:44,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:27:44,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:27:44,402 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:27:44,403 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:27:44,404 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_1.c [2020-10-27 20:27:44,489 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2ca3e5e5c/72d0260c9a5143ed9a989dbef5fa42e1/FLAG5f8e832ee [2020-10-27 20:27:45,056 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:27:45,057 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/mono-crafted_1.c [2020-10-27 20:27:45,063 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2ca3e5e5c/72d0260c9a5143ed9a989dbef5fa42e1/FLAG5f8e832ee [2020-10-27 20:27:45,431 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2ca3e5e5c/72d0260c9a5143ed9a989dbef5fa42e1 [2020-10-27 20:27:45,437 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:27:45,445 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:27:45,449 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:27:45,449 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:27:45,453 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:27:45,454 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:27:45" (1/1) ... [2020-10-27 20:27:45,458 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7eb7201e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:27:45, skipping insertion in model container [2020-10-27 20:27:45,459 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:27:45" (1/1) ... [2020-10-27 20:27:45,468 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:27:45,482 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:27:45,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:27:45,668 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:27:45,685 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:27:45,699 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:27:45,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:27:45 WrapperNode [2020-10-27 20:27:45,700 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:27:45,701 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:27:45,701 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:27:45,701 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:27:45,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:27:45" (1/1) ... [2020-10-27 20:27:45,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:27:45" (1/1) ... [2020-10-27 20:27:45,721 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:27:45" (1/1) ... [2020-10-27 20:27:45,721 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:27:45" (1/1) ... [2020-10-27 20:27:45,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:27:45" (1/1) ... [2020-10-27 20:27:45,732 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:27:45" (1/1) ... [2020-10-27 20:27:45,733 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:27:45" (1/1) ... [2020-10-27 20:27:45,735 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:27:45,736 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:27:45,736 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:27:45,736 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:27:45,737 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:27:45" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:27:45,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:27:45,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:27:45,806 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:27:45,806 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:27:45,807 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:27:45,807 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:27:45,807 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:27:45,807 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:27:45,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:27:45,807 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:27:45,808 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:27:45,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:27:45,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:27:45,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:27:45,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:27:45,808 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:27:45,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:27:46,080 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:27:46,081 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 20:27:46,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:27:46 BoogieIcfgContainer [2020-10-27 20:27:46,083 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:27:46,084 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:27:46,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:27:46,088 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:27:46,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:27:45" (1/3) ... [2020-10-27 20:27:46,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17931eef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:27:46, skipping insertion in model container [2020-10-27 20:27:46,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:27:45" (2/3) ... [2020-10-27 20:27:46,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17931eef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:27:46, skipping insertion in model container [2020-10-27 20:27:46,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:27:46" (3/3) ... [2020-10-27 20:27:46,092 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_1.c [2020-10-27 20:27:46,105 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:27:46,110 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:27:46,124 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:27:46,179 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:27:46,182 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:27:46,182 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:27:46,183 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:27:46,183 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:27:46,183 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:27:46,183 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:27:46,183 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:27:46,224 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-27 20:27:46,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 20:27:46,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:46,235 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:46,236 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:46,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:46,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1007641703, now seen corresponding path program 1 times [2020-10-27 20:27:46,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:46,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588919472] [2020-10-27 20:27:46,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:46,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:46,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:46,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:46,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:46,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:46,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:27:46,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:46,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 471 [2020-10-27 20:27:46,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:46,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:46,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:27:46,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:46,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:27:46,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:47,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:47,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:47,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:47,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:47,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:47,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 20:27:47,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:47,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:47,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:47,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:47,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:47,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:47,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588919472] [2020-10-27 20:27:47,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:27:47,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 20:27:47,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423476888] [2020-10-27 20:27:47,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 20:27:47,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:47,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 20:27:47,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:27:47,061 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-10-27 20:27:47,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:47,120 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2020-10-27 20:27:47,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 20:27:47,123 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-27 20:27:47,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:47,131 INFO L225 Difference]: With dead ends: 39 [2020-10-27 20:27:47,131 INFO L226 Difference]: Without dead ends: 15 [2020-10-27 20:27:47,135 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 [2020-10-27 20:27:47,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-27 20:27:47,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-27 20:27:47,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-27 20:27:47,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-10-27 20:27:47,178 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 13 [2020-10-27 20:27:47,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:47,178 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-10-27 20:27:47,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 20:27:47,179 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-10-27 20:27:47,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 20:27:47,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:47,179 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:47,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:27:47,180 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:47,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:47,181 INFO L82 PathProgramCache]: Analyzing trace with hash 722539485, now seen corresponding path program 1 times [2020-10-27 20:27:47,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:47,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976772727] [2020-10-27 20:27:47,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:47,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:47,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:47,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:47,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:47,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:47,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:27:47,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:47,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 282 [2020-10-27 20:27:47,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:47,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:27:47,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:27:47,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 20:27:47,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:47,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:47,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:47,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:47,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:47,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:47,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:47,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 20:27:47,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:47,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:47,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:47,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:47,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:47,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:47,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976772727] [2020-10-27 20:27:47,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:27:47,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:27:47,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051480842] [2020-10-27 20:27:47,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:27:47,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:47,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:27:47,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:27:47,553 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 4 states. [2020-10-27 20:27:47,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:47,641 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2020-10-27 20:27:47,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:27:47,642 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-27 20:27:47,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:47,643 INFO L225 Difference]: With dead ends: 26 [2020-10-27 20:27:47,643 INFO L226 Difference]: Without dead ends: 17 [2020-10-27 20:27:47,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:27:47,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-27 20:27:47,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-27 20:27:47,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 20:27:47,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-27 20:27:47,656 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2020-10-27 20:27:47,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:47,656 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-27 20:27:47,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:27:47,656 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-27 20:27:47,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 20:27:47,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:47,657 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:47,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:27:47,658 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:47,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:47,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1836926234, now seen corresponding path program 1 times [2020-10-27 20:27:47,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:47,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479082856] [2020-10-27 20:27:47,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:47,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:47,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:47,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:47,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:47,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 20:27:47,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:27:47,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-27 20:27:47,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:47,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:27:47,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:47,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 20:27:47,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:47,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:47,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:47,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:47,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:47,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:47,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:47,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:27:47,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:47,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:47,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:47,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:47,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:47,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:47,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479082856] [2020-10-27 20:27:47,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:27:47,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:27:47,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080837577] [2020-10-27 20:27:47,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:27:47,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:47,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:27:47,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:27:47,840 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 4 states. [2020-10-27 20:27:47,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:47,924 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2020-10-27 20:27:47,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:27:47,925 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-27 20:27:47,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:47,927 INFO L225 Difference]: With dead ends: 26 [2020-10-27 20:27:47,927 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 20:27:47,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:27:47,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 20:27:47,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-10-27 20:27:47,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-27 20:27:47,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-10-27 20:27:47,947 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2020-10-27 20:27:47,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:47,947 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-10-27 20:27:47,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:27:47,948 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-10-27 20:27:47,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 20:27:47,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:47,949 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:47,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:27:47,950 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:47,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:47,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1788578603, now seen corresponding path program 1 times [2020-10-27 20:27:47,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:47,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810129727] [2020-10-27 20:27:47,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:47,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:47,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:48,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:48,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:48,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:48,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 20:27:48,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:48,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-27 20:27:48,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:48,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:27:48,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:48,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 20:27:48,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:48,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:48,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:48,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:48,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:48,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:48,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:48,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:27:48,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:48,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:48,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:48,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:48,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:48,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:48,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810129727] [2020-10-27 20:27:48,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:48,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 20:27:48,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057116862] [2020-10-27 20:27:48,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:27:48,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:48,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:27:48,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:27:48,205 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 5 states. [2020-10-27 20:27:48,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:48,321 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-10-27 20:27:48,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:27:48,321 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-27 20:27:48,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:48,324 INFO L225 Difference]: With dead ends: 28 [2020-10-27 20:27:48,324 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 20:27:48,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:27:48,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 20:27:48,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-10-27 20:27:48,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 20:27:48,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-10-27 20:27:48,332 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 17 [2020-10-27 20:27:48,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:48,333 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-10-27 20:27:48,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:27:48,333 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-10-27 20:27:48,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 20:27:48,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:48,334 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:48,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:27:48,334 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:48,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:48,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1614717392, now seen corresponding path program 2 times [2020-10-27 20:27:48,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:48,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381965974] [2020-10-27 20:27:48,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:48,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:48,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:48,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:48,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:48,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:48,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 20:27:48,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:48,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-27 20:27:48,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:48,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:27:48,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:48,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:27:48,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:48,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:48,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:48,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:48,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:48,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:48,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:48,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 20:27:48,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:48,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:48,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:48,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:48,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:48,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:48,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381965974] [2020-10-27 20:27:48,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:48,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:27:48,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285682254] [2020-10-27 20:27:48,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:27:48,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:48,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:27:48,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:27:48,610 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 6 states. [2020-10-27 20:27:48,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:48,786 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-10-27 20:27:48,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:27:48,787 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-27 20:27:48,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:48,788 INFO L225 Difference]: With dead ends: 30 [2020-10-27 20:27:48,788 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 20:27:48,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:27:48,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 20:27:48,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-27 20:27:48,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 20:27:48,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-10-27 20:27:48,794 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 19 [2020-10-27 20:27:48,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:48,795 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-10-27 20:27:48,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:27:48,795 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-10-27 20:27:48,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 20:27:48,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:48,796 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:48,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:27:48,797 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:48,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:48,797 INFO L82 PathProgramCache]: Analyzing trace with hash -582910965, now seen corresponding path program 3 times [2020-10-27 20:27:48,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:48,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884082929] [2020-10-27 20:27:48,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:48,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:48,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:48,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:48,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:48,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:48,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 20:27:48,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:48,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-27 20:27:48,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:48,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:27:48,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:48,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:27:48,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:49,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:49,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:49,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:49,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:49,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:49,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:49,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 20:27:49,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:49,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:49,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:49,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:49,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:49,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:49,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884082929] [2020-10-27 20:27:49,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:49,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:27:49,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741063341] [2020-10-27 20:27:49,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:27:49,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:49,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:27:49,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:27:49,077 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 7 states. [2020-10-27 20:27:49,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:49,296 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2020-10-27 20:27:49,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:27:49,297 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-27 20:27:49,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:49,298 INFO L225 Difference]: With dead ends: 32 [2020-10-27 20:27:49,298 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 20:27:49,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:27:49,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 20:27:49,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-27 20:27:49,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 20:27:49,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-10-27 20:27:49,305 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 21 [2020-10-27 20:27:49,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:49,305 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-10-27 20:27:49,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:27:49,305 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-10-27 20:27:49,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 20:27:49,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:49,306 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:49,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:27:49,307 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:49,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:49,307 INFO L82 PathProgramCache]: Analyzing trace with hash 620147590, now seen corresponding path program 4 times [2020-10-27 20:27:49,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:49,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170701226] [2020-10-27 20:27:49,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:49,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:49,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:49,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:49,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:49,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:49,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 20:27:49,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:49,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 203 [2020-10-27 20:27:49,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:49,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:27:49,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:49,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:27:49,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:49,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:49,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:49,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:49,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:49,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:49,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:49,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:27:49,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:49,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:49,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:49,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:49,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:49,592 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:49,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170701226] [2020-10-27 20:27:49,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:49,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:27:49,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027807949] [2020-10-27 20:27:49,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:27:49,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:49,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:27:49,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:27:49,595 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 8 states. [2020-10-27 20:27:49,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:49,800 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2020-10-27 20:27:49,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:27:49,800 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-27 20:27:49,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:49,801 INFO L225 Difference]: With dead ends: 34 [2020-10-27 20:27:49,802 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 20:27:49,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:27:49,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 20:27:49,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-27 20:27:49,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 20:27:49,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-10-27 20:27:49,809 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 23 [2020-10-27 20:27:49,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:49,809 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-10-27 20:27:49,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:27:49,809 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-10-27 20:27:49,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 20:27:49,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:49,810 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:49,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:27:49,811 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:49,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:49,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1413216321, now seen corresponding path program 5 times [2020-10-27 20:27:49,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:49,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884692020] [2020-10-27 20:27:49,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:49,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:49,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:49,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:49,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:50,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:50,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 20:27:50,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:50,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 232 [2020-10-27 20:27:50,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:50,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:27:50,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:50,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:27:50,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:50,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:50,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:50,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:50,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:50,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:50,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:50,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:27:50,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:50,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:50,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:50,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:50,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:50,142 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:50,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884692020] [2020-10-27 20:27:50,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:50,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:27:50,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297973025] [2020-10-27 20:27:50,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:27:50,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:50,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:27:50,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:27:50,145 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 9 states. [2020-10-27 20:27:50,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:50,515 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2020-10-27 20:27:50,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:27:50,516 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-27 20:27:50,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:50,518 INFO L225 Difference]: With dead ends: 36 [2020-10-27 20:27:50,518 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 20:27:50,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:27:50,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 20:27:50,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-27 20:27:50,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 20:27:50,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-10-27 20:27:50,532 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 25 [2020-10-27 20:27:50,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:50,533 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-10-27 20:27:50,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:27:50,533 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-10-27 20:27:50,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 20:27:50,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:50,534 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:50,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:27:50,534 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:50,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:50,535 INFO L82 PathProgramCache]: Analyzing trace with hash -951911876, now seen corresponding path program 6 times [2020-10-27 20:27:50,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:50,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202207989] [2020-10-27 20:27:50,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:50,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:50,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:50,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:50,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:50,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:50,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 20:27:50,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:50,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 275 [2020-10-27 20:27:50,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:50,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:27:50,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:50,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:27:50,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:50,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:50,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:50,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:50,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:50,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:50,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:27:50,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:50,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:50,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:50,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:50,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:50,924 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:50,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202207989] [2020-10-27 20:27:50,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:50,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:27:50,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916025026] [2020-10-27 20:27:50,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:27:50,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:50,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:27:50,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:27:50,926 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 10 states. [2020-10-27 20:27:51,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:51,306 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2020-10-27 20:27:51,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:27:51,307 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-27 20:27:51,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:51,308 INFO L225 Difference]: With dead ends: 38 [2020-10-27 20:27:51,308 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 20:27:51,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:27:51,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 20:27:51,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-27 20:27:51,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 20:27:51,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2020-10-27 20:27:51,317 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 27 [2020-10-27 20:27:51,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:51,317 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2020-10-27 20:27:51,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:27:51,317 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2020-10-27 20:27:51,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 20:27:51,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:51,319 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:51,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:27:51,319 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:51,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:51,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1802409609, now seen corresponding path program 7 times [2020-10-27 20:27:51,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:51,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761957238] [2020-10-27 20:27:51,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:51,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:51,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:51,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:51,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:51,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:51,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 20:27:51,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:51,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 303 [2020-10-27 20:27:51,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:51,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:27:51,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:51,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 20:27:51,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:51,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:51,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:51,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:51,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:51,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:51,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:51,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:27:51,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:51,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:51,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:51,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:51,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:51,757 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 15 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:51,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761957238] [2020-10-27 20:27:51,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:51,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:27:51,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389970076] [2020-10-27 20:27:51,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:27:51,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:51,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:27:51,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:27:51,760 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 11 states. [2020-10-27 20:27:52,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:52,187 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2020-10-27 20:27:52,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:27:52,187 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-27 20:27:52,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:52,189 INFO L225 Difference]: With dead ends: 40 [2020-10-27 20:27:52,189 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 20:27:52,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:27:52,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 20:27:52,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-27 20:27:52,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 20:27:52,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2020-10-27 20:27:52,197 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 29 [2020-10-27 20:27:52,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:52,197 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2020-10-27 20:27:52,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:27:52,198 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2020-10-27 20:27:52,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 20:27:52,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:52,199 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:52,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:27:52,199 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:52,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:52,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1208022514, now seen corresponding path program 8 times [2020-10-27 20:27:52,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:52,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338248094] [2020-10-27 20:27:52,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:52,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:52,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:52,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:52,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:52,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:52,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 20:27:52,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:52,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 427 [2020-10-27 20:27:52,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:52,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:27:52,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:52,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:27:52,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:52,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:52,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:52,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:52,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:52,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:52,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:52,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:27:52,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:52,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:52,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:52,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:52,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:52,762 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 17 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:52,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338248094] [2020-10-27 20:27:52,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:52,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:27:52,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714609694] [2020-10-27 20:27:52,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:27:52,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:52,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:27:52,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:27:52,764 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand 12 states. [2020-10-27 20:27:53,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:53,165 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2020-10-27 20:27:53,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:27:53,167 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-10-27 20:27:53,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:53,167 INFO L225 Difference]: With dead ends: 42 [2020-10-27 20:27:53,168 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 20:27:53,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:27:53,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 20:27:53,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-27 20:27:53,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 20:27:53,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2020-10-27 20:27:53,178 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 31 [2020-10-27 20:27:53,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:53,179 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2020-10-27 20:27:53,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:27:53,179 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2020-10-27 20:27:53,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 20:27:53,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:53,181 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:53,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:27:53,183 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:53,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:53,184 INFO L82 PathProgramCache]: Analyzing trace with hash -574664787, now seen corresponding path program 9 times [2020-10-27 20:27:53,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:53,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822745463] [2020-10-27 20:27:53,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:53,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:53,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:53,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:53,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:53,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:53,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 20:27:53,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:53,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 459 [2020-10-27 20:27:53,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:53,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:27:53,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:53,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 20:27:53,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:53,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:53,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:53,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:53,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:53,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:53,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:53,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:27:53,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:53,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:53,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:53,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:53,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:53,828 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 19 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:53,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822745463] [2020-10-27 20:27:53,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:53,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:27:53,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050385710] [2020-10-27 20:27:53,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:27:53,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:53,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:27:53,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:27:53,831 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand 13 states. [2020-10-27 20:27:54,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:54,327 INFO L93 Difference]: Finished difference Result 44 states and 57 transitions. [2020-10-27 20:27:54,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:27:54,327 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-27 20:27:54,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:54,328 INFO L225 Difference]: With dead ends: 44 [2020-10-27 20:27:54,328 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 20:27:54,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:27:54,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 20:27:54,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-27 20:27:54,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 20:27:54,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2020-10-27 20:27:54,340 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 33 [2020-10-27 20:27:54,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:54,342 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2020-10-27 20:27:54,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:27:54,342 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2020-10-27 20:27:54,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 20:27:54,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:54,345 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:54,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:27:54,345 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:54,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:54,346 INFO L82 PathProgramCache]: Analyzing trace with hash -45209944, now seen corresponding path program 10 times [2020-10-27 20:27:54,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:54,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598074020] [2020-10-27 20:27:54,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:54,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:54,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:54,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:54,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:54,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:54,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 20:27:54,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:54,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 541 [2020-10-27 20:27:54,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:54,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:27:54,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:54,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 20:27:54,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:55,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:55,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:55,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:55,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:55,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:55,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:55,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:27:55,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:55,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:55,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:55,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:55,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:55,065 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 21 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:55,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598074020] [2020-10-27 20:27:55,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:55,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 20:27:55,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687474975] [2020-10-27 20:27:55,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 20:27:55,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:55,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 20:27:55,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:27:55,068 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand 14 states. [2020-10-27 20:27:55,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:55,646 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2020-10-27 20:27:55,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 20:27:55,646 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-27 20:27:55,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:55,647 INFO L225 Difference]: With dead ends: 46 [2020-10-27 20:27:55,647 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 20:27:55,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:27:55,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 20:27:55,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-27 20:27:55,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 20:27:55,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 50 transitions. [2020-10-27 20:27:55,664 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 50 transitions. Word has length 35 [2020-10-27 20:27:55,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:55,664 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 50 transitions. [2020-10-27 20:27:55,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 20:27:55,664 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 50 transitions. [2020-10-27 20:27:55,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 20:27:55,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:55,667 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:55,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:27:55,667 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:55,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:55,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1954753251, now seen corresponding path program 11 times [2020-10-27 20:27:55,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:55,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083370735] [2020-10-27 20:27:55,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:55,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:55,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:55,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:56,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:56,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 20:27:56,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:56,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 547 [2020-10-27 20:27:56,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:56,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:27:56,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:56,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 20:27:56,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:56,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:56,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:56,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:56,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:56,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:56,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:56,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:27:56,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:56,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:56,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:56,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:56,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:56,435 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 23 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:56,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083370735] [2020-10-27 20:27:56,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:56,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 20:27:56,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293679396] [2020-10-27 20:27:56,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 20:27:56,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:56,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 20:27:56,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:27:56,439 INFO L87 Difference]: Start difference. First operand 38 states and 50 transitions. Second operand 15 states. [2020-10-27 20:27:57,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:57,032 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2020-10-27 20:27:57,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 20:27:57,033 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-10-27 20:27:57,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:57,036 INFO L225 Difference]: With dead ends: 48 [2020-10-27 20:27:57,036 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 20:27:57,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:27:57,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 20:27:57,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-27 20:27:57,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 20:27:57,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 53 transitions. [2020-10-27 20:27:57,053 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 53 transitions. Word has length 37 [2020-10-27 20:27:57,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:57,053 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 53 transitions. [2020-10-27 20:27:57,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 20:27:57,053 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 53 transitions. [2020-10-27 20:27:57,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 20:27:57,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:57,058 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:57,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:27:57,058 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:57,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:57,058 INFO L82 PathProgramCache]: Analyzing trace with hash -225964962, now seen corresponding path program 12 times [2020-10-27 20:27:57,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:57,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688406249] [2020-10-27 20:27:57,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:57,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:57,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:57,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:57,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:57,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:57,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 20:27:57,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:57,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 643 [2020-10-27 20:27:57,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:57,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:27:57,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:57,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 20:27:57,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:57,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:57,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:57,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:57,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:57,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:57,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:57,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:27:57,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:57,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:57,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:57,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:57,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:57,923 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 25 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:57,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688406249] [2020-10-27 20:27:57,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:57,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 20:27:57,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682791378] [2020-10-27 20:27:57,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 20:27:57,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:57,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 20:27:57,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:27:57,925 INFO L87 Difference]: Start difference. First operand 40 states and 53 transitions. Second operand 16 states. [2020-10-27 20:27:58,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:58,610 INFO L93 Difference]: Finished difference Result 50 states and 66 transitions. [2020-10-27 20:27:58,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 20:27:58,611 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-27 20:27:58,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:58,612 INFO L225 Difference]: With dead ends: 50 [2020-10-27 20:27:58,612 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 20:27:58,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:27:58,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 20:27:58,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-27 20:27:58,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 20:27:58,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 56 transitions. [2020-10-27 20:27:58,631 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 56 transitions. Word has length 39 [2020-10-27 20:27:58,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:58,631 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 56 transitions. [2020-10-27 20:27:58,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 20:27:58,632 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 56 transitions. [2020-10-27 20:27:58,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 20:27:58,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:58,635 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:58,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 20:27:58,636 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:58,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:58,636 INFO L82 PathProgramCache]: Analyzing trace with hash 47872793, now seen corresponding path program 13 times [2020-10-27 20:27:58,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:58,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927207287] [2020-10-27 20:27:58,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:58,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:58,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:58,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:58,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:59,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:59,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 20:27:59,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:59,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 580 [2020-10-27 20:27:59,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:59,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:27:59,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:59,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 20:27:59,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:59,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:59,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:59,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:59,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:59,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:59,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:59,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:27:59,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:59,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:59,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:59,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:59,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:59,457 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 27 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:59,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927207287] [2020-10-27 20:27:59,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:59,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 20:27:59,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860205610] [2020-10-27 20:27:59,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 20:27:59,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:59,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 20:27:59,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:27:59,465 INFO L87 Difference]: Start difference. First operand 42 states and 56 transitions. Second operand 17 states. [2020-10-27 20:28:00,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:00,198 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-10-27 20:28:00,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 20:28:00,200 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-10-27 20:28:00,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:00,201 INFO L225 Difference]: With dead ends: 52 [2020-10-27 20:28:00,201 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 20:28:00,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:28:00,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 20:28:00,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-27 20:28:00,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 20:28:00,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 59 transitions. [2020-10-27 20:28:00,216 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 59 transitions. Word has length 41 [2020-10-27 20:28:00,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:00,217 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 59 transitions. [2020-10-27 20:28:00,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 20:28:00,218 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 59 transitions. [2020-10-27 20:28:00,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 20:28:00,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:00,220 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:00,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 20:28:00,220 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:00,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:00,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1212950292, now seen corresponding path program 14 times [2020-10-27 20:28:00,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:00,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [468302087] [2020-10-27 20:28:00,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:00,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:00,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:00,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:00,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:00,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:00,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 20:28:00,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:00,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 599 [2020-10-27 20:28:00,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:00,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:28:00,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:00,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 20:28:00,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:01,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:01,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:01,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:01,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:01,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:01,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:01,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:28:01,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:01,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:01,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:01,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:01,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:01,148 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 29 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:01,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [468302087] [2020-10-27 20:28:01,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:01,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 20:28:01,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139546057] [2020-10-27 20:28:01,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 20:28:01,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:01,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 20:28:01,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 20:28:01,155 INFO L87 Difference]: Start difference. First operand 44 states and 59 transitions. Second operand 18 states. [2020-10-27 20:28:01,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:01,937 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2020-10-27 20:28:01,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 20:28:01,938 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 43 [2020-10-27 20:28:01,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:01,940 INFO L225 Difference]: With dead ends: 54 [2020-10-27 20:28:01,940 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 20:28:01,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 20:28:01,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 20:28:01,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-27 20:28:01,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 20:28:01,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2020-10-27 20:28:01,948 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 43 [2020-10-27 20:28:01,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:01,949 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2020-10-27 20:28:01,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 20:28:01,949 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2020-10-27 20:28:01,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 20:28:01,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:01,950 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:01,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 20:28:01,950 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:01,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:01,950 INFO L82 PathProgramCache]: Analyzing trace with hash -134037425, now seen corresponding path program 15 times [2020-10-27 20:28:01,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:01,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558804480] [2020-10-27 20:28:01,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:01,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:01,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:01,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:02,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:02,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:02,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 20:28:02,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:02,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 596 [2020-10-27 20:28:02,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:02,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:28:02,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:02,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 20:28:02,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:02,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:02,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:02,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:02,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:02,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:02,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:02,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:28:02,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:02,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:02,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:02,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:02,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:02,861 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 31 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:02,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558804480] [2020-10-27 20:28:02,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:02,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 20:28:02,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612464151] [2020-10-27 20:28:02,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 20:28:02,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:02,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 20:28:02,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:28:02,863 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand 19 states. [2020-10-27 20:28:03,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:03,714 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2020-10-27 20:28:03,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 20:28:03,714 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2020-10-27 20:28:03,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:03,716 INFO L225 Difference]: With dead ends: 56 [2020-10-27 20:28:03,716 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 20:28:03,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:28:03,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 20:28:03,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-27 20:28:03,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 20:28:03,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-10-27 20:28:03,725 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 45 [2020-10-27 20:28:03,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:03,725 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-10-27 20:28:03,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 20:28:03,726 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-10-27 20:28:03,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 20:28:03,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:03,726 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:03,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 20:28:03,727 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:03,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:03,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1804077366, now seen corresponding path program 16 times [2020-10-27 20:28:03,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:03,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975913557] [2020-10-27 20:28:03,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:03,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:03,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:03,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:03,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:04,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:04,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 20:28:04,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:04,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 735 [2020-10-27 20:28:04,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:04,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 20:28:04,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:04,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 20:28:04,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:04,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:04,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:04,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:04,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:04,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:04,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:04,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:28:04,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:04,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:04,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:04,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:04,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:04,745 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 33 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:04,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975913557] [2020-10-27 20:28:04,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:04,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 20:28:04,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5615383] [2020-10-27 20:28:04,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 20:28:04,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:04,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 20:28:04,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 20:28:04,747 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 20 states. [2020-10-27 20:28:05,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:05,656 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-10-27 20:28:05,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 20:28:05,657 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2020-10-27 20:28:05,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:05,658 INFO L225 Difference]: With dead ends: 58 [2020-10-27 20:28:05,658 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 20:28:05,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 20:28:05,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 20:28:05,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-27 20:28:05,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 20:28:05,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 68 transitions. [2020-10-27 20:28:05,667 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 68 transitions. Word has length 47 [2020-10-27 20:28:05,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:05,667 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 68 transitions. [2020-10-27 20:28:05,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 20:28:05,668 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 68 transitions. [2020-10-27 20:28:05,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 20:28:05,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:05,668 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:05,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 20:28:05,669 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:05,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:05,669 INFO L82 PathProgramCache]: Analyzing trace with hash -394691963, now seen corresponding path program 17 times [2020-10-27 20:28:05,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:05,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467944800] [2020-10-27 20:28:05,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:05,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:05,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:05,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:05,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:06,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:06,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 20:28:06,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:06,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 746 [2020-10-27 20:28:06,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:06,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 20:28:06,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:06,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 20:28:06,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:06,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:06,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:06,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:06,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:06,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:06,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:06,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:28:06,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:06,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:06,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:06,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:06,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:06,731 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 35 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:06,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467944800] [2020-10-27 20:28:06,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:06,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 20:28:06,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165433788] [2020-10-27 20:28:06,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 20:28:06,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:06,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 20:28:06,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:28:06,734 INFO L87 Difference]: Start difference. First operand 50 states and 68 transitions. Second operand 21 states. [2020-10-27 20:28:07,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:07,755 INFO L93 Difference]: Finished difference Result 60 states and 81 transitions. [2020-10-27 20:28:07,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 20:28:07,756 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 49 [2020-10-27 20:28:07,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:07,757 INFO L225 Difference]: With dead ends: 60 [2020-10-27 20:28:07,757 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 20:28:07,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 20:28:07,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 20:28:07,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-27 20:28:07,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 20:28:07,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2020-10-27 20:28:07,771 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 49 [2020-10-27 20:28:07,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:07,772 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2020-10-27 20:28:07,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 20:28:07,772 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2020-10-27 20:28:07,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 20:28:07,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:07,773 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:07,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 20:28:07,773 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:07,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:07,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1109982080, now seen corresponding path program 18 times [2020-10-27 20:28:07,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:07,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226809052] [2020-10-27 20:28:07,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:07,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:07,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:07,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:07,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:08,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:08,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 20:28:08,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:08,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 704 [2020-10-27 20:28:08,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:08,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 20:28:08,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:08,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 20:28:08,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:08,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:08,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:08,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:08,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:08,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:08,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:08,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:28:08,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:08,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:08,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:08,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:08,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:08,824 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 37 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:08,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226809052] [2020-10-27 20:28:08,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:08,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 20:28:08,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455971853] [2020-10-27 20:28:08,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 20:28:08,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:08,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 20:28:08,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:28:08,826 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand 22 states. [2020-10-27 20:28:09,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:09,870 INFO L93 Difference]: Finished difference Result 62 states and 84 transitions. [2020-10-27 20:28:09,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 20:28:09,871 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 51 [2020-10-27 20:28:09,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:09,872 INFO L225 Difference]: With dead ends: 62 [2020-10-27 20:28:09,872 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 20:28:09,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 20:28:09,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 20:28:09,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-27 20:28:09,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 20:28:09,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2020-10-27 20:28:09,880 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 51 [2020-10-27 20:28:09,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:09,880 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2020-10-27 20:28:09,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 20:28:09,880 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2020-10-27 20:28:09,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 20:28:09,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:09,881 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:09,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 20:28:09,881 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:09,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:09,882 INFO L82 PathProgramCache]: Analyzing trace with hash -302241349, now seen corresponding path program 19 times [2020-10-27 20:28:09,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:09,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278976210] [2020-10-27 20:28:09,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:09,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:09,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:09,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:10,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:10,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:10,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 20:28:10,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:10,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 776 [2020-10-27 20:28:10,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:10,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 20:28:10,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:10,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 20:28:10,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:11,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:11,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:11,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:11,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:11,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:11,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:11,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:28:11,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:11,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:11,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:11,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:11,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:11,050 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 39 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:11,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278976210] [2020-10-27 20:28:11,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:11,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 20:28:11,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552244999] [2020-10-27 20:28:11,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 20:28:11,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:11,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 20:28:11,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:28:11,052 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand 23 states. [2020-10-27 20:28:12,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:12,238 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2020-10-27 20:28:12,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 20:28:12,241 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 53 [2020-10-27 20:28:12,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:12,242 INFO L225 Difference]: With dead ends: 64 [2020-10-27 20:28:12,243 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 20:28:12,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 20:28:12,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 20:28:12,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-27 20:28:12,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 20:28:12,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 77 transitions. [2020-10-27 20:28:12,250 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 77 transitions. Word has length 53 [2020-10-27 20:28:12,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:12,250 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 77 transitions. [2020-10-27 20:28:12,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 20:28:12,251 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 77 transitions. [2020-10-27 20:28:12,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 20:28:12,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:12,251 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:12,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 20:28:12,252 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:12,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:12,252 INFO L82 PathProgramCache]: Analyzing trace with hash -239291082, now seen corresponding path program 20 times [2020-10-27 20:28:12,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:12,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132290597] [2020-10-27 20:28:12,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:12,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:12,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:12,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:12,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:13,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:13,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 20:28:13,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:13,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 783 [2020-10-27 20:28:13,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:13,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 20:28:13,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:13,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 20:28:13,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:13,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:13,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:13,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:13,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:13,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:13,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:13,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:28:13,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:13,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:13,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:13,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:13,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:13,477 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 41 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:13,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132290597] [2020-10-27 20:28:13,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:13,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 20:28:13,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102181525] [2020-10-27 20:28:13,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 20:28:13,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:13,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 20:28:13,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:28:13,480 INFO L87 Difference]: Start difference. First operand 56 states and 77 transitions. Second operand 24 states. [2020-10-27 20:28:14,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:14,682 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2020-10-27 20:28:14,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 20:28:14,683 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 55 [2020-10-27 20:28:14,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:14,684 INFO L225 Difference]: With dead ends: 66 [2020-10-27 20:28:14,684 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 20:28:14,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 20:28:14,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 20:28:14,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-27 20:28:14,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 20:28:14,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 80 transitions. [2020-10-27 20:28:14,692 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 80 transitions. Word has length 55 [2020-10-27 20:28:14,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:14,692 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 80 transitions. [2020-10-27 20:28:14,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 20:28:14,692 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 80 transitions. [2020-10-27 20:28:14,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 20:28:14,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:14,693 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:14,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 20:28:14,693 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:14,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:14,694 INFO L82 PathProgramCache]: Analyzing trace with hash 126373361, now seen corresponding path program 21 times [2020-10-27 20:28:14,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:14,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621283122] [2020-10-27 20:28:14,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:14,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:14,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:14,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:14,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:15,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:15,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 20:28:15,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:15,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 852 [2020-10-27 20:28:15,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:15,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 20:28:15,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:15,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 20:28:15,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:16,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:16,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:16,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:16,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:16,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:16,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:16,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:28:16,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:16,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:16,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:16,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:16,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:16,050 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 43 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:16,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621283122] [2020-10-27 20:28:16,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:16,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 20:28:16,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740882912] [2020-10-27 20:28:16,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 20:28:16,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:16,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 20:28:16,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:28:16,052 INFO L87 Difference]: Start difference. First operand 58 states and 80 transitions. Second operand 25 states. [2020-10-27 20:28:17,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:17,357 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2020-10-27 20:28:17,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 20:28:17,358 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2020-10-27 20:28:17,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:17,359 INFO L225 Difference]: With dead ends: 68 [2020-10-27 20:28:17,359 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 20:28:17,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 20:28:17,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 20:28:17,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-10-27 20:28:17,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 20:28:17,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 83 transitions. [2020-10-27 20:28:17,367 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 83 transitions. Word has length 57 [2020-10-27 20:28:17,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:17,367 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 83 transitions. [2020-10-27 20:28:17,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 20:28:17,367 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 83 transitions. [2020-10-27 20:28:17,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 20:28:17,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:17,368 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:17,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 20:28:17,368 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:17,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:17,369 INFO L82 PathProgramCache]: Analyzing trace with hash -657415188, now seen corresponding path program 22 times [2020-10-27 20:28:17,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:17,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303013444] [2020-10-27 20:28:17,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:17,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:17,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:17,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:17,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:18,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:18,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 20:28:18,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:18,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 700 [2020-10-27 20:28:18,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:18,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 20:28:18,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:18,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 20:28:18,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:18,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:18,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:18,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:18,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:18,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:18,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:18,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:28:18,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:18,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:18,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:18,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:18,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:28:18,656 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 45 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:18,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303013444] [2020-10-27 20:28:18,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:18,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 20:28:18,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888478987] [2020-10-27 20:28:18,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 20:28:18,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:18,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 20:28:18,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 20:28:18,659 INFO L87 Difference]: Start difference. First operand 60 states and 83 transitions. Second operand 26 states. [2020-10-27 20:28:20,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:20,045 INFO L93 Difference]: Finished difference Result 70 states and 96 transitions. [2020-10-27 20:28:20,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 20:28:20,045 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 59 [2020-10-27 20:28:20,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:20,046 INFO L225 Difference]: With dead ends: 70 [2020-10-27 20:28:20,047 INFO L226 Difference]: Without dead ends: 63 [2020-10-27 20:28:20,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 20:28:20,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-27 20:28:20,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-10-27 20:28:20,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 20:28:20,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 86 transitions. [2020-10-27 20:28:20,054 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 86 transitions. Word has length 59 [2020-10-27 20:28:20,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:20,055 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 86 transitions. [2020-10-27 20:28:20,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 20:28:20,055 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 86 transitions. [2020-10-27 20:28:20,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 20:28:20,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:20,056 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:20,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 20:28:20,056 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:20,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:20,056 INFO L82 PathProgramCache]: Analyzing trace with hash 2036033319, now seen corresponding path program 23 times [2020-10-27 20:28:20,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:20,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100975420] [2020-10-27 20:28:20,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:20,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:20,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:20,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:20,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:20,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:20,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 20:28:20,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:20,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 661 [2020-10-27 20:28:20,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:20,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 20:28:20,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:20,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 20:28:20,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:21,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:21,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:21,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:21,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:21,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:21,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:21,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:28:21,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:21,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:21,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:21,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:21,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:21,192 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 47 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:21,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100975420] [2020-10-27 20:28:21,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:21,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 20:28:21,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108104252] [2020-10-27 20:28:21,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 20:28:21,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:21,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 20:28:21,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:28:21,195 INFO L87 Difference]: Start difference. First operand 62 states and 86 transitions. Second operand 27 states. [2020-10-27 20:28:22,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:22,670 INFO L93 Difference]: Finished difference Result 72 states and 99 transitions. [2020-10-27 20:28:22,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 20:28:22,671 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 61 [2020-10-27 20:28:22,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:22,672 INFO L225 Difference]: With dead ends: 72 [2020-10-27 20:28:22,672 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 20:28:22,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 20:28:22,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 20:28:22,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-27 20:28:22,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 20:28:22,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 89 transitions. [2020-10-27 20:28:22,684 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 89 transitions. Word has length 61 [2020-10-27 20:28:22,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:22,684 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 89 transitions. [2020-10-27 20:28:22,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 20:28:22,685 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 89 transitions. [2020-10-27 20:28:22,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 20:28:22,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:22,687 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:22,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 20:28:22,687 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:22,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:22,690 INFO L82 PathProgramCache]: Analyzing trace with hash 574769058, now seen corresponding path program 24 times [2020-10-27 20:28:22,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:22,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190199671] [2020-10-27 20:28:22,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:22,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:22,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:22,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:23,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:23,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:23,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 20:28:23,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:23,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 752 [2020-10-27 20:28:23,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:23,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 20:28:23,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:23,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 20:28:23,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:23,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:23,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:23,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:23,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:23,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:23,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:23,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:28:23,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:23,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:23,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:23,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:23,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:23,981 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 49 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:23,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190199671] [2020-10-27 20:28:23,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:23,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 20:28:23,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073701554] [2020-10-27 20:28:23,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 20:28:23,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:23,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 20:28:23,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 20:28:23,983 INFO L87 Difference]: Start difference. First operand 64 states and 89 transitions. Second operand 28 states. [2020-10-27 20:28:25,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:25,545 INFO L93 Difference]: Finished difference Result 74 states and 102 transitions. [2020-10-27 20:28:25,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 20:28:25,545 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 63 [2020-10-27 20:28:25,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:25,546 INFO L225 Difference]: With dead ends: 74 [2020-10-27 20:28:25,546 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 20:28:25,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 20:28:25,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 20:28:25,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-27 20:28:25,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-27 20:28:25,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 92 transitions. [2020-10-27 20:28:25,554 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 92 transitions. Word has length 63 [2020-10-27 20:28:25,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:25,554 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 92 transitions. [2020-10-27 20:28:25,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 20:28:25,554 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 92 transitions. [2020-10-27 20:28:25,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 20:28:25,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:25,555 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:25,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 20:28:25,555 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:25,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:25,556 INFO L82 PathProgramCache]: Analyzing trace with hash 754120029, now seen corresponding path program 25 times [2020-10-27 20:28:25,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:25,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808077372] [2020-10-27 20:28:25,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:25,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:25,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:25,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:25,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:26,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:26,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 20:28:26,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:26,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 927 [2020-10-27 20:28:26,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:26,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 20:28:26,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:26,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 20:28:26,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:27,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:27,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:27,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:27,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:27,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:27,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:27,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:28:27,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:27,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:27,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:27,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:27,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:27,033 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 51 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:27,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808077372] [2020-10-27 20:28:27,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:27,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 20:28:27,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080243526] [2020-10-27 20:28:27,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 20:28:27,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:27,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 20:28:27,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:28:27,035 INFO L87 Difference]: Start difference. First operand 66 states and 92 transitions. Second operand 29 states. [2020-10-27 20:28:28,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:28,669 INFO L93 Difference]: Finished difference Result 76 states and 105 transitions. [2020-10-27 20:28:28,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 20:28:28,670 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 65 [2020-10-27 20:28:28,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:28,671 INFO L225 Difference]: With dead ends: 76 [2020-10-27 20:28:28,671 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 20:28:28,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 20:28:28,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 20:28:28,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-27 20:28:28,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 20:28:28,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 95 transitions. [2020-10-27 20:28:28,680 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 95 transitions. Word has length 65 [2020-10-27 20:28:28,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:28,680 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 95 transitions. [2020-10-27 20:28:28,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 20:28:28,680 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 95 transitions. [2020-10-27 20:28:28,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 20:28:28,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:28,681 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:28,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 20:28:28,681 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:28,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:28,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1311711320, now seen corresponding path program 26 times [2020-10-27 20:28:28,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:28,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [817669083] [2020-10-27 20:28:28,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:28,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:28,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:28,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:29,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:29,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:29,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 20:28:29,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:29,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 843 [2020-10-27 20:28:29,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:29,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 20:28:29,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:29,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 20:28:29,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:30,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:30,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:30,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:30,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:30,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:30,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:30,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:28:30,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:30,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:30,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:30,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:30,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:30,113 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 53 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:30,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [817669083] [2020-10-27 20:28:30,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:30,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 20:28:30,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675210204] [2020-10-27 20:28:30,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 20:28:30,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:30,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 20:28:30,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 20:28:30,115 INFO L87 Difference]: Start difference. First operand 68 states and 95 transitions. Second operand 30 states. [2020-10-27 20:28:31,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:31,841 INFO L93 Difference]: Finished difference Result 78 states and 108 transitions. [2020-10-27 20:28:31,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 20:28:31,841 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 67 [2020-10-27 20:28:31,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:31,843 INFO L225 Difference]: With dead ends: 78 [2020-10-27 20:28:31,843 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 20:28:31,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 20:28:31,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 20:28:31,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-10-27 20:28:31,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-27 20:28:31,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 98 transitions. [2020-10-27 20:28:31,851 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 98 transitions. Word has length 67 [2020-10-27 20:28:31,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:31,851 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 98 transitions. [2020-10-27 20:28:31,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 20:28:31,851 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 98 transitions. [2020-10-27 20:28:31,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 20:28:31,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:31,852 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:31,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 20:28:31,852 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:31,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:31,853 INFO L82 PathProgramCache]: Analyzing trace with hash 286029971, now seen corresponding path program 27 times [2020-10-27 20:28:31,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:31,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415266681] [2020-10-27 20:28:31,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:31,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:31,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:31,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:32,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:32,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:32,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 20:28:32,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:32,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 868 [2020-10-27 20:28:32,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:32,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 20:28:32,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:32,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 20:28:32,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:33,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:33,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:33,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:33,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:33,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:33,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:33,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 20:28:33,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:33,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:33,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:33,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:33,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:33,361 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 55 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:33,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415266681] [2020-10-27 20:28:33,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:33,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 20:28:33,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933229916] [2020-10-27 20:28:33,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 20:28:33,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:33,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 20:28:33,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:28:33,362 INFO L87 Difference]: Start difference. First operand 70 states and 98 transitions. Second operand 31 states. [2020-10-27 20:28:35,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:35,076 INFO L93 Difference]: Finished difference Result 80 states and 111 transitions. [2020-10-27 20:28:35,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 20:28:35,077 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 69 [2020-10-27 20:28:35,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:35,078 INFO L225 Difference]: With dead ends: 80 [2020-10-27 20:28:35,078 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 20:28:35,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 20:28:35,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 20:28:35,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-10-27 20:28:35,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 20:28:35,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 101 transitions. [2020-10-27 20:28:35,086 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 101 transitions. Word has length 69 [2020-10-27 20:28:35,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:35,087 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 101 transitions. [2020-10-27 20:28:35,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 20:28:35,087 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 101 transitions. [2020-10-27 20:28:35,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 20:28:35,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:35,087 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:35,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 20:28:35,088 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:35,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:35,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1846235634, now seen corresponding path program 28 times [2020-10-27 20:28:35,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:35,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214732039] [2020-10-27 20:28:35,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:35,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:35,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:35,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:35,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:35,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:35,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 20:28:35,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:35,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 874 [2020-10-27 20:28:35,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:35,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 20:28:35,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:35,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 20:28:35,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:36,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:36,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:36,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:36,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:36,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:36,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:36,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:28:36,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:36,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:36,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:36,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:36,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:36,638 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 57 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:36,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214732039] [2020-10-27 20:28:36,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:36,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 20:28:36,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81724154] [2020-10-27 20:28:36,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 20:28:36,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:36,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 20:28:36,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 20:28:36,640 INFO L87 Difference]: Start difference. First operand 72 states and 101 transitions. Second operand 32 states. [2020-10-27 20:28:38,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:38,547 INFO L93 Difference]: Finished difference Result 82 states and 114 transitions. [2020-10-27 20:28:38,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 20:28:38,548 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 71 [2020-10-27 20:28:38,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:38,549 INFO L225 Difference]: With dead ends: 82 [2020-10-27 20:28:38,549 INFO L226 Difference]: Without dead ends: 75 [2020-10-27 20:28:38,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 20:28:38,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-27 20:28:38,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-10-27 20:28:38,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 20:28:38,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 104 transitions. [2020-10-27 20:28:38,556 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 104 transitions. Word has length 71 [2020-10-27 20:28:38,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:38,556 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 104 transitions. [2020-10-27 20:28:38,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 20:28:38,556 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 104 transitions. [2020-10-27 20:28:38,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 20:28:38,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:38,557 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:38,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 20:28:38,557 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:38,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:38,558 INFO L82 PathProgramCache]: Analyzing trace with hash 2040885449, now seen corresponding path program 29 times [2020-10-27 20:28:38,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:38,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915799486] [2020-10-27 20:28:38,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:38,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:38,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:39,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:39,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:39,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 20:28:39,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:39,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1185 [2020-10-27 20:28:39,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:39,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 20:28:39,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:39,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 20:28:39,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:40,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:40,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:40,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:40,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:40,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:40,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:40,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:28:40,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:40,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:40,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:40,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:40,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:40,463 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 59 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:40,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915799486] [2020-10-27 20:28:40,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:40,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 20:28:40,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791862394] [2020-10-27 20:28:40,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 20:28:40,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:40,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 20:28:40,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 20:28:40,465 INFO L87 Difference]: Start difference. First operand 74 states and 104 transitions. Second operand 33 states. [2020-10-27 20:28:42,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:42,494 INFO L93 Difference]: Finished difference Result 84 states and 117 transitions. [2020-10-27 20:28:42,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 20:28:42,494 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 73 [2020-10-27 20:28:42,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:42,496 INFO L225 Difference]: With dead ends: 84 [2020-10-27 20:28:42,496 INFO L226 Difference]: Without dead ends: 77 [2020-10-27 20:28:42,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 20:28:42,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-27 20:28:42,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-27 20:28:42,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 20:28:42,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 107 transitions. [2020-10-27 20:28:42,503 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 107 transitions. Word has length 73 [2020-10-27 20:28:42,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:42,503 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 107 transitions. [2020-10-27 20:28:42,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 20:28:42,503 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 107 transitions. [2020-10-27 20:28:42,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 20:28:42,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:42,504 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:42,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 20:28:42,504 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:42,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:42,504 INFO L82 PathProgramCache]: Analyzing trace with hash 942698692, now seen corresponding path program 30 times [2020-10-27 20:28:42,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:42,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678058446] [2020-10-27 20:28:42,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:42,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:42,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:42,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:42,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:43,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:43,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 20:28:43,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:43,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 975 [2020-10-27 20:28:43,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:43,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 20:28:43,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:43,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 20:28:43,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:44,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:44,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:44,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:44,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:44,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:44,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:44,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:28:44,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:44,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:44,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:44,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:44,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:44,238 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 61 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:44,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678058446] [2020-10-27 20:28:44,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:44,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 20:28:44,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451604649] [2020-10-27 20:28:44,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 20:28:44,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:44,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 20:28:44,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 20:28:44,240 INFO L87 Difference]: Start difference. First operand 76 states and 107 transitions. Second operand 34 states. [2020-10-27 20:28:46,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:46,350 INFO L93 Difference]: Finished difference Result 86 states and 120 transitions. [2020-10-27 20:28:46,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 20:28:46,351 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 75 [2020-10-27 20:28:46,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:46,352 INFO L225 Difference]: With dead ends: 86 [2020-10-27 20:28:46,352 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 20:28:46,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 20:28:46,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 20:28:46,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-27 20:28:46,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 20:28:46,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 110 transitions. [2020-10-27 20:28:46,364 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 110 transitions. Word has length 75 [2020-10-27 20:28:46,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:46,364 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 110 transitions. [2020-10-27 20:28:46,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 20:28:46,365 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 110 transitions. [2020-10-27 20:28:46,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 20:28:46,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:46,366 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:46,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 20:28:46,366 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:46,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:46,366 INFO L82 PathProgramCache]: Analyzing trace with hash 2147180031, now seen corresponding path program 31 times [2020-10-27 20:28:46,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:46,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821604575] [2020-10-27 20:28:46,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:46,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:46,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:46,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:46,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:47,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:47,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 20:28:47,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:47,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1467 [2020-10-27 20:28:47,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:47,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 20:28:47,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:47,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 20:28:47,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:48,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:48,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:48,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:48,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:48,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:48,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:48,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:28:48,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:48,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:48,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:48,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:48,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:48,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 63 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:48,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821604575] [2020-10-27 20:28:48,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:48,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 20:28:48,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94033714] [2020-10-27 20:28:48,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 20:28:48,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:48,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 20:28:48,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:28:48,658 INFO L87 Difference]: Start difference. First operand 78 states and 110 transitions. Second operand 35 states. [2020-10-27 20:28:50,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:50,868 INFO L93 Difference]: Finished difference Result 88 states and 123 transitions. [2020-10-27 20:28:50,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 20:28:50,869 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 77 [2020-10-27 20:28:50,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:50,870 INFO L225 Difference]: With dead ends: 88 [2020-10-27 20:28:50,870 INFO L226 Difference]: Without dead ends: 81 [2020-10-27 20:28:50,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 20:28:50,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-27 20:28:50,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-27 20:28:50,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-27 20:28:50,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 113 transitions. [2020-10-27 20:28:50,878 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 113 transitions. Word has length 77 [2020-10-27 20:28:50,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:50,879 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 113 transitions. [2020-10-27 20:28:50,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 20:28:50,879 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 113 transitions. [2020-10-27 20:28:50,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 20:28:50,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:50,880 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:50,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 20:28:50,880 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:50,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:50,880 INFO L82 PathProgramCache]: Analyzing trace with hash 12576890, now seen corresponding path program 32 times [2020-10-27 20:28:50,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:50,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349077343] [2020-10-27 20:28:50,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:50,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:50,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:50,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:51,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:52,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:52,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 20:28:52,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:52,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1339 [2020-10-27 20:28:52,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:52,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 20:28:52,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:52,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 20:28:52,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:53,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:53,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:53,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:53,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:53,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:53,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:53,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:28:53,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:53,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:53,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:53,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:53,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:53,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 65 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:53,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349077343] [2020-10-27 20:28:53,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:53,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 20:28:53,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559135588] [2020-10-27 20:28:53,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 20:28:53,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:53,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 20:28:53,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 20:28:53,082 INFO L87 Difference]: Start difference. First operand 80 states and 113 transitions. Second operand 36 states. [2020-10-27 20:28:55,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:55,296 INFO L93 Difference]: Finished difference Result 90 states and 126 transitions. [2020-10-27 20:28:55,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 20:28:55,296 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 79 [2020-10-27 20:28:55,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:55,298 INFO L225 Difference]: With dead ends: 90 [2020-10-27 20:28:55,298 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 20:28:55,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 20:28:55,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 20:28:55,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-10-27 20:28:55,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 20:28:55,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 116 transitions. [2020-10-27 20:28:55,304 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 116 transitions. Word has length 79 [2020-10-27 20:28:55,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:55,304 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 116 transitions. [2020-10-27 20:28:55,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 20:28:55,304 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 116 transitions. [2020-10-27 20:28:55,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 20:28:55,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:55,305 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:55,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 20:28:55,305 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:55,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:55,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1653325877, now seen corresponding path program 33 times [2020-10-27 20:28:55,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:55,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548839605] [2020-10-27 20:28:55,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:55,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:55,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:55,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:55,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:56,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:56,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 20:28:56,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:28:56,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1304 [2020-10-27 20:28:56,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:56,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 20:28:56,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:56,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 20:28:56,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:57,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:57,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:57,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:57,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:57,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:57,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:57,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:28:57,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:57,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:57,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:57,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:57,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:57,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 67 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:57,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548839605] [2020-10-27 20:28:57,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:57,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 20:28:57,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914468544] [2020-10-27 20:28:57,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 20:28:57,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:57,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 20:28:57,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 20:28:57,512 INFO L87 Difference]: Start difference. First operand 82 states and 116 transitions. Second operand 37 states. [2020-10-27 20:28:59,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:59,905 INFO L93 Difference]: Finished difference Result 92 states and 129 transitions. [2020-10-27 20:28:59,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 20:28:59,906 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 81 [2020-10-27 20:28:59,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:59,907 INFO L225 Difference]: With dead ends: 92 [2020-10-27 20:28:59,907 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 20:28:59,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2020-10-27 20:28:59,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 20:28:59,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-27 20:28:59,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-27 20:28:59,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 119 transitions. [2020-10-27 20:28:59,913 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 119 transitions. Word has length 81 [2020-10-27 20:28:59,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:59,914 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 119 transitions. [2020-10-27 20:28:59,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 20:28:59,914 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 119 transitions. [2020-10-27 20:28:59,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 20:28:59,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:59,915 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:59,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 20:28:59,915 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:59,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:59,916 INFO L82 PathProgramCache]: Analyzing trace with hash -2134862544, now seen corresponding path program 34 times [2020-10-27 20:28:59,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:59,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682502201] [2020-10-27 20:28:59,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:59,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:59,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:59,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:00,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:01,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:01,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 20:29:01,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:01,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1216 [2020-10-27 20:29:01,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:01,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 20:29:01,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:01,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 20:29:01,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:02,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:02,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:02,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:02,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:02,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:02,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:02,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:29:02,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:02,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:02,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:02,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:02,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:02,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 69 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:02,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682502201] [2020-10-27 20:29:02,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:02,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 20:29:02,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584038846] [2020-10-27 20:29:02,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 20:29:02,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:02,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 20:29:02,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 20:29:02,093 INFO L87 Difference]: Start difference. First operand 84 states and 119 transitions. Second operand 38 states. [2020-10-27 20:29:04,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:04,612 INFO L93 Difference]: Finished difference Result 94 states and 132 transitions. [2020-10-27 20:29:04,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 20:29:04,613 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 83 [2020-10-27 20:29:04,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:04,614 INFO L225 Difference]: With dead ends: 94 [2020-10-27 20:29:04,614 INFO L226 Difference]: Without dead ends: 87 [2020-10-27 20:29:04,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2020-10-27 20:29:04,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-27 20:29:04,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-10-27 20:29:04,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-27 20:29:04,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 122 transitions. [2020-10-27 20:29:04,621 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 122 transitions. Word has length 83 [2020-10-27 20:29:04,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:04,621 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 122 transitions. [2020-10-27 20:29:04,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 20:29:04,622 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 122 transitions. [2020-10-27 20:29:04,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 20:29:04,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:04,622 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:04,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 20:29:04,623 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:04,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:04,623 INFO L82 PathProgramCache]: Analyzing trace with hash -451668117, now seen corresponding path program 35 times [2020-10-27 20:29:04,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:04,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466490635] [2020-10-27 20:29:04,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:04,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:04,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:04,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:04,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:06,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:06,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 20:29:06,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:06,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1629 [2020-10-27 20:29:06,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:06,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 20:29:06,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:06,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 20:29:06,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:07,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:07,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:07,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:07,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:07,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:07,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:07,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:29:07,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:07,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:07,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:07,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:07,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:07,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 71 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:07,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466490635] [2020-10-27 20:29:07,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:07,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 20:29:07,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760025533] [2020-10-27 20:29:07,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 20:29:07,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:07,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 20:29:07,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 20:29:07,258 INFO L87 Difference]: Start difference. First operand 86 states and 122 transitions. Second operand 39 states. [2020-10-27 20:29:09,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:09,849 INFO L93 Difference]: Finished difference Result 96 states and 135 transitions. [2020-10-27 20:29:09,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 20:29:09,849 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 85 [2020-10-27 20:29:09,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:09,851 INFO L225 Difference]: With dead ends: 96 [2020-10-27 20:29:09,851 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 20:29:09,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2020-10-27 20:29:09,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 20:29:09,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-27 20:29:09,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-27 20:29:09,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 125 transitions. [2020-10-27 20:29:09,862 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 125 transitions. Word has length 85 [2020-10-27 20:29:09,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:09,863 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 125 transitions. [2020-10-27 20:29:09,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 20:29:09,863 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 125 transitions. [2020-10-27 20:29:09,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 20:29:09,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:09,864 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:09,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 20:29:09,864 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:09,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:09,865 INFO L82 PathProgramCache]: Analyzing trace with hash -2104494362, now seen corresponding path program 36 times [2020-10-27 20:29:09,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:09,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9102822] [2020-10-27 20:29:09,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:09,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:09,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:09,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:10,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:11,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:11,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 20:29:11,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:11,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1363 [2020-10-27 20:29:11,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:11,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 20:29:11,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:11,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 20:29:11,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:12,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:12,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:12,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:12,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:12,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:12,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:12,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:29:12,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:12,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:12,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:12,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:12,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:12,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 73 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:12,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9102822] [2020-10-27 20:29:12,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:12,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 20:29:12,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272379516] [2020-10-27 20:29:12,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 20:29:12,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:12,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 20:29:12,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 20:29:12,293 INFO L87 Difference]: Start difference. First operand 88 states and 125 transitions. Second operand 40 states. [2020-10-27 20:29:14,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:14,916 INFO L93 Difference]: Finished difference Result 98 states and 138 transitions. [2020-10-27 20:29:14,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 20:29:14,917 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 87 [2020-10-27 20:29:14,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:14,918 INFO L225 Difference]: With dead ends: 98 [2020-10-27 20:29:14,918 INFO L226 Difference]: Without dead ends: 91 [2020-10-27 20:29:14,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2020-10-27 20:29:14,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-27 20:29:14,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-10-27 20:29:14,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-27 20:29:14,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 128 transitions. [2020-10-27 20:29:14,931 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 128 transitions. Word has length 87 [2020-10-27 20:29:14,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:14,931 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 128 transitions. [2020-10-27 20:29:14,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 20:29:14,931 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 128 transitions. [2020-10-27 20:29:14,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-27 20:29:14,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:14,932 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:14,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 20:29:14,933 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:14,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:14,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1332616287, now seen corresponding path program 37 times [2020-10-27 20:29:14,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:14,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773827426] [2020-10-27 20:29:14,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:14,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:14,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:14,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:15,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:16,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:16,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 20:29:16,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:16,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1674 [2020-10-27 20:29:16,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:16,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 20:29:16,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:16,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 20:29:16,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:17,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:17,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:17,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:17,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:17,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:17,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:17,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:29:17,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:17,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:17,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:17,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:17,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:17,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 75 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:17,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773827426] [2020-10-27 20:29:17,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:17,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 20:29:17,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235904983] [2020-10-27 20:29:17,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 20:29:17,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:17,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 20:29:17,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 20:29:17,723 INFO L87 Difference]: Start difference. First operand 90 states and 128 transitions. Second operand 41 states. [2020-10-27 20:29:20,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:20,623 INFO L93 Difference]: Finished difference Result 100 states and 141 transitions. [2020-10-27 20:29:20,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 20:29:20,624 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 89 [2020-10-27 20:29:20,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:20,625 INFO L225 Difference]: With dead ends: 100 [2020-10-27 20:29:20,625 INFO L226 Difference]: Without dead ends: 93 [2020-10-27 20:29:20,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2020-10-27 20:29:20,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-27 20:29:20,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-10-27 20:29:20,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 20:29:20,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 131 transitions. [2020-10-27 20:29:20,634 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 131 transitions. Word has length 89 [2020-10-27 20:29:20,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:20,634 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 131 transitions. [2020-10-27 20:29:20,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 20:29:20,635 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 131 transitions. [2020-10-27 20:29:20,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-27 20:29:20,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:20,635 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:20,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 20:29:20,636 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:20,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:20,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1707838876, now seen corresponding path program 38 times [2020-10-27 20:29:20,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:20,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107692488] [2020-10-27 20:29:20,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:20,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:20,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:20,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:21,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:22,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:22,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 20:29:22,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:22,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1417 [2020-10-27 20:29:22,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:22,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 20:29:22,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:22,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 20:29:22,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:23,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:23,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:23,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:23,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:23,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:23,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:23,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:29:23,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:23,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:23,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:23,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:23,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:23,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 77 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:23,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107692488] [2020-10-27 20:29:23,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:23,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 20:29:23,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786437316] [2020-10-27 20:29:23,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 20:29:23,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:23,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 20:29:23,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 20:29:23,224 INFO L87 Difference]: Start difference. First operand 92 states and 131 transitions. Second operand 42 states. [2020-10-27 20:29:26,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:26,234 INFO L93 Difference]: Finished difference Result 102 states and 144 transitions. [2020-10-27 20:29:26,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 20:29:26,235 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 91 [2020-10-27 20:29:26,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:26,236 INFO L225 Difference]: With dead ends: 102 [2020-10-27 20:29:26,236 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 20:29:26,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2020-10-27 20:29:26,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 20:29:26,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2020-10-27 20:29:26,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 20:29:26,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 134 transitions. [2020-10-27 20:29:26,245 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 134 transitions. Word has length 91 [2020-10-27 20:29:26,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:26,246 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 134 transitions. [2020-10-27 20:29:26,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 20:29:26,246 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 134 transitions. [2020-10-27 20:29:26,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 20:29:26,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:26,247 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:26,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 20:29:26,247 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:26,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:26,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1287478057, now seen corresponding path program 39 times [2020-10-27 20:29:26,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:26,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281402426] [2020-10-27 20:29:26,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:26,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:26,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:26,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:27,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:27,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:27,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 20:29:27,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:27,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1393 [2020-10-27 20:29:27,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:27,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 20:29:27,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:27,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 20:29:27,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:28,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:28,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:28,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:28,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:28,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:28,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:28,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:29:28,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:28,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:28,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:28,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:28,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:28,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 79 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:28,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281402426] [2020-10-27 20:29:28,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:28,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 20:29:28,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495520677] [2020-10-27 20:29:28,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 20:29:28,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:28,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 20:29:28,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 20:29:28,885 INFO L87 Difference]: Start difference. First operand 94 states and 134 transitions. Second operand 43 states. [2020-10-27 20:29:31,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:31,899 INFO L93 Difference]: Finished difference Result 104 states and 147 transitions. [2020-10-27 20:29:31,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 20:29:31,900 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 93 [2020-10-27 20:29:31,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:31,901 INFO L225 Difference]: With dead ends: 104 [2020-10-27 20:29:31,901 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 20:29:31,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2020-10-27 20:29:31,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 20:29:31,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2020-10-27 20:29:31,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-27 20:29:31,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 137 transitions. [2020-10-27 20:29:31,908 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 137 transitions. Word has length 93 [2020-10-27 20:29:31,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:31,909 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 137 transitions. [2020-10-27 20:29:31,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 20:29:31,909 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 137 transitions. [2020-10-27 20:29:31,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-27 20:29:31,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:31,910 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:31,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 20:29:31,910 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:31,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:31,910 INFO L82 PathProgramCache]: Analyzing trace with hash 2136004946, now seen corresponding path program 40 times [2020-10-27 20:29:31,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:31,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260131477] [2020-10-27 20:29:31,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:31,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:31,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:31,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:32,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:33,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:33,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-27 20:29:33,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:33,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1531 [2020-10-27 20:29:33,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:33,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 20:29:33,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:33,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 20:29:33,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:34,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:34,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:34,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:34,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:34,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:34,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:34,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:29:34,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:34,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:34,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:34,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:34,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:34,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 81 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:34,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [260131477] [2020-10-27 20:29:34,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:34,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 20:29:34,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492072031] [2020-10-27 20:29:34,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 20:29:34,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:34,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 20:29:34,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 20:29:34,739 INFO L87 Difference]: Start difference. First operand 96 states and 137 transitions. Second operand 44 states. [2020-10-27 20:29:37,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:37,984 INFO L93 Difference]: Finished difference Result 106 states and 150 transitions. [2020-10-27 20:29:37,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 20:29:37,985 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 95 [2020-10-27 20:29:37,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:37,986 INFO L225 Difference]: With dead ends: 106 [2020-10-27 20:29:37,986 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 20:29:37,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2020-10-27 20:29:37,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 20:29:37,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-10-27 20:29:37,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-27 20:29:37,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 140 transitions. [2020-10-27 20:29:37,995 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 140 transitions. Word has length 95 [2020-10-27 20:29:37,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:37,995 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 140 transitions. [2020-10-27 20:29:37,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 20:29:37,995 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 140 transitions. [2020-10-27 20:29:37,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-27 20:29:37,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:37,996 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:37,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 20:29:37,996 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:37,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:37,997 INFO L82 PathProgramCache]: Analyzing trace with hash -2136745203, now seen corresponding path program 41 times [2020-10-27 20:29:37,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:37,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103643949] [2020-10-27 20:29:37,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:38,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:38,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:38,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:39,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:39,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 20:29:39,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:39,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1634 [2020-10-27 20:29:39,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:39,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 20:29:39,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:39,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-27 20:29:39,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:40,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:40,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:40,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:40,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:40,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:40,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:40,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:29:40,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:40,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:40,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:40,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:40,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:40,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 83 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:40,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103643949] [2020-10-27 20:29:40,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:40,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-27 20:29:40,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585169649] [2020-10-27 20:29:40,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-27 20:29:40,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:40,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-27 20:29:40,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 20:29:40,991 INFO L87 Difference]: Start difference. First operand 98 states and 140 transitions. Second operand 45 states. [2020-10-27 20:29:44,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:44,206 INFO L93 Difference]: Finished difference Result 108 states and 153 transitions. [2020-10-27 20:29:44,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 20:29:44,207 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 97 [2020-10-27 20:29:44,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:44,208 INFO L225 Difference]: With dead ends: 108 [2020-10-27 20:29:44,208 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 20:29:44,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2020-10-27 20:29:44,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 20:29:44,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-10-27 20:29:44,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-27 20:29:44,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 143 transitions. [2020-10-27 20:29:44,217 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 143 transitions. Word has length 97 [2020-10-27 20:29:44,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:44,218 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 143 transitions. [2020-10-27 20:29:44,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-27 20:29:44,218 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 143 transitions. [2020-10-27 20:29:44,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 20:29:44,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:44,218 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:44,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 20:29:44,219 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:44,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:44,220 INFO L82 PathProgramCache]: Analyzing trace with hash 2034063880, now seen corresponding path program 42 times [2020-10-27 20:29:44,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:44,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571553570] [2020-10-27 20:29:44,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:44,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:44,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:44,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:44,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:45,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:45,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 20:29:45,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:45,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1755 [2020-10-27 20:29:45,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:45,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-27 20:29:45,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:45,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-27 20:29:45,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:47,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:47,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:47,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:47,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:47,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:47,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:47,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:29:47,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:47,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:47,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:47,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:47,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:47,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 85 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:47,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571553570] [2020-10-27 20:29:47,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:47,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-27 20:29:47,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112262138] [2020-10-27 20:29:47,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-27 20:29:47,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:47,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-27 20:29:47,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 20:29:47,399 INFO L87 Difference]: Start difference. First operand 100 states and 143 transitions. Second operand 46 states. [2020-10-27 20:29:50,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:50,905 INFO L93 Difference]: Finished difference Result 110 states and 156 transitions. [2020-10-27 20:29:50,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 20:29:50,906 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 99 [2020-10-27 20:29:50,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:50,907 INFO L225 Difference]: With dead ends: 110 [2020-10-27 20:29:50,908 INFO L226 Difference]: Without dead ends: 103 [2020-10-27 20:29:50,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2020-10-27 20:29:50,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-27 20:29:50,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-27 20:29:50,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-27 20:29:50,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 146 transitions. [2020-10-27 20:29:50,916 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 146 transitions. Word has length 99 [2020-10-27 20:29:50,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:50,917 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 146 transitions. [2020-10-27 20:29:50,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-27 20:29:50,917 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 146 transitions. [2020-10-27 20:29:50,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 20:29:50,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:50,918 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:50,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 20:29:50,918 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:50,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:50,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1317861821, now seen corresponding path program 43 times [2020-10-27 20:29:50,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:50,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603947273] [2020-10-27 20:29:50,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:50,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:50,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:51,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:52,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:52,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:52,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 20:29:52,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:52,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2031 [2020-10-27 20:29:52,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:52,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-27 20:29:52,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:52,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 20:29:52,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:54,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:54,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:54,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:54,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:54,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:54,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:54,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:29:54,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:54,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:54,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:54,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:54,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:54,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 87 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:54,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603947273] [2020-10-27 20:29:54,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:54,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-27 20:29:54,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065664916] [2020-10-27 20:29:54,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-27 20:29:54,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:54,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-27 20:29:54,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 20:29:54,441 INFO L87 Difference]: Start difference. First operand 102 states and 146 transitions. Second operand 47 states. [2020-10-27 20:29:58,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:58,028 INFO L93 Difference]: Finished difference Result 112 states and 159 transitions. [2020-10-27 20:29:58,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 20:29:58,028 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 101 [2020-10-27 20:29:58,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:58,030 INFO L225 Difference]: With dead ends: 112 [2020-10-27 20:29:58,030 INFO L226 Difference]: Without dead ends: 105 [2020-10-27 20:29:58,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2020-10-27 20:29:58,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-27 20:29:58,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-10-27 20:29:58,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-27 20:29:58,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 149 transitions. [2020-10-27 20:29:58,039 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 149 transitions. Word has length 101 [2020-10-27 20:29:58,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:58,039 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 149 transitions. [2020-10-27 20:29:58,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-27 20:29:58,039 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 149 transitions. [2020-10-27 20:29:58,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-27 20:29:58,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:58,040 INFO L422 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:58,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 20:29:58,040 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:58,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:58,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1292988482, now seen corresponding path program 44 times [2020-10-27 20:29:58,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:58,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517572231] [2020-10-27 20:29:58,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:58,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:58,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:58,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:58,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:59,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:59,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-27 20:29:59,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:59,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1536 [2020-10-27 20:29:59,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:59,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-27 20:29:59,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:59,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-27 20:29:59,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:01,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:01,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:01,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:01,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:01,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:01,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:01,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:30:01,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:01,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:01,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:01,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:01,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:01,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 89 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:30:01,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517572231] [2020-10-27 20:30:01,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:01,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-27 20:30:01,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222849667] [2020-10-27 20:30:01,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-27 20:30:01,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:01,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-27 20:30:01,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 20:30:01,190 INFO L87 Difference]: Start difference. First operand 104 states and 149 transitions. Second operand 48 states. [2020-10-27 20:30:04,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:04,967 INFO L93 Difference]: Finished difference Result 114 states and 162 transitions. [2020-10-27 20:30:04,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-27 20:30:04,968 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 103 [2020-10-27 20:30:04,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:04,970 INFO L225 Difference]: With dead ends: 114 [2020-10-27 20:30:04,970 INFO L226 Difference]: Without dead ends: 107 [2020-10-27 20:30:04,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2020-10-27 20:30:04,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-27 20:30:04,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-27 20:30:04,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-27 20:30:04,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 152 transitions. [2020-10-27 20:30:04,979 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 152 transitions. Word has length 103 [2020-10-27 20:30:04,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:04,979 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 152 transitions. [2020-10-27 20:30:04,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-27 20:30:04,979 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 152 transitions. [2020-10-27 20:30:04,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-27 20:30:04,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:04,980 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:04,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 20:30:04,980 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:04,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:04,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1135453817, now seen corresponding path program 45 times [2020-10-27 20:30:04,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:04,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576489095] [2020-10-27 20:30:04,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:04,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:04,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:05,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:05,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:06,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:06,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-27 20:30:06,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:30:06,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1739 [2020-10-27 20:30:06,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:06,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-27 20:30:06,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:30:06,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-27 20:30:06,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:08,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:08,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:08,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:08,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:08,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:08,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:08,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:30:08,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:08,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:08,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:08,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:08,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:08,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 91 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:30:08,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576489095] [2020-10-27 20:30:08,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:08,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-27 20:30:08,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700731483] [2020-10-27 20:30:08,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-27 20:30:08,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:08,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-27 20:30:08,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 20:30:08,364 INFO L87 Difference]: Start difference. First operand 106 states and 152 transitions. Second operand 49 states. [2020-10-27 20:30:12,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:12,297 INFO L93 Difference]: Finished difference Result 116 states and 165 transitions. [2020-10-27 20:30:12,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 20:30:12,298 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 105 [2020-10-27 20:30:12,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:12,300 INFO L225 Difference]: With dead ends: 116 [2020-10-27 20:30:12,300 INFO L226 Difference]: Without dead ends: 109 [2020-10-27 20:30:12,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2020-10-27 20:30:12,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-27 20:30:12,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-10-27 20:30:12,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-27 20:30:12,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 155 transitions. [2020-10-27 20:30:12,307 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 155 transitions. Word has length 105 [2020-10-27 20:30:12,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:12,307 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 155 transitions. [2020-10-27 20:30:12,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-27 20:30:12,307 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 155 transitions. [2020-10-27 20:30:12,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-27 20:30:12,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:12,308 INFO L422 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:12,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 20:30:12,308 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:12,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:12,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1593705868, now seen corresponding path program 46 times [2020-10-27 20:30:12,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:12,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752287279] [2020-10-27 20:30:12,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:12,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:12,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:12,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:13,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:14,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:14,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 20:30:14,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:30:14,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1768 [2020-10-27 20:30:14,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:14,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-27 20:30:14,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:30:14,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-27 20:30:14,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:15,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:15,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:15,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:15,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:15,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:15,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:15,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:30:15,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:15,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:15,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:15,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:15,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:15,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 93 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:30:15,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752287279] [2020-10-27 20:30:15,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:15,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-27 20:30:15,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933392074] [2020-10-27 20:30:15,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-27 20:30:15,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:15,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-27 20:30:15,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 20:30:15,777 INFO L87 Difference]: Start difference. First operand 108 states and 155 transitions. Second operand 50 states. [2020-10-27 20:30:19,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:19,854 INFO L93 Difference]: Finished difference Result 118 states and 168 transitions. [2020-10-27 20:30:19,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-27 20:30:19,854 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 107 [2020-10-27 20:30:19,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:19,856 INFO L225 Difference]: With dead ends: 118 [2020-10-27 20:30:19,856 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 20:30:19,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2020-10-27 20:30:19,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 20:30:19,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2020-10-27 20:30:19,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-27 20:30:19,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 158 transitions. [2020-10-27 20:30:19,865 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 158 transitions. Word has length 107 [2020-10-27 20:30:19,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:19,866 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 158 transitions. [2020-10-27 20:30:19,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-27 20:30:19,866 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 158 transitions. [2020-10-27 20:30:19,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 20:30:19,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:19,867 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:19,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 20:30:19,867 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:19,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:19,867 INFO L82 PathProgramCache]: Analyzing trace with hash -91145297, now seen corresponding path program 47 times [2020-10-27 20:30:19,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:19,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003447265] [2020-10-27 20:30:19,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:19,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:19,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:19,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:20,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:21,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:21,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-27 20:30:21,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:30:21,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1805 [2020-10-27 20:30:21,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:21,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-27 20:30:21,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:30:21,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-27 20:30:21,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:23,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:23,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:23,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:23,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:23,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:23,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:23,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:30:23,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:23,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:23,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:23,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:23,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:23,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 95 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:30:23,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003447265] [2020-10-27 20:30:23,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:23,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-27 20:30:23,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123762488] [2020-10-27 20:30:23,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-27 20:30:23,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:23,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-27 20:30:23,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 20:30:23,452 INFO L87 Difference]: Start difference. First operand 110 states and 158 transitions. Second operand 51 states. [2020-10-27 20:30:27,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:27,657 INFO L93 Difference]: Finished difference Result 120 states and 171 transitions. [2020-10-27 20:30:27,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-27 20:30:27,658 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 109 [2020-10-27 20:30:27,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:27,659 INFO L225 Difference]: With dead ends: 120 [2020-10-27 20:30:27,659 INFO L226 Difference]: Without dead ends: 113 [2020-10-27 20:30:27,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2020-10-27 20:30:27,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-27 20:30:27,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-10-27 20:30:27,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-27 20:30:27,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 161 transitions. [2020-10-27 20:30:27,668 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 161 transitions. Word has length 109 [2020-10-27 20:30:27,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:27,668 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 161 transitions. [2020-10-27 20:30:27,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-27 20:30:27,669 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 161 transitions. [2020-10-27 20:30:27,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-27 20:30:27,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:27,669 INFO L422 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:27,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 20:30:27,670 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:27,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:27,670 INFO L82 PathProgramCache]: Analyzing trace with hash 760551978, now seen corresponding path program 48 times [2020-10-27 20:30:27,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:27,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055348716] [2020-10-27 20:30:27,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:27,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:27,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:27,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:28,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:29,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:29,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 20:30:29,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:30:29,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1960 [2020-10-27 20:30:29,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:29,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-27 20:30:29,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:30:29,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-27 20:30:29,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:31,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:31,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:31,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:31,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:31,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:31,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:31,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:30:31,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:31,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:31,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:31,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:31,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:31,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 97 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:30:31,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055348716] [2020-10-27 20:30:31,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:31,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-27 20:30:31,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3718353] [2020-10-27 20:30:31,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-27 20:30:31,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:31,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-27 20:30:31,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 20:30:31,493 INFO L87 Difference]: Start difference. First operand 112 states and 161 transitions. Second operand 52 states. [2020-10-27 20:30:35,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:35,653 INFO L93 Difference]: Finished difference Result 122 states and 174 transitions. [2020-10-27 20:30:35,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-27 20:30:35,654 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 111 [2020-10-27 20:30:35,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:35,656 INFO L225 Difference]: With dead ends: 122 [2020-10-27 20:30:35,656 INFO L226 Difference]: Without dead ends: 115 [2020-10-27 20:30:35,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2020-10-27 20:30:35,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-27 20:30:35,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2020-10-27 20:30:35,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-27 20:30:35,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 164 transitions. [2020-10-27 20:30:35,662 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 164 transitions. Word has length 111 [2020-10-27 20:30:35,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:35,663 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 164 transitions. [2020-10-27 20:30:35,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-27 20:30:35,663 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 164 transitions. [2020-10-27 20:30:35,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-27 20:30:35,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:35,664 INFO L422 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:35,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 20:30:35,664 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:35,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:35,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1097120283, now seen corresponding path program 49 times [2020-10-27 20:30:35,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:35,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756882282] [2020-10-27 20:30:35,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:35,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:35,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:35,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:36,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:37,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:37,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-27 20:30:37,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:30:37,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2141 [2020-10-27 20:30:37,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:37,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-27 20:30:37,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:30:37,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-27 20:30:37,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:39,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:39,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:39,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:39,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:39,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:39,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:39,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:30:39,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:39,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:39,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:39,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:39,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 99 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:30:39,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756882282] [2020-10-27 20:30:39,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:39,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-27 20:30:39,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516146575] [2020-10-27 20:30:39,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-27 20:30:39,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:39,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-27 20:30:39,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 20:30:39,729 INFO L87 Difference]: Start difference. First operand 114 states and 164 transitions. Second operand 53 states. [2020-10-27 20:30:44,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:44,314 INFO L93 Difference]: Finished difference Result 124 states and 177 transitions. [2020-10-27 20:30:44,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-27 20:30:44,319 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 113 [2020-10-27 20:30:44,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:44,321 INFO L225 Difference]: With dead ends: 124 [2020-10-27 20:30:44,321 INFO L226 Difference]: Without dead ends: 117 [2020-10-27 20:30:44,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2020-10-27 20:30:44,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-27 20:30:44,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2020-10-27 20:30:44,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-27 20:30:44,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 167 transitions. [2020-10-27 20:30:44,329 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 167 transitions. Word has length 113 [2020-10-27 20:30:44,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:44,330 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 167 transitions. [2020-10-27 20:30:44,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-27 20:30:44,330 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 167 transitions. [2020-10-27 20:30:44,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-27 20:30:44,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:44,331 INFO L422 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:44,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 20:30:44,331 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:44,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:44,332 INFO L82 PathProgramCache]: Analyzing trace with hash 386232032, now seen corresponding path program 50 times [2020-10-27 20:30:44,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:44,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707127880] [2020-10-27 20:30:44,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:44,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:44,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:44,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:45,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:46,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:46,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-27 20:30:46,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:30:46,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2109 [2020-10-27 20:30:46,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:46,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-27 20:30:46,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:30:46,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 20:30:46,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:48,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:48,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:48,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:48,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:48,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:48,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:30:48,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:48,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:48,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:48,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:48,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:48,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 101 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:30:48,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707127880] [2020-10-27 20:30:48,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:48,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-27 20:30:48,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626500375] [2020-10-27 20:30:48,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-27 20:30:48,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:48,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-27 20:30:48,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 20:30:48,518 INFO L87 Difference]: Start difference. First operand 116 states and 167 transitions. Second operand 54 states. [2020-10-27 20:30:53,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:53,165 INFO L93 Difference]: Finished difference Result 126 states and 180 transitions. [2020-10-27 20:30:53,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-27 20:30:53,166 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 115 [2020-10-27 20:30:53,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:53,168 INFO L225 Difference]: With dead ends: 126 [2020-10-27 20:30:53,168 INFO L226 Difference]: Without dead ends: 119 [2020-10-27 20:30:53,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2020-10-27 20:30:53,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-27 20:30:53,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-10-27 20:30:53,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-27 20:30:53,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 170 transitions. [2020-10-27 20:30:53,177 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 170 transitions. Word has length 115 [2020-10-27 20:30:53,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:53,178 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 170 transitions. [2020-10-27 20:30:53,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-27 20:30:53,178 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 170 transitions. [2020-10-27 20:30:53,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-27 20:30:53,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:53,179 INFO L422 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:53,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 20:30:53,179 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:53,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:53,179 INFO L82 PathProgramCache]: Analyzing trace with hash -41335525, now seen corresponding path program 51 times [2020-10-27 20:30:53,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:53,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424725085] [2020-10-27 20:30:53,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:53,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:53,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:53,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:54,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:55,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:55,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-27 20:30:55,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:30:55,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2497 [2020-10-27 20:30:55,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:55,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-27 20:30:55,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:30:55,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-27 20:30:55,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:57,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:57,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:57,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:57,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:57,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:57,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:57,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:30:57,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:57,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:57,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:57,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:57,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:57,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 103 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:30:57,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424725085] [2020-10-27 20:30:57,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:57,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-27 20:30:57,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294650739] [2020-10-27 20:30:57,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-27 20:30:57,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:57,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-27 20:30:57,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 20:30:57,761 INFO L87 Difference]: Start difference. First operand 118 states and 170 transitions. Second operand 55 states. [2020-10-27 20:31:02,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:02,637 INFO L93 Difference]: Finished difference Result 128 states and 183 transitions. [2020-10-27 20:31:02,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-27 20:31:02,638 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 117 [2020-10-27 20:31:02,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:02,639 INFO L225 Difference]: With dead ends: 128 [2020-10-27 20:31:02,640 INFO L226 Difference]: Without dead ends: 121 [2020-10-27 20:31:02,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2020-10-27 20:31:02,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-27 20:31:02,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-10-27 20:31:02,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-27 20:31:02,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 173 transitions. [2020-10-27 20:31:02,650 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 173 transitions. Word has length 117 [2020-10-27 20:31:02,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:02,650 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 173 transitions. [2020-10-27 20:31:02,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-27 20:31:02,650 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 173 transitions. [2020-10-27 20:31:02,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-27 20:31:02,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:02,651 INFO L422 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:31:02,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 20:31:02,651 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:02,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:02,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1383102614, now seen corresponding path program 52 times [2020-10-27 20:31:02,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:02,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622295563] [2020-10-27 20:31:02,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:02,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:02,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:02,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:03,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:05,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:05,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-27 20:31:05,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:31:05,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2347 [2020-10-27 20:31:05,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:05,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-27 20:31:05,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:31:05,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-27 20:31:05,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:07,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:07,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:07,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:07,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:07,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:07,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:07,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:31:07,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:07,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:07,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:07,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:07,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:07,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 105 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:31:07,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622295563] [2020-10-27 20:31:07,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:31:07,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-27 20:31:07,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923768245] [2020-10-27 20:31:07,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-27 20:31:07,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:07,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-27 20:31:07,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-27 20:31:07,173 INFO L87 Difference]: Start difference. First operand 120 states and 173 transitions. Second operand 56 states. [2020-10-27 20:31:11,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:11,984 INFO L93 Difference]: Finished difference Result 130 states and 186 transitions. [2020-10-27 20:31:11,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-27 20:31:11,985 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 119 [2020-10-27 20:31:11,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:11,986 INFO L225 Difference]: With dead ends: 130 [2020-10-27 20:31:11,987 INFO L226 Difference]: Without dead ends: 123 [2020-10-27 20:31:11,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2020-10-27 20:31:11,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-27 20:31:11,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-10-27 20:31:11,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-27 20:31:11,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 176 transitions. [2020-10-27 20:31:11,996 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 176 transitions. Word has length 119 [2020-10-27 20:31:11,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:11,997 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 176 transitions. [2020-10-27 20:31:11,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-27 20:31:11,997 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 176 transitions. [2020-10-27 20:31:11,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-27 20:31:11,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:11,998 INFO L422 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:31:11,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-27 20:31:11,998 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:11,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:11,998 INFO L82 PathProgramCache]: Analyzing trace with hash 173586769, now seen corresponding path program 53 times [2020-10-27 20:31:11,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:11,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [244080411] [2020-10-27 20:31:11,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:12,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:12,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:13,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:14,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:14,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-27 20:31:14,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:31:14,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2465 [2020-10-27 20:31:14,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:14,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-27 20:31:14,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:31:14,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-27 20:31:14,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:16,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:16,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:16,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:16,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:16,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:16,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:16,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:31:16,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:16,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:16,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:16,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:16,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:16,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 107 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:31:16,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [244080411] [2020-10-27 20:31:16,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:31:16,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-27 20:31:16,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905632429] [2020-10-27 20:31:16,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-27 20:31:16,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:16,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-27 20:31:16,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 20:31:16,742 INFO L87 Difference]: Start difference. First operand 122 states and 176 transitions. Second operand 57 states. [2020-10-27 20:31:21,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:21,908 INFO L93 Difference]: Finished difference Result 132 states and 189 transitions. [2020-10-27 20:31:21,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-27 20:31:21,909 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 121 [2020-10-27 20:31:21,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:21,910 INFO L225 Difference]: With dead ends: 132 [2020-10-27 20:31:21,911 INFO L226 Difference]: Without dead ends: 125 [2020-10-27 20:31:21,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2020-10-27 20:31:21,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-27 20:31:21,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-10-27 20:31:21,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-27 20:31:21,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 179 transitions. [2020-10-27 20:31:21,919 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 179 transitions. Word has length 121 [2020-10-27 20:31:21,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:21,920 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 179 transitions. [2020-10-27 20:31:21,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-27 20:31:21,920 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 179 transitions. [2020-10-27 20:31:21,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-27 20:31:21,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:21,921 INFO L422 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:31:21,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-27 20:31:21,921 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:21,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:21,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1764996940, now seen corresponding path program 54 times [2020-10-27 20:31:21,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:21,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854955987] [2020-10-27 20:31:21,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:21,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:21,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:22,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:22,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:24,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:24,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-27 20:31:24,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:31:24,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2698 [2020-10-27 20:31:24,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:24,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-27 20:31:24,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:31:24,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 20:31:24,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:26,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:26,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:26,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:26,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:26,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:26,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:26,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:31:26,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:26,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:26,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:26,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:26,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:26,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 109 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:31:26,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854955987] [2020-10-27 20:31:26,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:31:26,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-27 20:31:26,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702711208] [2020-10-27 20:31:26,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-27 20:31:26,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:26,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-27 20:31:26,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-27 20:31:26,988 INFO L87 Difference]: Start difference. First operand 124 states and 179 transitions. Second operand 58 states. [2020-10-27 20:31:32,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:32,320 INFO L93 Difference]: Finished difference Result 134 states and 192 transitions. [2020-10-27 20:31:32,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-27 20:31:32,320 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 123 [2020-10-27 20:31:32,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:32,322 INFO L225 Difference]: With dead ends: 134 [2020-10-27 20:31:32,322 INFO L226 Difference]: Without dead ends: 127 [2020-10-27 20:31:32,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2020-10-27 20:31:32,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-27 20:31:32,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2020-10-27 20:31:32,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-27 20:31:32,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 182 transitions. [2020-10-27 20:31:32,330 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 182 transitions. Word has length 123 [2020-10-27 20:31:32,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:32,331 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 182 transitions. [2020-10-27 20:31:32,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-27 20:31:32,331 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 182 transitions. [2020-10-27 20:31:32,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-27 20:31:32,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:32,332 INFO L422 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:31:32,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-27 20:31:32,332 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:32,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:32,333 INFO L82 PathProgramCache]: Analyzing trace with hash 2101813895, now seen corresponding path program 55 times [2020-10-27 20:31:32,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:32,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224086114] [2020-10-27 20:31:32,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:32,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:32,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:32,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:33,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:34,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:34,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-27 20:31:34,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:31:34,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2641 [2020-10-27 20:31:34,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:34,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-27 20:31:34,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:31:34,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-27 20:31:34,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:37,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:37,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:37,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:37,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:37,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:37,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:37,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:31:37,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:37,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:37,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:37,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:37,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:37,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 111 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:31:37,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224086114] [2020-10-27 20:31:37,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:31:37,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-27 20:31:37,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529723883] [2020-10-27 20:31:37,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-27 20:31:37,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:37,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-27 20:31:37,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 20:31:37,413 INFO L87 Difference]: Start difference. First operand 126 states and 182 transitions. Second operand 59 states.