/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/watermelon.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:32:09,895 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:32:09,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:32:09,937 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:32:09,938 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:32:09,939 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:32:09,941 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:32:09,944 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:32:09,946 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:32:09,947 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:32:09,949 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:32:09,950 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:32:09,951 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:32:09,952 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:32:09,954 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:32:09,955 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:32:09,956 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:32:09,958 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:32:09,960 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:32:09,963 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:32:09,965 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:32:09,967 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:32:09,968 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:32:09,969 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:32:09,975 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:32:09,977 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:32:09,978 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:32:09,979 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:32:09,980 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:32:09,984 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:32:09,985 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:32:09,987 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:32:09,988 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:32:09,988 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:32:09,989 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:32:09,990 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:32:09,993 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:32:09,993 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:32:09,993 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:32:10,016 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:32:10,017 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:32:10,019 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 20:32:10,067 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:32:10,068 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:32:10,069 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:32:10,069 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:32:10,069 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:32:10,070 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:32:10,070 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:32:10,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:32:10,070 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:32:10,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:32:10,071 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:32:10,071 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:32:10,071 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:32:10,071 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:32:10,071 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:32:10,072 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:32:10,072 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:32:10,072 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:32:10,072 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:32:10,072 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:32:10,073 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:32:10,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:32:10,073 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:32:10,073 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:32:10,073 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:32:10,074 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:32:10,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:32:10,074 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:32:10,074 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:32:10,074 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:32:10,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:32:10,491 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:32:10,494 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:32:10,496 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:32:10,496 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:32:10,497 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/watermelon.c [2020-10-27 20:32:10,569 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c0aa84fb/7726c297454b49fb92f269b3261213a8/FLAGf67f72a0b [2020-10-27 20:32:11,294 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:32:11,295 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/watermelon.c [2020-10-27 20:32:11,305 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c0aa84fb/7726c297454b49fb92f269b3261213a8/FLAGf67f72a0b [2020-10-27 20:32:11,640 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c0aa84fb/7726c297454b49fb92f269b3261213a8 [2020-10-27 20:32:11,644 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:32:11,651 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:32:11,656 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:32:11,656 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:32:11,660 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:32:11,661 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:32:11" (1/1) ... [2020-10-27 20:32:11,665 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e6184 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:32:11, skipping insertion in model container [2020-10-27 20:32:11,666 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:32:11" (1/1) ... [2020-10-27 20:32:11,674 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:32:11,695 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:32:11,864 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:32:11,876 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:32:11,897 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:32:11,914 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:32:11,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:32:11 WrapperNode [2020-10-27 20:32:11,914 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:32:11,916 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:32:11,916 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:32:11,916 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:32:11,929 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:32:11" (1/1) ... [2020-10-27 20:32:11,929 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:32:11" (1/1) ... [2020-10-27 20:32:11,938 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:32:11" (1/1) ... [2020-10-27 20:32:11,938 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:32:11" (1/1) ... [2020-10-27 20:32:11,945 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:32:11" (1/1) ... [2020-10-27 20:32:11,951 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:32:11" (1/1) ... [2020-10-27 20:32:11,952 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:32:11" (1/1) ... [2020-10-27 20:32:11,955 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:32:11,956 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:32:11,956 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:32:11,956 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:32:11,957 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:32:11" (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 20:32:12,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:32:12,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:32:12,043 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:32:12,043 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:32:12,044 INFO L138 BoogieDeclarations]: Found implementation of procedure correct_version [2020-10-27 20:32:12,044 INFO L138 BoogieDeclarations]: Found implementation of procedure student_version [2020-10-27 20:32:12,044 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:32:12,045 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:32:12,045 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:32:12,046 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:32:12,047 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:32:12,048 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-27 20:32:12,048 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:32:12,048 INFO L130 BoogieDeclarations]: Found specification of procedure correct_version [2020-10-27 20:32:12,048 INFO L130 BoogieDeclarations]: Found specification of procedure student_version [2020-10-27 20:32:12,049 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:32:12,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:32:12,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:32:12,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:32:12,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:32:12,051 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:32:12,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:32:12,401 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:32:12,402 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 20:32:12,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:32:12 BoogieIcfgContainer [2020-10-27 20:32:12,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:32:12,406 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:32:12,406 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:32:12,411 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:32:12,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:32:11" (1/3) ... [2020-10-27 20:32:12,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f09cba5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:32:12, skipping insertion in model container [2020-10-27 20:32:12,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:32:11" (2/3) ... [2020-10-27 20:32:12,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f09cba5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:32:12, skipping insertion in model container [2020-10-27 20:32:12,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:32:12" (3/3) ... [2020-10-27 20:32:12,416 INFO L111 eAbstractionObserver]: Analyzing ICFG watermelon.c [2020-10-27 20:32:12,434 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:32:12,445 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:32:12,478 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:32:12,528 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:32:12,528 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:32:12,529 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:32:12,529 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:32:12,529 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:32:12,529 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:32:12,529 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:32:12,529 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:32:12,549 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-10-27 20:32:12,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 20:32:12,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:12,557 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:12,558 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:12,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:12,573 INFO L82 PathProgramCache]: Analyzing trace with hash 2014558618, now seen corresponding path program 1 times [2020-10-27 20:32:12,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:12,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242593220] [2020-10-27 20:32:12,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:12,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:12,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:13,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:13,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 20:32:13,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:13,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 633 [2020-10-27 20:32:13,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:13,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:32:13,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:32:13,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 20:32:13,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 20:32:13,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:13,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:13,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:13,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:13,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:13,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:13,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 20:32:13,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:13,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:13,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:13,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:13,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:32:13,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:32:13,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:13,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:13,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:13,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:32:13,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:13,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 20:32:13,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:13,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:32:13,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:13,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:32:13,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:13,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-27 20:32:13,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:13,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:13,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:13,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:32:13,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:13,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 20:32:13,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:13,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:32:13,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:13,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:32:13,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:32:13,828 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 20:32:13,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242593220] [2020-10-27 20:32:13,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:32:13,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-27 20:32:13,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89012232] [2020-10-27 20:32:13,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:32:13,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:13,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:32:13,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:32:13,857 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 13 states. [2020-10-27 20:32:14,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:14,859 INFO L93 Difference]: Finished difference Result 96 states and 120 transitions. [2020-10-27 20:32:14,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 20:32:14,861 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2020-10-27 20:32:14,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:14,872 INFO L225 Difference]: With dead ends: 96 [2020-10-27 20:32:14,873 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 20:32:14,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:32:14,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 20:32:14,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-10-27 20:32:14,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 20:32:14,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-10-27 20:32:14,931 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 26 [2020-10-27 20:32:14,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:14,932 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-10-27 20:32:14,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:32:14,932 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-10-27 20:32:14,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 20:32:14,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:14,934 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:14,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:32:14,935 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:14,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:14,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1817698132, now seen corresponding path program 1 times [2020-10-27 20:32:14,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:14,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556860319] [2020-10-27 20:32:14,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:14,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:14,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:15,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:15,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:15,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:15,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 20:32:15,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:32:15,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 367 [2020-10-27 20:32:15,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:15,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:32:15,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 20:32:15,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 20:32:15,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:32:15,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:15,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:15,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:15,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:15,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:15,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:15,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 20:32:15,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:15,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:15,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:15,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:15,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:15,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:32:15,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:15,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:15,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:15,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:32:15,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:15,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:32:15,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:15,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:15,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:15,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:15,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:15,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-27 20:32:15,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:15,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:15,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:15,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:15,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 20:32:15,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:32:15,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 20:32:15,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:15,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:32:15,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 20:32:15,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 20:32:15,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:15,429 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 20:32:15,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556860319] [2020-10-27 20:32:15,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:32:15,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:32:15,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866462270] [2020-10-27 20:32:15,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:32:15,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:15,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:32:15,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:32:15,434 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 4 states. [2020-10-27 20:32:15,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:15,585 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2020-10-27 20:32:15,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:32:15,585 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-27 20:32:15,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:15,587 INFO L225 Difference]: With dead ends: 57 [2020-10-27 20:32:15,587 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 20:32:15,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 20:32:15,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 20:32:15,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-27 20:32:15,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 20:32:15,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-10-27 20:32:15,601 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 28 [2020-10-27 20:32:15,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:15,602 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-10-27 20:32:15,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:32:15,602 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-10-27 20:32:15,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 20:32:15,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:15,603 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:15,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:32:15,604 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:15,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:15,605 INFO L82 PathProgramCache]: Analyzing trace with hash -144130904, now seen corresponding path program 1 times [2020-10-27 20:32:15,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:15,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042783535] [2020-10-27 20:32:15,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:15,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:15,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:15,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:15,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:15,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:15,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 20:32:15,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:32:15,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 319 [2020-10-27 20:32:15,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:15,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:32:15,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:32:15,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 20:32:15,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:16,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:16,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:16,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:16,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:16,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:16,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:16,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 20:32:16,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:16,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:16,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:16,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:16,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:16,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:32:16,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:16,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:16,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:16,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:16,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 20:32:16,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:32:16,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 20:32:16,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:16,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:32:16,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 20:32:16,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 20:32:16,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:16,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-27 20:32:16,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:16,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:16,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:16,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:32:16,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:16,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:32:16,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:16,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:16,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-27 20:32:16,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:16,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:16,121 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 20:32:16,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042783535] [2020-10-27 20:32:16,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:32:16,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:32:16,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984834387] [2020-10-27 20:32:16,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:32:16,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:16,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:32:16,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:32:16,127 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 4 states. [2020-10-27 20:32:16,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:16,298 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2020-10-27 20:32:16,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:32:16,301 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-27 20:32:16,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:16,302 INFO L225 Difference]: With dead ends: 72 [2020-10-27 20:32:16,304 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 20:32:16,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 20:32:16,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 20:32:16,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-10-27 20:32:16,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 20:32:16,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-10-27 20:32:16,323 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 28 [2020-10-27 20:32:16,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:16,323 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-10-27 20:32:16,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:32:16,324 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-10-27 20:32:16,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 20:32:16,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:16,326 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:16,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:32:16,326 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:16,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:16,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1412128118, now seen corresponding path program 1 times [2020-10-27 20:32:16,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:16,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728308916] [2020-10-27 20:32:16,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:16,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:16,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:16,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:16,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:16,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 20:32:16,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:32:16,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 437 [2020-10-27 20:32:16,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:16,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:32:16,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 20:32:16,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 20:32:16,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:16,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:16,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:16,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:16,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:16,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:16,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:16,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 20:32:16,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:16,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:16,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:16,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:16,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:16,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:32:16,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:16,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:16,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:16,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:32:16,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:16,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:32:16,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:16,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:16,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:16,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:16,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:16,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-27 20:32:16,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:16,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:16,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:16,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:16,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 20:32:16,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:32:16,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 20:32:16,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:16,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:32:16,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 20:32:16,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 20:32:16,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:16,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:32:16,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728308916] [2020-10-27 20:32:16,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:16,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 20:32:16,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393129800] [2020-10-27 20:32:16,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:32:16,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:16,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:32:16,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:32:16,943 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 5 states. [2020-10-27 20:32:17,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:17,148 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-10-27 20:32:17,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:32:17,149 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-10-27 20:32:17,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:17,150 INFO L225 Difference]: With dead ends: 61 [2020-10-27 20:32:17,150 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 20:32:17,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:32:17,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 20:32:17,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-27 20:32:17,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 20:32:17,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2020-10-27 20:32:17,161 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 30 [2020-10-27 20:32:17,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:17,162 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2020-10-27 20:32:17,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:32:17,162 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2020-10-27 20:32:17,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 20:32:17,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:17,164 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:17,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:32:17,164 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:17,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:17,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1138421910, now seen corresponding path program 1 times [2020-10-27 20:32:17,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:17,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909841952] [2020-10-27 20:32:17,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:17,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:17,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:17,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:17,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:17,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:17,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 20:32:17,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:32:17,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 369 [2020-10-27 20:32:17,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:17,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:32:17,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:32:17,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 20:32:17,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:17,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:17,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:17,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:17,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:17,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:17,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:17,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:32:17,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:17,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:17,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:17,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:17,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:17,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:32:17,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:17,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:17,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:17,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:17,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 20:32:17,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:32:17,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 20:32:17,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:17,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:32:17,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 20:32:17,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 20:32:17,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:17,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-27 20:32:17,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:17,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:17,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:17,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:32:17,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:17,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:32:17,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:17,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:17,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-27 20:32:17,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:17,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:17,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:32:17,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909841952] [2020-10-27 20:32:17,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:17,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 20:32:17,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191530669] [2020-10-27 20:32:17,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:32:17,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:17,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:32:17,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:32:17,676 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 5 states. [2020-10-27 20:32:17,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:17,889 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2020-10-27 20:32:17,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:32:17,889 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-10-27 20:32:17,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:17,891 INFO L225 Difference]: With dead ends: 81 [2020-10-27 20:32:17,891 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 20:32:17,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:32:17,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 20:32:17,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-27 20:32:17,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 20:32:17,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-10-27 20:32:17,902 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 30 [2020-10-27 20:32:17,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:17,902 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-10-27 20:32:17,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:32:17,902 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-10-27 20:32:17,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 20:32:17,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:17,904 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:17,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:32:17,904 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:17,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:17,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1793598696, now seen corresponding path program 2 times [2020-10-27 20:32:17,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:17,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363310735] [2020-10-27 20:32:17,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:17,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:17,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:18,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:18,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 20:32:18,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:18,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-27 20:32:18,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:18,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:32:18,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:32:18,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:32:18,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:18,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:18,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:18,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:18,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:18,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:18,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:18,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:32:18,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:18,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:18,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:18,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:18,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:18,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:32:18,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:18,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:18,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:18,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:32:18,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:18,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 20:32:18,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:18,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:32:18,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:18,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:32:18,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:18,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-27 20:32:18,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:18,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:18,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:18,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 20:32:18,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:18,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 20:32:18,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:18,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:32:18,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:32:18,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:32:18,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:18,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 20:32:18,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363310735] [2020-10-27 20:32:18,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:32:18,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 20:32:18,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015106664] [2020-10-27 20:32:18,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:32:18,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:18,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:32:18,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:32:18,220 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 8 states. [2020-10-27 20:32:18,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:18,684 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2020-10-27 20:32:18,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:32:18,685 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-27 20:32:18,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:18,687 INFO L225 Difference]: With dead ends: 62 [2020-10-27 20:32:18,687 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 20:32:18,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:32:18,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 20:32:18,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-10-27 20:32:18,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 20:32:18,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2020-10-27 20:32:18,697 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 32 [2020-10-27 20:32:18,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:18,698 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2020-10-27 20:32:18,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:32:18,698 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2020-10-27 20:32:18,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 20:32:18,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:18,699 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:18,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:32:18,700 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:18,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:18,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1125628332, now seen corresponding path program 2 times [2020-10-27 20:32:18,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:18,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562724354] [2020-10-27 20:32:18,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:18,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:18,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:18,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:18,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 20:32:18,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:18,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-27 20:32:18,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:18,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:32:18,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:32:18,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 20:32:18,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:18,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:18,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:18,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:18,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:18,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:18,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:18,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:32:18,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:18,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:18,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:18,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:18,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:18,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:32:18,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:18,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:18,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:18,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 20:32:18,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:18,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 20:32:18,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:18,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:32:18,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:18,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:32:18,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:18,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-27 20:32:18,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:18,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:18,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:18,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:32:18,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:18,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 20:32:18,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:18,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:32:18,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:32:18,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:32:18,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:18,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 20:32:18,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562724354] [2020-10-27 20:32:18,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:32:18,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 20:32:18,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11206863] [2020-10-27 20:32:18,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:32:18,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:18,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:32:18,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:32:18,975 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand 8 states. [2020-10-27 20:32:19,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:19,366 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2020-10-27 20:32:19,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:32:19,367 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-27 20:32:19,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:19,368 INFO L225 Difference]: With dead ends: 57 [2020-10-27 20:32:19,368 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 20:32:19,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:32:19,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 20:32:19,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-27 20:32:19,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 20:32:19,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-10-27 20:32:19,378 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 32 [2020-10-27 20:32:19,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:19,379 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-10-27 20:32:19,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:32:19,379 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-10-27 20:32:19,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 20:32:19,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:19,380 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:19,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:32:19,381 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:19,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:19,381 INFO L82 PathProgramCache]: Analyzing trace with hash 112794872, now seen corresponding path program 1 times [2020-10-27 20:32:19,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:19,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369644284] [2020-10-27 20:32:19,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:19,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:19,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:19,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:19,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:20,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:20,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 20:32:20,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:32:20,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 672 [2020-10-27 20:32:20,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:20,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:32:20,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:32:20,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:32:20,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:20,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:20,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:20,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:20,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:20,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:20,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:20,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:32:20,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:20,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:20,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:20,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:20,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:20,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:32:20,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:20,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:20,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:20,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 20:32:20,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:20,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 20:32:20,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:20,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:32:20,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 20:32:20,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:32:20,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:20,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-27 20:32:20,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:20,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:20,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:20,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 20:32:20,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:20,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:32:20,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:20,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:20,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:32:20,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:20,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:20,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 20:32:20,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369644284] [2020-10-27 20:32:20,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:20,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:32:20,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629824548] [2020-10-27 20:32:20,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:32:20,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:20,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:32:20,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:32:20,241 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 7 states. [2020-10-27 20:32:20,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:20,554 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2020-10-27 20:32:20,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:32:20,555 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-10-27 20:32:20,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:20,556 INFO L225 Difference]: With dead ends: 76 [2020-10-27 20:32:20,556 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 20:32:20,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:32:20,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 20:32:20,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-27 20:32:20,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 20:32:20,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2020-10-27 20:32:20,581 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 38 [2020-10-27 20:32:20,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:20,582 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2020-10-27 20:32:20,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:32:20,582 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2020-10-27 20:32:20,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 20:32:20,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:20,584 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:20,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:32:20,586 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:20,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:20,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1299616452, now seen corresponding path program 1 times [2020-10-27 20:32:20,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:20,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688434709] [2020-10-27 20:32:20,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:20,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:20,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:20,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:20,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:21,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:21,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 20:32:21,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:32:21,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 518 [2020-10-27 20:32:21,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:21,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:32:21,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 20:32:21,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:32:21,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:21,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:21,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:21,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:21,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:21,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:21,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:32:21,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:21,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:21,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:21,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:21,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:21,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:32:21,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:21,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:21,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:21,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 20:32:21,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:21,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:32:21,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:21,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:21,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:21,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:21,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:21,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-27 20:32:21,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:21,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:21,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:21,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 20:32:21,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:21,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 20:32:21,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:21,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:32:21,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 20:32:21,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:32:21,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:21,300 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 20:32:21,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688434709] [2020-10-27 20:32:21,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:21,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:32:21,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456474655] [2020-10-27 20:32:21,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:32:21,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:21,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:32:21,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:32:21,303 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand 7 states. [2020-10-27 20:32:21,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:21,644 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2020-10-27 20:32:21,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:32:21,644 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-10-27 20:32:21,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:21,645 INFO L225 Difference]: With dead ends: 63 [2020-10-27 20:32:21,645 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 20:32:21,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:32:21,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 20:32:21,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-27 20:32:21,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 20:32:21,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-10-27 20:32:21,666 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 38 [2020-10-27 20:32:21,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:21,667 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-10-27 20:32:21,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:32:21,667 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-10-27 20:32:21,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 20:32:21,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:21,673 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:21,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:32:21,674 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:21,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:21,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1692643462, now seen corresponding path program 1 times [2020-10-27 20:32:21,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:21,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051818453] [2020-10-27 20:32:21,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:21,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:21,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:21,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:21,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 20:32:21,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:21,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-27 20:32:21,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:21,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:32:21,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:32:21,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 20:32:21,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:22,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:22,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:22,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:22,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:22,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:22,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:22,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:32:22,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:22,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:22,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:22,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:22,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:22,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:32:22,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:22,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:22,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:22,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 20:32:22,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:22,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 20:32:22,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:22,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:32:22,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:22,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:32:22,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:22,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-27 20:32:22,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:22,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:22,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:22,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 20:32:22,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:22,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 20:32:22,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:22,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:32:22,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:22,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:32:22,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:22,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-27 20:32:22,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051818453] [2020-10-27 20:32:22,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:32:22,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-27 20:32:22,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045694258] [2020-10-27 20:32:22,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:32:22,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:22,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:32:22,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:32:22,153 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 13 states. [2020-10-27 20:32:22,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:22,961 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2020-10-27 20:32:22,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:32:22,962 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-27 20:32:22,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:22,963 INFO L225 Difference]: With dead ends: 62 [2020-10-27 20:32:22,963 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 20:32:22,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:32:22,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 20:32:22,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2020-10-27 20:32:22,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 20:32:22,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2020-10-27 20:32:22,973 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 38 [2020-10-27 20:32:22,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:22,973 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2020-10-27 20:32:22,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:32:22,973 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2020-10-27 20:32:22,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 20:32:22,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:22,975 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:22,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:32:22,975 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:22,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:22,976 INFO L82 PathProgramCache]: Analyzing trace with hash 654730554, now seen corresponding path program 2 times [2020-10-27 20:32:22,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:22,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559487625] [2020-10-27 20:32:22,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:22,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:22,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:23,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:23,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:23,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 20:32:23,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:32:23,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 307 [2020-10-27 20:32:23,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:23,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:32:23,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:32:23,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 20:32:23,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:23,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:23,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:23,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:23,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:23,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:23,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:23,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:32:23,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:23,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:23,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:23,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:23,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:23,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:32:23,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:23,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:23,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:23,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 20:32:23,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:23,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-27 20:32:23,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:23,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:32:23,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:23,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 20:32:23,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:23,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-27 20:32:23,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:23,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:23,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:23,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:23,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 20:32:23,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:32:23,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-27 20:32:23,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:23,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:32:23,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:32:23,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:32:23,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:23,670 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:32:23,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559487625] [2020-10-27 20:32:23,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:23,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 20:32:23,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390614276] [2020-10-27 20:32:23,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 20:32:23,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:23,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 20:32:23,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:32:23,672 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 14 states. [2020-10-27 20:32:24,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:24,396 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2020-10-27 20:32:24,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 20:32:24,397 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2020-10-27 20:32:24,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:24,398 INFO L225 Difference]: With dead ends: 71 [2020-10-27 20:32:24,398 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 20:32:24,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:32:24,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 20:32:24,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 52. [2020-10-27 20:32:24,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 20:32:24,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-10-27 20:32:24,408 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 40 [2020-10-27 20:32:24,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:24,409 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-10-27 20:32:24,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 20:32:24,409 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-10-27 20:32:24,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 20:32:24,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:24,410 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:24,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:32:24,410 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:24,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:24,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1100647526, now seen corresponding path program 2 times [2020-10-27 20:32:24,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:24,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254076629] [2020-10-27 20:32:24,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:24,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:24,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:24,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:24,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:24,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 20:32:24,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:32:24,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 254 [2020-10-27 20:32:24,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:24,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:32:24,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:32:24,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 20:32:24,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:24,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:24,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:24,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:24,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:24,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:24,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:24,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:32:24,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:24,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:24,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:24,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:24,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:24,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:32:24,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:24,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:24,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:24,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:24,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 20:32:24,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:32:24,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 20:32:24,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:24,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:32:24,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:24,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:32:24,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:24,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-27 20:32:24,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:24,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:24,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:24,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 20:32:24,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:24,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-27 20:32:24,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:24,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:32:24,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:32:24,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 20:32:24,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:24,961 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:32:24,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254076629] [2020-10-27 20:32:24,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:24,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 20:32:24,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102716035] [2020-10-27 20:32:24,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 20:32:24,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:24,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 20:32:24,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:32:24,964 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 14 states. [2020-10-27 20:32:25,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:25,735 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2020-10-27 20:32:25,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 20:32:25,736 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2020-10-27 20:32:25,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:25,736 INFO L225 Difference]: With dead ends: 65 [2020-10-27 20:32:25,737 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 20:32:25,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:32:25,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 20:32:25,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-27 20:32:25,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 20:32:25,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-10-27 20:32:25,746 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 40 [2020-10-27 20:32:25,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:25,746 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-10-27 20:32:25,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 20:32:25,746 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-10-27 20:32:25,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 20:32:25,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:25,747 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:25,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:32:25,747 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:25,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:25,748 INFO L82 PathProgramCache]: Analyzing trace with hash -525075560, now seen corresponding path program 3 times [2020-10-27 20:32:25,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:25,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066442649] [2020-10-27 20:32:25,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:25,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:25,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:26,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:26,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 20:32:26,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:26,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 275 [2020-10-27 20:32:26,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:26,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:32:26,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:32:26,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 20:32:26,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:26,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:26,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:26,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:26,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:26,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:26,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:26,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:32:26,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:26,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:26,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:26,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:26,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:26,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:32:26,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:26,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:26,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:26,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 20:32:26,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:26,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-27 20:32:26,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:26,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:32:26,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:26,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 20:32:26,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:26,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-27 20:32:26,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:26,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:26,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:26,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 20:32:26,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:26,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-27 20:32:26,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:26,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:32:26,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:32:26,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 20:32:26,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:26,532 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:32:26,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066442649] [2020-10-27 20:32:26,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:26,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 20:32:26,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334144064] [2020-10-27 20:32:26,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 20:32:26,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:26,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 20:32:26,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:32:26,535 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 16 states. [2020-10-27 20:32:28,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:28,089 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2020-10-27 20:32:28,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 20:32:28,089 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-10-27 20:32:28,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:28,090 INFO L225 Difference]: With dead ends: 74 [2020-10-27 20:32:28,091 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 20:32:28,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2020-10-27 20:32:28,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 20:32:28,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2020-10-27 20:32:28,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 20:32:28,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-10-27 20:32:28,103 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 42 [2020-10-27 20:32:28,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:28,103 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-10-27 20:32:28,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 20:32:28,103 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-10-27 20:32:28,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 20:32:28,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:28,104 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:28,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:32:28,105 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:28,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:28,105 INFO L82 PathProgramCache]: Analyzing trace with hash 8500060, now seen corresponding path program 3 times [2020-10-27 20:32:28,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:28,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584690966] [2020-10-27 20:32:28,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:28,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:28,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:28,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:28,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 20:32:28,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:28,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-10-27 20:32:28,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:28,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:32:28,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:32:28,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 20:32:28,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:28,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:28,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:28,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:28,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:28,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:28,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:28,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:32:28,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:28,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:28,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:28,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:28,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:28,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:32:28,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:28,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:28,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:28,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 20:32:28,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:28,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 20:32:28,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:28,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:32:28,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:28,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 20:32:28,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:28,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-27 20:32:28,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:28,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:28,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:28,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 20:32:28,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:28,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-27 20:32:28,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:28,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:32:28,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:32:28,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 20:32:28,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:28,824 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:32:28,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584690966] [2020-10-27 20:32:28,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:28,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 20:32:28,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590096091] [2020-10-27 20:32:28,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 20:32:28,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:28,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 20:32:28,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:32:28,830 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 16 states. [2020-10-27 20:32:30,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:30,053 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2020-10-27 20:32:30,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 20:32:30,054 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-10-27 20:32:30,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:30,056 INFO L225 Difference]: With dead ends: 73 [2020-10-27 20:32:30,056 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 20:32:30,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:32:30,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 20:32:30,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2020-10-27 20:32:30,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 20:32:30,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2020-10-27 20:32:30,068 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 42 [2020-10-27 20:32:30,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:30,069 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2020-10-27 20:32:30,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 20:32:30,069 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2020-10-27 20:32:30,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 20:32:30,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:30,070 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:30,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:32:30,070 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:30,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:30,071 INFO L82 PathProgramCache]: Analyzing trace with hash 747440798, now seen corresponding path program 4 times [2020-10-27 20:32:30,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:30,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392218645] [2020-10-27 20:32:30,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:30,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:30,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:30,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:30,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:30,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 20:32:30,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:32:30,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 379 [2020-10-27 20:32:30,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:30,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:32:30,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:32:30,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 20:32:30,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:30,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:30,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:30,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:30,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:30,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:30,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:30,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:32:30,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:30,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:30,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:30,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:30,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:30,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:32:30,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:30,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:30,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:30,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:30,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 20:32:30,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:32:30,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-27 20:32:30,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:30,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:32:30,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:30,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:32:30,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:30,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-27 20:32:30,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:30,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:30,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:30,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 20:32:30,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:30,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 20:32:30,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:30,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:32:30,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:32:30,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 20:32:30,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:30,943 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:32:30,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392218645] [2020-10-27 20:32:30,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:30,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 20:32:30,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946980043] [2020-10-27 20:32:30,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 20:32:30,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:30,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 20:32:30,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:32:30,946 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 17 states. [2020-10-27 20:32:31,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:31,934 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2020-10-27 20:32:31,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 20:32:31,935 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-10-27 20:32:31,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:31,936 INFO L225 Difference]: With dead ends: 81 [2020-10-27 20:32:31,936 INFO L226 Difference]: Without dead ends: 70 [2020-10-27 20:32:31,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:32:31,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-27 20:32:31,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 56. [2020-10-27 20:32:31,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 20:32:31,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-10-27 20:32:31,958 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 44 [2020-10-27 20:32:31,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:31,958 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-10-27 20:32:31,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 20:32:31,959 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-10-27 20:32:31,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 20:32:31,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:31,960 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:31,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 20:32:31,960 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:31,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:31,960 INFO L82 PathProgramCache]: Analyzing trace with hash -447384970, now seen corresponding path program 4 times [2020-10-27 20:32:31,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:31,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237962813] [2020-10-27 20:32:31,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:31,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:31,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:32,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:32,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:32,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 20:32:32,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:32:32,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 447 [2020-10-27 20:32:32,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:32,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:32:32,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:32:32,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 20:32:32,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:32,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:32,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:32,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:32,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:32,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:32,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:32,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:32:32,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:32,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:32,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:32,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:32,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:32,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:32:32,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:32,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:32,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:32,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 20:32:32,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:32,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 20:32:32,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:32,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:32:32,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:32,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 20:32:32,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:32,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-27 20:32:32,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:32,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:32,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:32,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:32,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 20:32:32,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:32:32,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-27 20:32:32,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:32,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:32:32,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:32:32,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 20:32:32,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:32,861 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:32:32,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237962813] [2020-10-27 20:32:32,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:32,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 20:32:32,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550629431] [2020-10-27 20:32:32,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 20:32:32,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:32,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 20:32:32,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:32:32,867 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 17 states. [2020-10-27 20:32:33,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:33,939 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2020-10-27 20:32:33,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 20:32:33,940 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-10-27 20:32:33,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:33,941 INFO L225 Difference]: With dead ends: 75 [2020-10-27 20:32:33,941 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 20:32:33,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:32:33,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 20:32:33,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2020-10-27 20:32:33,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 20:32:33,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-10-27 20:32:33,952 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 44 [2020-10-27 20:32:33,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:33,952 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-10-27 20:32:33,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 20:32:33,952 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-10-27 20:32:33,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 20:32:33,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:33,953 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:33,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 20:32:33,953 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:33,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:33,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1005060408, now seen corresponding path program 5 times [2020-10-27 20:32:33,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:33,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261183907] [2020-10-27 20:32:33,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:33,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:33,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:34,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:34,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 20:32:34,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:34,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 259 [2020-10-27 20:32:34,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:34,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:32:34,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:32:34,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 20:32:34,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:34,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:34,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:34,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:34,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:34,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:34,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:34,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:32:34,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:34,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:34,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:34,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:34,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:34,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:32:34,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:34,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:34,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:34,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 20:32:34,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:34,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-27 20:32:34,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:34,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:32:34,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:34,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:32:34,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:34,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-27 20:32:34,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:34,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:34,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:34,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 20:32:34,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:34,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-27 20:32:34,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:34,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:32:34,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:32:34,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 20:32:34,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:34,773 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:32:34,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261183907] [2020-10-27 20:32:34,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:34,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 20:32:34,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042398138] [2020-10-27 20:32:34,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 20:32:34,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:34,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 20:32:34,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2020-10-27 20:32:34,775 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 18 states. [2020-10-27 20:32:36,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:36,486 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2020-10-27 20:32:36,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 20:32:36,487 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2020-10-27 20:32:36,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:36,488 INFO L225 Difference]: With dead ends: 86 [2020-10-27 20:32:36,489 INFO L226 Difference]: Without dead ends: 76 [2020-10-27 20:32:36,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 20:32:36,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-27 20:32:36,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 58. [2020-10-27 20:32:36,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 20:32:36,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2020-10-27 20:32:36,507 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 46 [2020-10-27 20:32:36,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:36,508 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2020-10-27 20:32:36,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 20:32:36,508 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2020-10-27 20:32:36,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 20:32:36,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:36,509 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:36,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 20:32:36,509 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:36,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:36,510 INFO L82 PathProgramCache]: Analyzing trace with hash -973651844, now seen corresponding path program 5 times [2020-10-27 20:32:36,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:36,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889945212] [2020-10-27 20:32:36,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:36,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:36,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:36,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:36,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 20:32:36,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:36,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 238 [2020-10-27 20:32:36,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:36,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:32:36,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:32:36,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 20:32:36,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:36,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:36,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:36,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:36,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:36,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:36,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:36,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 20:32:36,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:36,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:36,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:36,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:36,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:36,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:32:36,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:36,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:36,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:36,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 20:32:36,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:36,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-27 20:32:36,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:36,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:32:36,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:36,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:32:36,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:37,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-27 20:32:37,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:37,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:37,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:37,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 20:32:37,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:37,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-27 20:32:37,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:37,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:32:37,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:32:37,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 20:32:37,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:37,298 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:32:37,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889945212] [2020-10-27 20:32:37,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:37,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 20:32:37,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231062101] [2020-10-27 20:32:37,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 20:32:37,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:37,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 20:32:37,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2020-10-27 20:32:37,307 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 18 states. [2020-10-27 20:32:38,019 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-27 20:32:39,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:39,031 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2020-10-27 20:32:39,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 20:32:39,032 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2020-10-27 20:32:39,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:39,033 INFO L225 Difference]: With dead ends: 81 [2020-10-27 20:32:39,033 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 20:32:39,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 20:32:39,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 20:32:39,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2020-10-27 20:32:39,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 20:32:39,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2020-10-27 20:32:39,050 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 46 [2020-10-27 20:32:39,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:39,051 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2020-10-27 20:32:39,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 20:32:39,051 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2020-10-27 20:32:39,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 20:32:39,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:39,052 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:39,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 20:32:39,052 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:39,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:39,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1038014786, now seen corresponding path program 6 times [2020-10-27 20:32:39,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:39,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179366034] [2020-10-27 20:32:39,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:39,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:39,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:39,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:39,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 20:32:39,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:32:39,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 648 [2020-10-27 20:32:39,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:39,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:32:39,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:32:39,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 20:32:39,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:39,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:39,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:39,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:39,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:39,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:39,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:39,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:32:39,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:39,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:39,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:39,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:39,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:39,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:32:39,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:39,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:39,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:39,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:39,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:32:39,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:32:39,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-27 20:32:39,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:39,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:32:39,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:39,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 20:32:39,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:40,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 20:32:40,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:40,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:40,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:40,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 20:32:40,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:40,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-27 20:32:40,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:40,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:32:40,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:32:40,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 20:32:40,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:40,280 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:32:40,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179366034] [2020-10-27 20:32:40,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:40,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 20:32:40,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057906379] [2020-10-27 20:32:40,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 20:32:40,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:40,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 20:32:40,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:32:40,284 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand 19 states. [2020-10-27 20:32:41,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:41,478 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2020-10-27 20:32:41,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 20:32:41,478 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2020-10-27 20:32:41,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:41,479 INFO L225 Difference]: With dead ends: 85 [2020-10-27 20:32:41,479 INFO L226 Difference]: Without dead ends: 74 [2020-10-27 20:32:41,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=225, Invalid=965, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:32:41,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-27 20:32:41,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 60. [2020-10-27 20:32:41,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 20:32:41,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2020-10-27 20:32:41,491 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 48 [2020-10-27 20:32:41,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:41,491 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2020-10-27 20:32:41,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 20:32:41,491 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2020-10-27 20:32:41,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 20:32:41,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:41,492 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:41,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 20:32:41,493 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:41,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:41,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1134465046, now seen corresponding path program 6 times [2020-10-27 20:32:41,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:41,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623665520] [2020-10-27 20:32:41,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:41,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:41,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:41,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:41,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:41,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 20:32:41,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:32:41,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 485 [2020-10-27 20:32:41,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:41,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:32:41,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:32:41,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 20:32:41,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:42,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:42,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:42,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:42,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:42,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:42,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:42,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:32:42,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:42,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:42,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:42,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:42,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:42,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:32:42,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:42,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:42,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:42,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 20:32:42,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:42,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-27 20:32:42,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:42,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:32:42,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:42,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:32:42,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:42,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-27 20:32:42,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:42,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:42,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:42,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:42,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:32:42,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:32:42,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-27 20:32:42,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:42,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:32:42,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:32:42,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 20:32:42,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:42,483 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:32:42,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623665520] [2020-10-27 20:32:42,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:42,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 20:32:42,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760487978] [2020-10-27 20:32:42,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 20:32:42,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:42,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 20:32:42,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:32:42,486 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 19 states. [2020-10-27 20:32:43,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:43,626 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2020-10-27 20:32:43,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 20:32:43,627 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2020-10-27 20:32:43,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:43,628 INFO L225 Difference]: With dead ends: 79 [2020-10-27 20:32:43,628 INFO L226 Difference]: Without dead ends: 66 [2020-10-27 20:32:43,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=225, Invalid=965, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:32:43,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-27 20:32:43,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2020-10-27 20:32:43,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 20:32:43,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-10-27 20:32:43,640 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 48 [2020-10-27 20:32:43,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:43,640 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-10-27 20:32:43,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 20:32:43,641 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-10-27 20:32:43,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 20:32:43,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:43,641 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:43,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 20:32:43,642 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:43,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:43,642 INFO L82 PathProgramCache]: Analyzing trace with hash -588780072, now seen corresponding path program 7 times [2020-10-27 20:32:43,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:43,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949087456] [2020-10-27 20:32:43,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:43,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:43,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:43,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:43,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 20:32:43,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:43,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 250 [2020-10-27 20:32:43,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:43,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 20:32:43,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:32:43,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 20:32:43,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:43,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:43,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:43,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:43,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:43,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:43,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:43,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:32:43,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:43,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:43,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:43,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:43,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:43,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:32:43,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:43,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:44,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:44,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:32:44,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:44,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-27 20:32:44,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:44,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:32:44,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:44,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 20:32:44,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:44,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 20:32:44,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:44,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:44,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:44,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:32:44,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:44,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-27 20:32:44,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:44,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:32:44,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:32:44,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 20:32:44,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:44,548 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:32:44,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949087456] [2020-10-27 20:32:44,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:44,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 20:32:44,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104261174] [2020-10-27 20:32:44,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 20:32:44,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:44,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 20:32:44,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-27 20:32:44,552 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 20 states. [2020-10-27 20:32:46,616 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-27 20:32:46,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:46,875 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2020-10-27 20:32:46,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 20:32:46,876 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 50 [2020-10-27 20:32:46,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:46,878 INFO L225 Difference]: With dead ends: 90 [2020-10-27 20:32:46,878 INFO L226 Difference]: Without dead ends: 80 [2020-10-27 20:32:46,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=144, Invalid=1262, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 20:32:46,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-27 20:32:46,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 62. [2020-10-27 20:32:46,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 20:32:46,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-10-27 20:32:46,894 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 50 [2020-10-27 20:32:46,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:46,895 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-10-27 20:32:46,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 20:32:46,895 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-10-27 20:32:46,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 20:32:46,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:46,896 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:46,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 20:32:46,896 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:46,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:46,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1190450332, now seen corresponding path program 7 times [2020-10-27 20:32:46,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:46,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006676797] [2020-10-27 20:32:46,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:46,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:46,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:47,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:47,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 20:32:47,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:47,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-10-27 20:32:47,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:47,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 20:32:47,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:32:47,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 20:32:47,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:47,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:47,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:47,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:47,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:47,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:47,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:47,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:32:47,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:47,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:47,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:47,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:47,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:47,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:32:47,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:47,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:47,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:47,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:32:47,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:47,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-27 20:32:47,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:47,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:32:47,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:47,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 20:32:47,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:47,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 20:32:47,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:47,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:47,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:47,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:32:47,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:47,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-27 20:32:47,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:47,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:32:47,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:32:47,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 20:32:47,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:47,849 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:32:47,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006676797] [2020-10-27 20:32:47,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:47,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 20:32:47,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761475973] [2020-10-27 20:32:47,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 20:32:47,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:47,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 20:32:47,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-27 20:32:47,851 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 20 states. [2020-10-27 20:32:50,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:50,081 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2020-10-27 20:32:50,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 20:32:50,082 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 50 [2020-10-27 20:32:50,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:50,083 INFO L225 Difference]: With dead ends: 85 [2020-10-27 20:32:50,083 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 20:32:50,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=144, Invalid=1262, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 20:32:50,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 20:32:50,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 65. [2020-10-27 20:32:50,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 20:32:50,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2020-10-27 20:32:50,096 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 50 [2020-10-27 20:32:50,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:50,096 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2020-10-27 20:32:50,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 20:32:50,096 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2020-10-27 20:32:50,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 20:32:50,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:50,097 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:50,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 20:32:50,097 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:50,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:50,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1285699106, now seen corresponding path program 8 times [2020-10-27 20:32:50,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:50,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530590205] [2020-10-27 20:32:50,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:50,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:50,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:50,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:50,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:50,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 20:32:50,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:32:50,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 532 [2020-10-27 20:32:50,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:50,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 20:32:50,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:32:50,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 20:32:50,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:50,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:50,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:50,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:50,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:50,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:50,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:50,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:32:50,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:50,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:50,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:50,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:50,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:50,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:32:50,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:50,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:50,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:50,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:50,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 20:32:50,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:32:50,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-27 20:32:50,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:50,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:32:50,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:50,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 20:32:50,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:50,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-27 20:32:50,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:50,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:51,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:51,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:32:51,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:51,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-27 20:32:51,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:51,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:32:51,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:32:51,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 20:32:51,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:51,188 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:32:51,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530590205] [2020-10-27 20:32:51,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:51,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 20:32:51,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292863344] [2020-10-27 20:32:51,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 20:32:51,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:51,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 20:32:51,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:32:51,190 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 21 states. [2020-10-27 20:32:52,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:52,619 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2020-10-27 20:32:52,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 20:32:52,620 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2020-10-27 20:32:52,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:52,621 INFO L225 Difference]: With dead ends: 89 [2020-10-27 20:32:52,621 INFO L226 Difference]: Without dead ends: 78 [2020-10-27 20:32:52,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=278, Invalid=1204, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 20:32:52,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-27 20:32:52,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 64. [2020-10-27 20:32:52,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 20:32:52,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2020-10-27 20:32:52,640 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 52 [2020-10-27 20:32:52,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:52,640 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2020-10-27 20:32:52,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 20:32:52,641 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2020-10-27 20:32:52,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 20:32:52,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:52,641 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:52,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 20:32:52,642 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:52,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:52,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1537878858, now seen corresponding path program 8 times [2020-10-27 20:32:52,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:52,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805168197] [2020-10-27 20:32:52,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:52,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:52,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:52,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:53,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:53,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 20:32:53,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:32:53,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 655 [2020-10-27 20:32:53,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:53,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 20:32:53,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:32:53,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 20:32:53,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:53,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:53,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:53,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:53,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:53,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:53,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:53,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:32:53,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:53,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:53,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:53,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:53,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:53,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:32:53,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:53,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:53,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:53,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:32:53,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:53,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-27 20:32:53,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:53,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:32:53,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:53,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 20:32:53,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:53,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 20:32:53,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:53,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:53,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:53,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:53,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 20:32:53,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:32:53,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-27 20:32:53,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:53,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:32:53,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:32:53,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 20:32:53,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:53,853 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:32:53,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805168197] [2020-10-27 20:32:53,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:53,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 20:32:53,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833580725] [2020-10-27 20:32:53,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 20:32:53,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:53,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 20:32:53,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:32:53,855 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 21 states. [2020-10-27 20:32:55,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:55,126 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2020-10-27 20:32:55,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 20:32:55,127 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2020-10-27 20:32:55,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:55,128 INFO L225 Difference]: With dead ends: 83 [2020-10-27 20:32:55,128 INFO L226 Difference]: Without dead ends: 70 [2020-10-27 20:32:55,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=278, Invalid=1204, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 20:32:55,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-27 20:32:55,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2020-10-27 20:32:55,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 20:32:55,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-10-27 20:32:55,143 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 52 [2020-10-27 20:32:55,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:55,143 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-10-27 20:32:55,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 20:32:55,143 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-10-27 20:32:55,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 20:32:55,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:55,144 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:55,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 20:32:55,147 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:55,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:55,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1705606792, now seen corresponding path program 9 times [2020-10-27 20:32:55,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:55,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256665196] [2020-10-27 20:32:55,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:55,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:55,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:55,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:55,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 20:32:55,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:55,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 301 [2020-10-27 20:32:55,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:55,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 20:32:55,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:32:55,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 20:32:55,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:55,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:55,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:55,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:55,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:55,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:55,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:55,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:32:55,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:55,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:55,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:55,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:55,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:55,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:32:55,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:55,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:55,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:55,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 20:32:55,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:55,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-27 20:32:55,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:55,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:32:55,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:55,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 20:32:55,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:55,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-27 20:32:55,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:55,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:55,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:55,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 20:32:55,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:55,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-27 20:32:55,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:55,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:32:55,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:32:55,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 20:32:55,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:56,164 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:32:56,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256665196] [2020-10-27 20:32:56,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:56,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 20:32:56,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012100428] [2020-10-27 20:32:56,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 20:32:56,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:56,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 20:32:56,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:32:56,166 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 22 states. [2020-10-27 20:32:57,767 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-27 20:32:58,168 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-27 20:32:58,445 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2020-10-27 20:32:58,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:58,882 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2020-10-27 20:32:58,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 20:32:58,883 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2020-10-27 20:32:58,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:58,884 INFO L225 Difference]: With dead ends: 90 [2020-10-27 20:32:58,884 INFO L226 Difference]: Without dead ends: 80 [2020-10-27 20:32:58,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=221, Invalid=1849, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 20:32:58,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-27 20:32:58,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-10-27 20:32:58,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-27 20:32:58,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2020-10-27 20:32:58,903 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 54 [2020-10-27 20:32:58,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:58,904 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2020-10-27 20:32:58,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 20:32:58,904 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2020-10-27 20:32:58,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 20:32:58,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:58,905 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:58,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 20:32:58,905 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:58,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:58,905 INFO L82 PathProgramCache]: Analyzing trace with hash -610979908, now seen corresponding path program 9 times [2020-10-27 20:32:58,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:58,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896574860] [2020-10-27 20:32:58,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:58,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:58,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:59,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:59,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 20:32:59,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:59,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 286 [2020-10-27 20:32:59,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:59,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 20:32:59,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:32:59,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 20:32:59,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:59,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:59,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:59,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:59,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:59,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:59,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:59,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:32:59,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:59,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:59,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:59,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:59,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:59,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:32:59,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:59,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:59,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:59,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 20:32:59,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:59,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-27 20:32:59,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:59,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:32:59,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:59,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 20:32:59,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:59,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-27 20:32:59,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:59,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:59,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:59,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 20:32:59,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:59,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-27 20:32:59,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:59,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:32:59,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:32:59,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 20:32:59,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:59,801 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:32:59,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896574860] [2020-10-27 20:32:59,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:59,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 20:32:59,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356029693] [2020-10-27 20:32:59,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 20:32:59,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:59,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 20:32:59,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:32:59,803 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 22 states. [2020-10-27 20:33:01,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:33:01,840 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2020-10-27 20:33:01,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 20:33:01,841 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2020-10-27 20:33:01,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:33:01,842 INFO L225 Difference]: With dead ends: 89 [2020-10-27 20:33:01,843 INFO L226 Difference]: Without dead ends: 77 [2020-10-27 20:33:01,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 20:33:01,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-27 20:33:01,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 69. [2020-10-27 20:33:01,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 20:33:01,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2020-10-27 20:33:01,856 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 54 [2020-10-27 20:33:01,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:33:01,856 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2020-10-27 20:33:01,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 20:33:01,857 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2020-10-27 20:33:01,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 20:33:01,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:33:01,857 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:33:01,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 20:33:01,858 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:33:01,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:33:01,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1411232766, now seen corresponding path program 10 times [2020-10-27 20:33:01,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:33:01,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400788656] [2020-10-27 20:33:01,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:33:01,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:01,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:01,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:02,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:02,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 20:33:02,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:33:02,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 873 [2020-10-27 20:33:02,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:02,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 20:33:02,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:33:02,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 20:33:02,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:02,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:33:02,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:02,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:02,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:02,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:33:02,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:02,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:33:02,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:02,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:33:02,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:02,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:33:02,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:02,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:33:02,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:02,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:02,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:02,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 20:33:02,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:02,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-27 20:33:02,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:02,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:33:02,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:02,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 20:33:02,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:03,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-27 20:33:03,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:03,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:03,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:03,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 20:33:03,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:03,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-27 20:33:03,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:03,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:33:03,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:33:03,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 20:33:03,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:03,343 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 31 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:33:03,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400788656] [2020-10-27 20:33:03,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:33:03,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 20:33:03,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273961497] [2020-10-27 20:33:03,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 20:33:03,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:33:03,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 20:33:03,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:33:03,350 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand 23 states. [2020-10-27 20:33:05,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:33:05,370 INFO L93 Difference]: Finished difference Result 93 states and 100 transitions. [2020-10-27 20:33:05,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 20:33:05,371 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 56 [2020-10-27 20:33:05,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:33:05,372 INFO L225 Difference]: With dead ends: 93 [2020-10-27 20:33:05,372 INFO L226 Difference]: Without dead ends: 82 [2020-10-27 20:33:05,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=318, Invalid=1488, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 20:33:05,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-27 20:33:05,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 68. [2020-10-27 20:33:05,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 20:33:05,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-10-27 20:33:05,385 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 56 [2020-10-27 20:33:05,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:33:05,386 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-10-27 20:33:05,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 20:33:05,386 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-10-27 20:33:05,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 20:33:05,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:33:05,387 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:33:05,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 20:33:05,387 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:33:05,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:33:05,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1066532778, now seen corresponding path program 10 times [2020-10-27 20:33:05,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:33:05,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514231236] [2020-10-27 20:33:05,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:33:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:05,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:05,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:05,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:05,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 20:33:05,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:33:05,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 572 [2020-10-27 20:33:05,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:05,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 20:33:05,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:33:05,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 20:33:05,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:06,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:33:06,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:06,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:06,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:06,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:33:06,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:06,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:33:06,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:06,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:33:06,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:06,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:33:06,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:06,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:33:06,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:06,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:06,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:06,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 20:33:06,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:06,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-27 20:33:06,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:06,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:33:06,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:06,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 20:33:06,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:06,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-27 20:33:06,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:06,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:06,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:06,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:06,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 20:33:06,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:33:06,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-27 20:33:06,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:06,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:33:06,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:33:06,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 20:33:06,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:06,572 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:33:06,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514231236] [2020-10-27 20:33:06,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:33:06,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 20:33:06,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358499673] [2020-10-27 20:33:06,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 20:33:06,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:33:06,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 20:33:06,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:33:06,574 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 23 states. [2020-10-27 20:33:07,641 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-27 20:33:08,229 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-10-27 20:33:08,663 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-10-27 20:33:08,962 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-27 20:33:09,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:33:09,294 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2020-10-27 20:33:09,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 20:33:09,295 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 56 [2020-10-27 20:33:09,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:33:09,296 INFO L225 Difference]: With dead ends: 81 [2020-10-27 20:33:09,297 INFO L226 Difference]: Without dead ends: 68 [2020-10-27 20:33:09,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=377, Invalid=1785, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 20:33:09,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-27 20:33:09,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-27 20:33:09,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 20:33:09,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-10-27 20:33:09,309 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 56 [2020-10-27 20:33:09,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:33:09,309 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-10-27 20:33:09,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 20:33:09,309 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-10-27 20:33:09,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 20:33:09,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:33:09,310 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:33:09,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 20:33:09,311 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:33:09,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:33:09,311 INFO L82 PathProgramCache]: Analyzing trace with hash 954629144, now seen corresponding path program 11 times [2020-10-27 20:33:09,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:33:09,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247237199] [2020-10-27 20:33:09,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:33:09,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:09,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:09,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:09,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 20:33:09,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:09,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 346 [2020-10-27 20:33:09,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:09,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 20:33:09,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:33:09,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 20:33:09,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:09,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:33:09,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:09,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:09,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:09,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:33:09,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:09,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 20:33:09,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:09,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:33:09,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:09,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:33:09,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:09,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:33:09,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:09,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:09,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:09,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 20:33:09,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:09,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-27 20:33:09,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:09,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:33:09,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:09,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 20:33:09,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:10,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-27 20:33:10,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:10,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:10,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:10,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 20:33:10,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:10,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-27 20:33:10,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:10,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:33:10,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:33:10,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 20:33:10,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:10,516 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:33:10,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247237199] [2020-10-27 20:33:10,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:33:10,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 20:33:10,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288340327] [2020-10-27 20:33:10,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 20:33:10,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:33:10,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 20:33:10,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:33:10,518 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 24 states. [2020-10-27 20:33:13,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:33:13,069 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2020-10-27 20:33:13,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 20:33:13,070 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 58 [2020-10-27 20:33:13,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:33:13,072 INFO L225 Difference]: With dead ends: 98 [2020-10-27 20:33:13,072 INFO L226 Difference]: Without dead ends: 88 [2020-10-27 20:33:13,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=184, Invalid=1886, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 20:33:13,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-27 20:33:13,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 70. [2020-10-27 20:33:13,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-27 20:33:13,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-10-27 20:33:13,085 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 58 [2020-10-27 20:33:13,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:33:13,085 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-10-27 20:33:13,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 20:33:13,085 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-10-27 20:33:13,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 20:33:13,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:33:13,086 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:33:13,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 20:33:13,087 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:33:13,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:33:13,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1275269596, now seen corresponding path program 11 times [2020-10-27 20:33:13,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:33:13,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247228907] [2020-10-27 20:33:13,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:33:13,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:13,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:13,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:13,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 20:33:13,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:13,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 303 [2020-10-27 20:33:13,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:13,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 20:33:13,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:33:13,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 20:33:13,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:13,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:33:13,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:13,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:13,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:13,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:33:13,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:13,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:33:13,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:13,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:33:13,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:13,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:33:13,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:13,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:33:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:13,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:13,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:13,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 20:33:13,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:13,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-27 20:33:13,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:13,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:33:13,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:13,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 20:33:13,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:13,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-27 20:33:13,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:13,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:13,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:13,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 20:33:13,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:13,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-27 20:33:13,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:13,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:33:13,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:33:13,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 20:33:13,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:14,300 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:33:14,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247228907] [2020-10-27 20:33:14,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:33:14,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 20:33:14,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652046138] [2020-10-27 20:33:14,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 20:33:14,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:33:14,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 20:33:14,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:33:14,302 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 24 states. [2020-10-27 20:33:17,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:33:17,064 INFO L93 Difference]: Finished difference Result 93 states and 100 transitions. [2020-10-27 20:33:17,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 20:33:17,065 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 58 [2020-10-27 20:33:17,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:33:17,066 INFO L225 Difference]: With dead ends: 93 [2020-10-27 20:33:17,067 INFO L226 Difference]: Without dead ends: 81 [2020-10-27 20:33:17,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=184, Invalid=1886, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 20:33:17,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-27 20:33:17,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2020-10-27 20:33:17,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 20:33:17,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2020-10-27 20:33:17,079 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 58 [2020-10-27 20:33:17,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:33:17,080 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2020-10-27 20:33:17,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 20:33:17,080 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2020-10-27 20:33:17,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 20:33:17,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:33:17,081 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:33:17,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 20:33:17,081 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:33:17,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:33:17,081 INFO L82 PathProgramCache]: Analyzing trace with hash -2008308450, now seen corresponding path program 12 times [2020-10-27 20:33:17,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:33:17,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82768320] [2020-10-27 20:33:17,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:33:17,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:17,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:17,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:17,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:17,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 20:33:17,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:33:17,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 860 [2020-10-27 20:33:17,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:17,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 20:33:17,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:33:17,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 20:33:17,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:18,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:33:18,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:18,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:18,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:18,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:33:18,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:18,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:33:18,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:18,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:33:18,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:18,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:33:18,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:18,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:33:18,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:18,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:18,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:18,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:18,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:33:18,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:33:18,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-27 20:33:18,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:18,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:33:18,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:18,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 20:33:18,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:18,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-27 20:33:18,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:18,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:18,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:18,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 20:33:18,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:18,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-27 20:33:18,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:18,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:33:18,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:33:18,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 20:33:18,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:18,662 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:33:18,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82768320] [2020-10-27 20:33:18,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:33:18,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 20:33:18,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939692089] [2020-10-27 20:33:18,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 20:33:18,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:33:18,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 20:33:18,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:33:18,665 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand 24 states. [2020-10-27 20:33:20,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:33:20,411 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2020-10-27 20:33:20,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 20:33:20,411 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 60 [2020-10-27 20:33:20,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:33:20,413 INFO L225 Difference]: With dead ends: 91 [2020-10-27 20:33:20,413 INFO L226 Difference]: Without dead ends: 80 [2020-10-27 20:33:20,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=351, Invalid=1629, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 20:33:20,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-27 20:33:20,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2020-10-27 20:33:20,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 20:33:20,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2020-10-27 20:33:20,427 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 60 [2020-10-27 20:33:20,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:33:20,428 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2020-10-27 20:33:20,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 20:33:20,428 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2020-10-27 20:33:20,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 20:33:20,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:33:20,428 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:33:20,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 20:33:20,429 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:33:20,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:33:20,429 INFO L82 PathProgramCache]: Analyzing trace with hash -85339402, now seen corresponding path program 12 times [2020-10-27 20:33:20,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:33:20,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401198200] [2020-10-27 20:33:20,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:33:20,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:20,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:20,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:21,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:21,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 20:33:21,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:33:21,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 616 [2020-10-27 20:33:21,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:21,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 20:33:21,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:33:21,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 20:33:21,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:21,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:33:21,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:21,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:21,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:21,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:33:21,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:21,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:33:21,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:21,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:33:21,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:21,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:33:21,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:21,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:33:21,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:21,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:21,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:21,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 20:33:21,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:21,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-27 20:33:21,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:21,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:33:21,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:21,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 20:33:21,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:21,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-27 20:33:21,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:21,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:21,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:21,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:21,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:33:21,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:33:21,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-27 20:33:21,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:21,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:33:21,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:33:21,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 20:33:21,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:21,714 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 56 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:33:21,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401198200] [2020-10-27 20:33:21,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:33:21,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 20:33:21,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057467329] [2020-10-27 20:33:21,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 20:33:21,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:33:21,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 20:33:21,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:33:21,716 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 25 states. [2020-10-27 20:33:24,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:33:24,188 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2020-10-27 20:33:24,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 20:33:24,189 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 60 [2020-10-27 20:33:24,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:33:24,190 INFO L225 Difference]: With dead ends: 85 [2020-10-27 20:33:24,190 INFO L226 Difference]: Without dead ends: 72 [2020-10-27 20:33:24,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=504, Invalid=2252, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 20:33:24,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-27 20:33:24,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-27 20:33:24,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 20:33:24,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2020-10-27 20:33:24,206 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 60 [2020-10-27 20:33:24,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:33:24,206 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2020-10-27 20:33:24,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 20:33:24,206 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2020-10-27 20:33:24,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 20:33:24,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:33:24,207 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:33:24,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 20:33:24,208 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:33:24,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:33:24,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1197120952, now seen corresponding path program 13 times [2020-10-27 20:33:24,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:33:24,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976375283] [2020-10-27 20:33:24,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:33:24,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:24,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:24,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:24,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 20:33:24,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:24,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 358 [2020-10-27 20:33:24,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:24,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 20:33:24,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:33:24,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 20:33:24,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:24,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:33:24,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:24,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:24,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:24,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:33:24,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:24,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:33:24,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:24,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:33:24,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:24,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:33:24,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:24,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:33:24,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:24,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:24,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:24,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:33:24,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:24,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-27 20:33:24,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:24,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:33:24,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:24,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 20:33:24,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:24,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-27 20:33:24,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:24,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:25,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:25,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:33:25,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:25,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-27 20:33:25,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:25,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:33:25,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:33:25,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 20:33:25,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:25,595 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:33:25,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976375283] [2020-10-27 20:33:25,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:33:25,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 20:33:25,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105674319] [2020-10-27 20:33:25,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 20:33:25,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:33:25,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 20:33:25,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2020-10-27 20:33:25,597 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand 26 states. [2020-10-27 20:33:27,587 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-27 20:33:27,846 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-27 20:33:28,106 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-27 20:33:28,371 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-27 20:33:28,632 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-27 20:33:29,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:33:29,381 INFO L93 Difference]: Finished difference Result 98 states and 105 transitions. [2020-10-27 20:33:29,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 20:33:29,383 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 62 [2020-10-27 20:33:29,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:33:29,384 INFO L225 Difference]: With dead ends: 98 [2020-10-27 20:33:29,385 INFO L226 Difference]: Without dead ends: 88 [2020-10-27 20:33:29,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=268, Invalid=2812, Unknown=0, NotChecked=0, Total=3080 [2020-10-27 20:33:29,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-27 20:33:29,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 74. [2020-10-27 20:33:29,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 20:33:29,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2020-10-27 20:33:29,402 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 62 [2020-10-27 20:33:29,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:33:29,402 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2020-10-27 20:33:29,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 20:33:29,403 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2020-10-27 20:33:29,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 20:33:29,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:33:29,404 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:33:29,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 20:33:29,404 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:33:29,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:33:29,406 INFO L82 PathProgramCache]: Analyzing trace with hash 746142460, now seen corresponding path program 13 times [2020-10-27 20:33:29,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:33:29,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526030540] [2020-10-27 20:33:29,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:33:29,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:29,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:29,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:29,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 20:33:29,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:29,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-10-27 20:33:29,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:29,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 20:33:29,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:33:29,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 20:33:29,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:29,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:33:29,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:29,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:29,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:29,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:33:29,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:29,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:33:29,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:29,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:33:29,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:29,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:33:29,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:29,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:33:29,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:29,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:29,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:29,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:33:29,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:29,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-27 20:33:29,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:29,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:33:29,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:29,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 20:33:29,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:30,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-27 20:33:30,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:30,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:30,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:30,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:33:30,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:30,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-27 20:33:30,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:30,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:33:30,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:33:30,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 20:33:30,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:30,686 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:33:30,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526030540] [2020-10-27 20:33:30,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:33:30,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 20:33:30,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549856837] [2020-10-27 20:33:30,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 20:33:30,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:33:30,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 20:33:30,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2020-10-27 20:33:30,689 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 26 states. [2020-10-27 20:33:33,168 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2020-10-27 20:33:33,350 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-10-27 20:33:33,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:33:33,789 INFO L93 Difference]: Finished difference Result 93 states and 99 transitions. [2020-10-27 20:33:33,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 20:33:33,790 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 62 [2020-10-27 20:33:33,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:33:33,791 INFO L225 Difference]: With dead ends: 93 [2020-10-27 20:33:33,791 INFO L226 Difference]: Without dead ends: 81 [2020-10-27 20:33:33,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=192, Invalid=2160, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 20:33:33,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-27 20:33:33,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2020-10-27 20:33:33,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 20:33:33,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2020-10-27 20:33:33,806 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 62 [2020-10-27 20:33:33,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:33:33,806 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2020-10-27 20:33:33,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 20:33:33,807 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2020-10-27 20:33:33,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 20:33:33,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:33:33,808 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:33:33,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 20:33:33,808 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:33:33,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:33:33,808 INFO L82 PathProgramCache]: Analyzing trace with hash 534928702, now seen corresponding path program 14 times [2020-10-27 20:33:33,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:33:33,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780185831] [2020-10-27 20:33:33,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:33:33,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:33,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:33,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:34,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:34,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 20:33:34,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:33:34,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 685 [2020-10-27 20:33:34,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:34,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 20:33:34,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:33:34,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 20:33:34,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:34,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:33:34,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:34,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:34,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:34,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:33:34,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:34,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:33:34,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:34,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:33:34,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:34,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:33:34,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:34,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:33:34,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:34,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:34,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:34,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:34,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 20:33:34,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:33:34,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-27 20:33:34,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:34,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:33:34,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:34,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 20:33:34,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:34,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-27 20:33:34,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:34,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:35,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:35,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:33:35,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:35,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 20:33:35,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:35,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:33:35,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:33:35,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 20:33:35,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:35,351 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:33:35,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780185831] [2020-10-27 20:33:35,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:33:35,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 20:33:35,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035012750] [2020-10-27 20:33:35,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 20:33:35,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:33:35,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 20:33:35,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:33:35,353 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand 27 states. [2020-10-27 20:33:37,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:33:37,401 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2020-10-27 20:33:37,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 20:33:37,402 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 64 [2020-10-27 20:33:37,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:33:37,403 INFO L225 Difference]: With dead ends: 101 [2020-10-27 20:33:37,403 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 20:33:37,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=473, Invalid=2077, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 20:33:37,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 20:33:37,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 76. [2020-10-27 20:33:37,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 20:33:37,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2020-10-27 20:33:37,420 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 64 [2020-10-27 20:33:37,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:33:37,420 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2020-10-27 20:33:37,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 20:33:37,420 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2020-10-27 20:33:37,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 20:33:37,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:33:37,421 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:33:37,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 20:33:37,421 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:33:37,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:33:37,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1021054102, now seen corresponding path program 14 times [2020-10-27 20:33:37,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:33:37,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516043329] [2020-10-27 20:33:37,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:33:37,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:37,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:37,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:38,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:38,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 20:33:38,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:33:38,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 590 [2020-10-27 20:33:38,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:38,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 20:33:38,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:33:38,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 20:33:38,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:38,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:33:38,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:38,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:38,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:38,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:33:38,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:38,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:33:38,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:38,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:33:38,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:38,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:33:38,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:38,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:33:38,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:38,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:38,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:38,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:33:38,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:38,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-27 20:33:38,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:38,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:33:38,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:38,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 20:33:38,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:38,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-27 20:33:38,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:38,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:38,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:38,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:38,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 20:33:38,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:33:38,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-27 20:33:38,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:38,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:33:38,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:33:38,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 20:33:38,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:38,819 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:33:38,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516043329] [2020-10-27 20:33:38,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:33:38,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 20:33:38,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458108401] [2020-10-27 20:33:38,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 20:33:38,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:33:38,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 20:33:38,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:33:38,821 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 27 states. [2020-10-27 20:33:40,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:33:40,666 INFO L93 Difference]: Finished difference Result 95 states and 101 transitions. [2020-10-27 20:33:40,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 20:33:40,667 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 64 [2020-10-27 20:33:40,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:33:40,668 INFO L225 Difference]: With dead ends: 95 [2020-10-27 20:33:40,668 INFO L226 Difference]: Without dead ends: 82 [2020-10-27 20:33:40,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=473, Invalid=2077, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 20:33:40,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-27 20:33:40,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 75. [2020-10-27 20:33:40,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-27 20:33:40,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2020-10-27 20:33:40,685 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 64 [2020-10-27 20:33:40,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:33:40,685 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2020-10-27 20:33:40,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 20:33:40,685 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2020-10-27 20:33:40,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 20:33:40,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:33:40,686 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:33:40,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 20:33:40,687 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:33:40,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:33:40,687 INFO L82 PathProgramCache]: Analyzing trace with hash -91904424, now seen corresponding path program 15 times [2020-10-27 20:33:40,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:33:40,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324153279] [2020-10-27 20:33:40,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:33:40,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:40,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:41,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:41,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 20:33:41,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:41,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 377 [2020-10-27 20:33:41,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:41,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 20:33:41,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:33:41,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 20:33:41,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:41,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:33:41,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:41,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:41,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:41,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:33:41,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:41,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:33:41,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:41,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:33:41,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:41,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:33:41,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:41,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:33:41,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:41,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:41,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:41,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 20:33:41,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:41,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-27 20:33:41,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:41,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:33:41,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:41,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 20:33:41,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:41,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-27 20:33:41,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:41,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:41,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:41,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 20:33:41,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:41,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-27 20:33:41,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:41,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:33:41,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:33:41,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 20:33:41,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:42,071 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:33:42,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324153279] [2020-10-27 20:33:42,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:33:42,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 20:33:42,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451156679] [2020-10-27 20:33:42,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 20:33:42,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:33:42,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 20:33:42,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2020-10-27 20:33:42,073 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand 28 states. [2020-10-27 20:33:44,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:33:44,752 INFO L93 Difference]: Finished difference Result 106 states and 114 transitions. [2020-10-27 20:33:44,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 20:33:44,754 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 66 [2020-10-27 20:33:44,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:33:44,755 INFO L225 Difference]: With dead ends: 106 [2020-10-27 20:33:44,755 INFO L226 Difference]: Without dead ends: 96 [2020-10-27 20:33:44,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=228, Invalid=2634, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 20:33:44,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-27 20:33:44,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 78. [2020-10-27 20:33:44,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 20:33:44,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2020-10-27 20:33:44,774 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 66 [2020-10-27 20:33:44,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:33:44,775 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2020-10-27 20:33:44,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 20:33:44,775 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2020-10-27 20:33:44,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 20:33:44,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:33:44,776 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:33:44,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 20:33:44,776 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:33:44,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:33:44,777 INFO L82 PathProgramCache]: Analyzing trace with hash 960654108, now seen corresponding path program 15 times [2020-10-27 20:33:44,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:33:44,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282908768] [2020-10-27 20:33:44,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:33:44,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:44,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:45,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:45,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 20:33:45,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:45,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 302 [2020-10-27 20:33:45,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:45,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 20:33:45,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:33:45,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 20:33:45,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:45,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:33:45,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:45,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:45,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:45,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:33:45,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:45,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:33:45,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:45,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:33:45,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:45,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:33:45,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:45,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:33:45,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:45,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:45,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:45,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 20:33:45,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:45,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-27 20:33:45,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:45,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:33:45,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:45,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 20:33:45,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:45,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-27 20:33:45,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:45,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:45,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:45,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 20:33:45,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:45,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-27 20:33:45,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:45,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:33:45,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:33:45,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 20:33:45,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:46,118 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:33:46,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282908768] [2020-10-27 20:33:46,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:33:46,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 20:33:46,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063887151] [2020-10-27 20:33:46,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 20:33:46,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:33:46,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 20:33:46,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2020-10-27 20:33:46,120 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 28 states. [2020-10-27 20:33:46,805 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-27 20:33:47,037 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-27 20:33:47,257 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-27 20:33:47,472 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-27 20:33:47,686 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-27 20:33:49,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:33:49,485 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2020-10-27 20:33:49,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 20:33:49,486 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 66 [2020-10-27 20:33:49,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:33:49,487 INFO L225 Difference]: With dead ends: 97 [2020-10-27 20:33:49,487 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 20:33:49,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=304, Invalid=3356, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 20:33:49,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 20:33:49,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2020-10-27 20:33:49,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 20:33:49,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2020-10-27 20:33:49,506 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 66 [2020-10-27 20:33:49,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:33:49,507 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2020-10-27 20:33:49,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 20:33:49,507 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2020-10-27 20:33:49,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 20:33:49,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:33:49,508 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:33:49,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 20:33:49,508 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:33:49,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:33:49,509 INFO L82 PathProgramCache]: Analyzing trace with hash 854367326, now seen corresponding path program 16 times [2020-10-27 20:33:49,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:33:49,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349405709] [2020-10-27 20:33:49,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:33:49,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:49,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:49,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:50,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:50,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 20:33:50,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:33:50,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 572 [2020-10-27 20:33:50,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:50,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 20:33:50,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:33:50,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 20:33:50,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:50,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:33:50,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:50,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:50,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:50,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:33:50,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:50,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:33:50,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:50,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:33:50,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:50,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:33:50,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:50,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:33:50,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:50,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:50,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:50,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:50,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:33:50,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:33:50,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-27 20:33:50,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:50,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:33:50,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:50,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 20:33:50,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:50,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-27 20:33:50,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:50,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:50,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:50,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 20:33:50,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:50,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-27 20:33:50,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:50,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:33:50,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:33:50,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 20:33:50,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:51,011 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:33:51,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349405709] [2020-10-27 20:33:51,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:33:51,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 20:33:51,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443669423] [2020-10-27 20:33:51,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 20:33:51,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:33:51,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 20:33:51,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:33:51,013 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand 29 states. [2020-10-27 20:33:52,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:33:52,991 INFO L93 Difference]: Finished difference Result 105 states and 112 transitions. [2020-10-27 20:33:52,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 20:33:52,992 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 68 [2020-10-27 20:33:52,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:33:52,993 INFO L225 Difference]: With dead ends: 105 [2020-10-27 20:33:52,993 INFO L226 Difference]: Without dead ends: 94 [2020-10-27 20:33:52,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=550, Invalid=2420, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 20:33:52,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-27 20:33:53,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 80. [2020-10-27 20:33:53,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-27 20:33:53,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2020-10-27 20:33:53,010 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 68 [2020-10-27 20:33:53,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:33:53,010 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2020-10-27 20:33:53,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 20:33:53,010 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2020-10-27 20:33:53,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 20:33:53,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:33:53,011 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:33:53,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 20:33:53,011 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:33:53,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:33:53,012 INFO L82 PathProgramCache]: Analyzing trace with hash -781750986, now seen corresponding path program 16 times [2020-10-27 20:33:53,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:33:53,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951139052] [2020-10-27 20:33:53,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:33:53,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:53,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:53,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:53,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:53,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 20:33:53,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:33:53,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 580 [2020-10-27 20:33:53,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:53,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 20:33:53,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:33:53,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 20:33:53,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:53,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:33:53,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:53,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:53,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:53,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:33:53,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:53,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:33:53,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:53,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:33:53,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:53,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:33:53,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:53,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:33:53,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:53,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:53,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:53,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 20:33:53,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:53,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-27 20:33:53,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:53,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:33:53,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:53,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 20:33:53,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:53,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-27 20:33:53,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:53,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:53,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:54,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:54,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:33:54,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:33:54,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-27 20:33:54,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:54,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:33:54,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:33:54,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 20:33:54,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:54,396 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:33:54,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951139052] [2020-10-27 20:33:54,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:33:54,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 20:33:54,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267145079] [2020-10-27 20:33:54,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 20:33:54,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:33:54,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 20:33:54,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2020-10-27 20:33:54,398 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 28 states. [2020-10-27 20:33:56,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:33:56,280 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2020-10-27 20:33:56,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 20:33:56,281 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 68 [2020-10-27 20:33:56,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:33:56,281 INFO L225 Difference]: With dead ends: 93 [2020-10-27 20:33:56,282 INFO L226 Difference]: Without dead ends: 80 [2020-10-27 20:33:56,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=509, Invalid=2247, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 20:33:56,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-27 20:33:56,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-27 20:33:56,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 20:33:56,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2020-10-27 20:33:56,299 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 68 [2020-10-27 20:33:56,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:33:56,300 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2020-10-27 20:33:56,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 20:33:56,300 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2020-10-27 20:33:56,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 20:33:56,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:33:56,301 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:33:56,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 20:33:56,301 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:33:56,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:33:56,302 INFO L82 PathProgramCache]: Analyzing trace with hash 155866616, now seen corresponding path program 17 times [2020-10-27 20:33:56,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:33:56,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772403705] [2020-10-27 20:33:56,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:33:56,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:56,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:56,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:56,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 20:33:56,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:56,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 295 [2020-10-27 20:33:56,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:56,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 20:33:56,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:33:56,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 20:33:56,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:56,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:33:56,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:56,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:56,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:56,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:33:56,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:56,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:33:56,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:56,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:33:56,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:56,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:33:56,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:56,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:33:56,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:56,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:56,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:56,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:33:56,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:56,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-27 20:33:56,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:56,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:33:56,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:56,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 20:33:56,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:57,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-27 20:33:57,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:57,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:57,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:57,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:33:57,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:57,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-27 20:33:57,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:57,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:33:57,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:33:57,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 20:33:57,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:57,669 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:33:57,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772403705] [2020-10-27 20:33:57,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:33:57,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 20:33:57,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017347054] [2020-10-27 20:33:57,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 20:33:57,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:33:57,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 20:33:57,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=791, Unknown=0, NotChecked=0, Total=870 [2020-10-27 20:33:57,671 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 30 states. [2020-10-27 20:34:01,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:34:01,058 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2020-10-27 20:34:01,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 20:34:01,059 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 70 [2020-10-27 20:34:01,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:34:01,060 INFO L225 Difference]: With dead ends: 110 [2020-10-27 20:34:01,060 INFO L226 Difference]: Without dead ends: 100 [2020-10-27 20:34:01,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=246, Invalid=3060, Unknown=0, NotChecked=0, Total=3306 [2020-10-27 20:34:01,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-27 20:34:01,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-27 20:34:01,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 20:34:01,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2020-10-27 20:34:01,080 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 70 [2020-10-27 20:34:01,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:34:01,081 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2020-10-27 20:34:01,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 20:34:01,081 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2020-10-27 20:34:01,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 20:34:01,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:34:01,082 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:34:01,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 20:34:01,082 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:34:01,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:34:01,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1296473540, now seen corresponding path program 17 times [2020-10-27 20:34:01,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:34:01,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83475262] [2020-10-27 20:34:01,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:34:01,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:01,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:01,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:01,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 20:34:01,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:01,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 289 [2020-10-27 20:34:01,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:01,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 20:34:01,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:34:01,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 20:34:01,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:01,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:34:01,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:01,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:01,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:01,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:34:01,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:01,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:34:01,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:01,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:34:01,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:01,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:34:01,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:01,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:34:01,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:01,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:01,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:01,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:34:01,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:01,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-27 20:34:01,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:01,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:34:01,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:01,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 20:34:01,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:01,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-27 20:34:01,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:01,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:01,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:01,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:34:01,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:01,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-27 20:34:01,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:01,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:34:01,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:34:01,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 20:34:01,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:02,495 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:34:02,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83475262] [2020-10-27 20:34:02,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:34:02,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 20:34:02,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700156484] [2020-10-27 20:34:02,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 20:34:02,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:34:02,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 20:34:02,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=788, Unknown=0, NotChecked=0, Total=870 [2020-10-27 20:34:02,497 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand 30 states. [2020-10-27 20:34:03,025 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-27 20:34:03,259 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-27 20:34:03,501 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-27 20:34:03,741 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-27 20:34:03,974 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-27 20:34:04,211 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-27 20:34:04,445 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-27 20:34:06,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:34:06,526 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2020-10-27 20:34:06,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 20:34:06,527 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 70 [2020-10-27 20:34:06,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:34:06,528 INFO L225 Difference]: With dead ends: 101 [2020-10-27 20:34:06,528 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 20:34:06,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1186 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=331, Invalid=3959, Unknown=0, NotChecked=0, Total=4290 [2020-10-27 20:34:06,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 20:34:06,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2020-10-27 20:34:06,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-27 20:34:06,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 90 transitions. [2020-10-27 20:34:06,550 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 90 transitions. Word has length 70 [2020-10-27 20:34:06,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:34:06,551 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 90 transitions. [2020-10-27 20:34:06,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 20:34:06,551 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 90 transitions. [2020-10-27 20:34:06,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 20:34:06,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:34:06,553 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:34:06,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 20:34:06,554 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:34:06,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:34:06,554 INFO L82 PathProgramCache]: Analyzing trace with hash 2105877118, now seen corresponding path program 18 times [2020-10-27 20:34:06,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:34:06,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618020424] [2020-10-27 20:34:06,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:34:06,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:06,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:06,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:07,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:07,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 20:34:07,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:34:07,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 616 [2020-10-27 20:34:07,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:07,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 20:34:07,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:34:07,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 20:34:07,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:07,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:34:07,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:07,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:07,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:07,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:34:07,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:07,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:34:07,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:07,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:34:07,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:07,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:34:07,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:07,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:34:07,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:07,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:07,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:07,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:34:07,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:07,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-27 20:34:07,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:07,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:34:07,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:07,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 20:34:07,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:07,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-27 20:34:07,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:07,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:07,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:07,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:34:07,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:07,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-27 20:34:07,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:07,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:34:07,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:34:07,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 20:34:07,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:08,199 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:34:08,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618020424] [2020-10-27 20:34:08,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:34:08,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 20:34:08,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444224676] [2020-10-27 20:34:08,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 20:34:08,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:34:08,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 20:34:08,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=738, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:34:08,201 INFO L87 Difference]: Start difference. First operand 85 states and 90 transitions. Second operand 31 states. [2020-10-27 20:34:11,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:34:11,102 INFO L93 Difference]: Finished difference Result 109 states and 116 transitions. [2020-10-27 20:34:11,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 20:34:11,102 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 72 [2020-10-27 20:34:11,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:34:11,103 INFO L225 Difference]: With dead ends: 109 [2020-10-27 20:34:11,103 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 20:34:11,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=622, Invalid=2800, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 20:34:11,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 20:34:11,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 84. [2020-10-27 20:34:11,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-27 20:34:11,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2020-10-27 20:34:11,121 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 72 [2020-10-27 20:34:11,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:34:11,121 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2020-10-27 20:34:11,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 20:34:11,121 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2020-10-27 20:34:11,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 20:34:11,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:34:11,122 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:34:11,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 20:34:11,123 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:34:11,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:34:11,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1103017174, now seen corresponding path program 18 times [2020-10-27 20:34:11,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:34:11,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729960163] [2020-10-27 20:34:11,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:34:11,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:11,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:11,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:11,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:11,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 20:34:11,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:34:11,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 839 [2020-10-27 20:34:11,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:11,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 20:34:11,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:34:11,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 20:34:11,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:12,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:34:12,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:12,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:12,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:12,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:34:12,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:12,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:34:12,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:12,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:34:12,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:12,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:34:12,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:12,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:34:12,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:12,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:12,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:12,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:34:12,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:12,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-27 20:34:12,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:12,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:34:12,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:12,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 20:34:12,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:12,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-27 20:34:12,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:12,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:12,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:12,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:12,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:34:12,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:34:12,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-27 20:34:12,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:12,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:34:12,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:34:12,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 20:34:12,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:12,861 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:34:12,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729960163] [2020-10-27 20:34:12,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:34:12,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 20:34:12,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625262] [2020-10-27 20:34:12,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 20:34:12,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:34:12,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 20:34:12,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=681, Unknown=0, NotChecked=0, Total=870 [2020-10-27 20:34:12,863 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 30 states. [2020-10-27 20:34:15,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:34:15,027 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2020-10-27 20:34:15,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 20:34:15,028 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 72 [2020-10-27 20:34:15,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:34:15,029 INFO L225 Difference]: With dead ends: 97 [2020-10-27 20:34:15,029 INFO L226 Difference]: Without dead ends: 84 [2020-10-27 20:34:15,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=589, Invalid=2603, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 20:34:15,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-27 20:34:15,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-27 20:34:15,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 20:34:15,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2020-10-27 20:34:15,045 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 72 [2020-10-27 20:34:15,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:34:15,045 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2020-10-27 20:34:15,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 20:34:15,045 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2020-10-27 20:34:15,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 20:34:15,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:34:15,046 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:34:15,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 20:34:15,047 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:34:15,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:34:15,047 INFO L82 PathProgramCache]: Analyzing trace with hash -2003080040, now seen corresponding path program 19 times [2020-10-27 20:34:15,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:34:15,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117881327] [2020-10-27 20:34:15,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:34:15,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:15,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:15,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:15,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 20:34:15,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:15,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 302 [2020-10-27 20:34:15,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:15,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 20:34:15,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:34:15,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 20:34:15,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:15,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:34:15,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:15,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:15,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:15,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:34:15,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:15,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:34:15,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:15,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:34:15,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:15,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:34:15,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:15,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:34:15,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:15,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:15,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:15,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:34:15,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:15,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-27 20:34:15,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:15,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:34:15,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:15,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 20:34:15,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:15,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-27 20:34:15,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:15,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:16,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:16,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:34:16,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:16,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-27 20:34:16,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:16,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:34:16,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:34:16,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 20:34:16,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:16,591 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:34:16,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117881327] [2020-10-27 20:34:16,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:34:16,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 20:34:16,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979468756] [2020-10-27 20:34:16,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 20:34:16,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:34:16,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 20:34:16,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=907, Unknown=0, NotChecked=0, Total=992 [2020-10-27 20:34:16,593 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 32 states. [2020-10-27 20:34:20,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:34:20,290 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2020-10-27 20:34:20,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 20:34:20,291 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 74 [2020-10-27 20:34:20,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:34:20,292 INFO L225 Difference]: With dead ends: 110 [2020-10-27 20:34:20,292 INFO L226 Difference]: Without dead ends: 100 [2020-10-27 20:34:20,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=257, Invalid=3403, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 20:34:20,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-27 20:34:20,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 86. [2020-10-27 20:34:20,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-27 20:34:20,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2020-10-27 20:34:20,309 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 74 [2020-10-27 20:34:20,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:34:20,309 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2020-10-27 20:34:20,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 20:34:20,310 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2020-10-27 20:34:20,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 20:34:20,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:34:20,310 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:34:20,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 20:34:20,311 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:34:20,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:34:20,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1186406308, now seen corresponding path program 19 times [2020-10-27 20:34:20,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:34:20,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380235863] [2020-10-27 20:34:20,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:34:20,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:20,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:20,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:20,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 20:34:20,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:20,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 308 [2020-10-27 20:34:20,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:20,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 20:34:20,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:34:20,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 20:34:20,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:20,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:34:20,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:20,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:20,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:20,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:34:20,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:20,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:34:20,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:20,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:34:20,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:20,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:34:20,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:20,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:34:20,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:20,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:20,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:20,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:34:20,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:20,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-27 20:34:20,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:20,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:34:20,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:20,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 20:34:20,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:21,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-27 20:34:21,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:21,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:21,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:21,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:34:21,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:21,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-27 20:34:21,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:21,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:34:21,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:34:21,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 20:34:21,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:21,929 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:34:21,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380235863] [2020-10-27 20:34:21,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:34:21,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 20:34:21,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944795546] [2020-10-27 20:34:21,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 20:34:21,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:34:21,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 20:34:21,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=907, Unknown=0, NotChecked=0, Total=992 [2020-10-27 20:34:21,931 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 32 states. [2020-10-27 20:34:25,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:34:25,548 INFO L93 Difference]: Finished difference Result 109 states and 116 transitions. [2020-10-27 20:34:25,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 20:34:25,554 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 74 [2020-10-27 20:34:25,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:34:25,555 INFO L225 Difference]: With dead ends: 109 [2020-10-27 20:34:25,555 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 20:34:25,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=264, Invalid=3518, Unknown=0, NotChecked=0, Total=3782 [2020-10-27 20:34:25,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 20:34:25,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 89. [2020-10-27 20:34:25,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-27 20:34:25,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 94 transitions. [2020-10-27 20:34:25,573 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 94 transitions. Word has length 74 [2020-10-27 20:34:25,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:34:25,573 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 94 transitions. [2020-10-27 20:34:25,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 20:34:25,573 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 94 transitions. [2020-10-27 20:34:25,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 20:34:25,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:34:25,575 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:34:25,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 20:34:25,575 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:34:25,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:34:25,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1143558242, now seen corresponding path program 20 times [2020-10-27 20:34:25,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:34:25,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271529805] [2020-10-27 20:34:25,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:34:25,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:25,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:25,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:26,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:26,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 20:34:26,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:34:26,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 646 [2020-10-27 20:34:26,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:26,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 20:34:26,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:34:26,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 20:34:26,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:26,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:34:26,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:26,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:26,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:26,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:34:26,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:26,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:34:26,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:26,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:34:26,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:26,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:34:26,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:26,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:34:26,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:26,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:26,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:26,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 20:34:26,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:26,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-27 20:34:26,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:26,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:34:26,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:26,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 20:34:26,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:26,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-27 20:34:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:26,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:26,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:26,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:34:26,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:26,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-27 20:34:26,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:26,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:34:26,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:34:26,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 20:34:26,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:27,313 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:34:27,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271529805] [2020-10-27 20:34:27,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:34:27,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 20:34:27,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223026081] [2020-10-27 20:34:27,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 20:34:27,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:34:27,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 20:34:27,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=824, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 20:34:27,315 INFO L87 Difference]: Start difference. First operand 89 states and 94 transitions. Second operand 33 states. [2020-10-27 20:34:29,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:34:29,711 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2020-10-27 20:34:29,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 20:34:29,712 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 76 [2020-10-27 20:34:29,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:34:29,713 INFO L225 Difference]: With dead ends: 113 [2020-10-27 20:34:29,713 INFO L226 Difference]: Without dead ends: 102 [2020-10-27 20:34:29,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=722, Invalid=3184, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 20:34:29,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-27 20:34:29,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 88. [2020-10-27 20:34:29,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-27 20:34:29,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2020-10-27 20:34:29,742 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 76 [2020-10-27 20:34:29,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:34:29,742 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2020-10-27 20:34:29,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 20:34:29,743 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2020-10-27 20:34:29,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 20:34:29,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:34:29,743 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:34:29,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 20:34:29,744 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:34:29,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:34:29,744 INFO L82 PathProgramCache]: Analyzing trace with hash 824484726, now seen corresponding path program 20 times [2020-10-27 20:34:29,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:34:29,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923528041] [2020-10-27 20:34:29,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:34:29,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:29,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:29,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:31,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:31,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 20:34:31,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:34:31,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1248 [2020-10-27 20:34:31,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:31,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 20:34:31,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:34:31,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 20:34:31,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:31,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:34:31,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:31,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:31,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:31,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:34:31,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:31,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:34:31,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:31,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:34:31,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:31,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:34:31,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:31,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:34:31,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:31,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:31,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:31,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:34:31,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:31,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-27 20:34:31,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:31,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:34:31,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:31,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 20:34:31,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:31,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-27 20:34:31,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:31,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:31,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:31,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:31,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 20:34:31,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:34:31,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-27 20:34:31,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:31,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:34:31,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:34:31,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 20:34:31,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:31,964 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:34:31,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923528041] [2020-10-27 20:34:31,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:34:31,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 20:34:31,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697394805] [2020-10-27 20:34:31,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 20:34:31,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:34:31,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 20:34:31,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=775, Unknown=0, NotChecked=0, Total=992 [2020-10-27 20:34:31,966 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 32 states. [2020-10-27 20:34:34,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:34:34,124 INFO L93 Difference]: Finished difference Result 101 states and 105 transitions. [2020-10-27 20:34:34,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 20:34:34,124 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 76 [2020-10-27 20:34:34,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:34:34,125 INFO L225 Difference]: With dead ends: 101 [2020-10-27 20:34:34,125 INFO L226 Difference]: Without dead ends: 88 [2020-10-27 20:34:34,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=675, Invalid=2985, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 20:34:34,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-27 20:34:34,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-27 20:34:34,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 20:34:34,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2020-10-27 20:34:34,148 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 76 [2020-10-27 20:34:34,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:34:34,148 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2020-10-27 20:34:34,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 20:34:34,148 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2020-10-27 20:34:34,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 20:34:34,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:34:34,149 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:34:34,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 20:34:34,149 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:34:34,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:34:34,150 INFO L82 PathProgramCache]: Analyzing trace with hash -948196808, now seen corresponding path program 21 times [2020-10-27 20:34:34,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:34:34,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480640015] [2020-10-27 20:34:34,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:34:34,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:34,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:34,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:34,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 20:34:34,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:34,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 478 [2020-10-27 20:34:34,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:34,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 20:34:34,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:34:34,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 20:34:34,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:34,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:34:34,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:34,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:34,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:34,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:34:34,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:34,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:34:34,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:34,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:34:34,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:34,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:34:34,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:34,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:34:34,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:34,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:34,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:34,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 20:34:34,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:34,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-27 20:34:34,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:34,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:34:34,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:34,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 20:34:34,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:35,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-27 20:34:35,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:35,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:35,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:35,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 20:34:35,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:35,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-27 20:34:35,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:35,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:34:35,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:34:35,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 20:34:35,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:36,174 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:34:36,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480640015] [2020-10-27 20:34:36,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:34:36,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 20:34:36,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660074508] [2020-10-27 20:34:36,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 20:34:36,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:34:36,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 20:34:36,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1044, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 20:34:36,176 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand 34 states. [2020-10-27 20:34:40,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:34:40,785 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2020-10-27 20:34:40,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 20:34:40,786 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 78 [2020-10-27 20:34:40,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:34:40,788 INFO L225 Difference]: With dead ends: 118 [2020-10-27 20:34:40,788 INFO L226 Difference]: Without dead ends: 108 [2020-10-27 20:34:40,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=269, Invalid=4021, Unknown=0, NotChecked=0, Total=4290 [2020-10-27 20:34:40,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-27 20:34:40,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 90. [2020-10-27 20:34:40,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-27 20:34:40,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2020-10-27 20:34:40,810 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 78 [2020-10-27 20:34:40,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:34:40,810 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2020-10-27 20:34:40,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 20:34:40,811 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2020-10-27 20:34:40,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 20:34:40,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:34:40,812 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:34:40,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 20:34:40,812 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:34:40,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:34:40,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1452563076, now seen corresponding path program 21 times [2020-10-27 20:34:40,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:34:40,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124656325] [2020-10-27 20:34:40,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:34:40,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:40,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:41,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:41,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 20:34:41,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:41,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 344 [2020-10-27 20:34:41,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:41,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 20:34:41,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:34:41,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 20:34:41,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:41,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:34:41,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:41,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:41,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:41,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:34:41,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:41,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:34:41,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:41,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:34:41,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:41,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:34:41,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:41,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:34:41,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:41,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:41,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:41,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 20:34:41,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:41,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-27 20:34:41,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:41,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:34:41,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:41,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 20:34:41,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:41,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-27 20:34:41,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:41,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:41,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:41,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 20:34:41,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:41,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-27 20:34:41,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:41,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:34:41,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:34:41,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 20:34:41,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:42,793 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:34:42,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124656325] [2020-10-27 20:34:42,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:34:42,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 20:34:42,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989703351] [2020-10-27 20:34:42,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 20:34:42,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:34:42,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 20:34:42,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1044, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 20:34:42,795 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand 34 states. [2020-10-27 20:34:44,665 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-27 20:34:47,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:34:47,532 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2020-10-27 20:34:47,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 20:34:47,533 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 78 [2020-10-27 20:34:47,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:34:47,535 INFO L225 Difference]: With dead ends: 113 [2020-10-27 20:34:47,535 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 20:34:47,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=269, Invalid=4021, Unknown=0, NotChecked=0, Total=4290 [2020-10-27 20:34:47,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 20:34:47,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 93. [2020-10-27 20:34:47,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 20:34:47,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 98 transitions. [2020-10-27 20:34:47,558 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 98 transitions. Word has length 78 [2020-10-27 20:34:47,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:34:47,558 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 98 transitions. [2020-10-27 20:34:47,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 20:34:47,559 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 98 transitions. [2020-10-27 20:34:47,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 20:34:47,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:34:47,559 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:34:47,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 20:34:47,560 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:34:47,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:34:47,560 INFO L82 PathProgramCache]: Analyzing trace with hash 102499262, now seen corresponding path program 22 times [2020-10-27 20:34:47,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:34:47,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470154510] [2020-10-27 20:34:47,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:34:47,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:47,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:47,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:48,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:48,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 20:34:48,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:34:48,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 489 [2020-10-27 20:34:48,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:48,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 20:34:48,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:34:48,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 20:34:48,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:48,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:34:48,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:48,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:48,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:48,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:34:48,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:48,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:34:48,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:48,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:34:48,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:48,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:34:48,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:48,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:34:48,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:48,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:48,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:48,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 20:34:48,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:48,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-27 20:34:48,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:48,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 20:34:48,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:48,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 20:34:48,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:48,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-27 20:34:48,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:48,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:48,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:48,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 20:34:48,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:48,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-27 20:34:48,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:48,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:34:48,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:34:48,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 20:34:48,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:49,264 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 132 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:34:49,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470154510] [2020-10-27 20:34:49,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:34:49,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 20:34:49,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350317613] [2020-10-27 20:34:49,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 20:34:49,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:34:49,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 20:34:49,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=965, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:34:49,266 INFO L87 Difference]: Start difference. First operand 93 states and 98 transitions. Second operand 35 states. [2020-10-27 20:34:53,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:34:53,990 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2020-10-27 20:34:53,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 20:34:53,993 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 80 [2020-10-27 20:34:53,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:34:53,994 INFO L225 Difference]: With dead ends: 106 [2020-10-27 20:34:53,994 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 20:34:53,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1024, Invalid=4828, Unknown=0, NotChecked=0, Total=5852 [2020-10-27 20:34:53,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 20:34:54,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2020-10-27 20:34:54,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 20:34:54,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2020-10-27 20:34:54,012 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 80 [2020-10-27 20:34:54,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:34:54,012 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2020-10-27 20:34:54,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 20:34:54,012 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2020-10-27 20:34:54,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 20:34:54,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:34:54,013 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:34:54,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 20:34:54,014 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:34:54,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:34:54,014 INFO L82 PathProgramCache]: Analyzing trace with hash 954988822, now seen corresponding path program 22 times [2020-10-27 20:34:54,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:34:54,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128133057] [2020-10-27 20:34:54,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:34:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:54,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:54,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:54,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:54,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 20:34:54,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:34:54,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 731 [2020-10-27 20:34:54,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:54,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 20:34:54,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:34:54,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 20:34:54,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:54,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:34:54,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:54,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:54,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:54,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:34:54,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:54,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:34:54,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:54,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:34:54,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:54,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:34:54,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:54,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:34:54,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:54,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:54,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:54,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 20:34:54,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:54,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-27 20:34:54,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:54,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:34:54,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:54,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 20:34:54,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:55,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-27 20:34:55,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:55,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:55,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:55,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:55,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 20:34:55,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:34:55,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-10-27 20:34:55,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:55,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:34:55,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:34:55,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 20:34:55,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:56,036 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:34:56,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128133057] [2020-10-27 20:34:56,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:34:56,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 20:34:56,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164207895] [2020-10-27 20:34:56,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 20:34:56,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:34:56,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 20:34:56,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=875, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 20:34:56,038 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 34 states. [2020-10-27 20:34:58,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:34:58,556 INFO L93 Difference]: Finished difference Result 105 states and 109 transitions. [2020-10-27 20:34:58,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 20:34:58,557 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 80 [2020-10-27 20:34:58,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:34:58,558 INFO L225 Difference]: With dead ends: 105 [2020-10-27 20:34:58,558 INFO L226 Difference]: Without dead ends: 92 [2020-10-27 20:34:58,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=767, Invalid=3393, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 20:34:58,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-27 20:34:58,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-27 20:34:58,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 20:34:58,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2020-10-27 20:34:58,581 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 80 [2020-10-27 20:34:58,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:34:58,582 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2020-10-27 20:34:58,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 20:34:58,582 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2020-10-27 20:34:58,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 20:34:58,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:34:58,583 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:34:58,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 20:34:58,583 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:34:58,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:34:58,583 INFO L82 PathProgramCache]: Analyzing trace with hash 721276632, now seen corresponding path program 23 times [2020-10-27 20:34:58,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:34:58,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666905110] [2020-10-27 20:34:58,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:34:58,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:58,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:59,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:59,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 20:34:59,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:59,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 426 [2020-10-27 20:34:59,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:59,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 20:34:59,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:34:59,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 20:34:59,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:59,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:34:59,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:59,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:59,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:59,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:34:59,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:59,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:34:59,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:59,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:34:59,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:59,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:34:59,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:59,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:34:59,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:59,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:59,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:59,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 20:34:59,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:59,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-27 20:34:59,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:59,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 20:34:59,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:59,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 20:34:59,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:59,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-27 20:34:59,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:59,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:59,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:59,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 20:34:59,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:59,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-27 20:34:59,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:59,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 20:34:59,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:34:59,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 20:34:59,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:00,531 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:00,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666905110] [2020-10-27 20:35:00,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:35:00,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 20:35:00,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211692543] [2020-10-27 20:35:00,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 20:35:00,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:00,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 20:35:00,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1177, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 20:35:00,533 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand 36 states. [2020-10-27 20:35:05,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:05,781 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2020-10-27 20:35:05,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 20:35:05,782 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 82 [2020-10-27 20:35:05,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:05,783 INFO L225 Difference]: With dead ends: 122 [2020-10-27 20:35:05,783 INFO L226 Difference]: Without dead ends: 112 [2020-10-27 20:35:05,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=286, Invalid=4544, Unknown=0, NotChecked=0, Total=4830 [2020-10-27 20:35:05,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-27 20:35:05,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-10-27 20:35:05,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 20:35:05,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2020-10-27 20:35:05,808 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 82 [2020-10-27 20:35:05,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:05,809 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2020-10-27 20:35:05,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 20:35:05,809 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2020-10-27 20:35:05,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 20:35:05,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:05,810 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:05,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 20:35:05,810 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:05,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:05,810 INFO L82 PathProgramCache]: Analyzing trace with hash 2007789980, now seen corresponding path program 23 times [2020-10-27 20:35:05,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:05,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997212316] [2020-10-27 20:35:05,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:05,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:06,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:06,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 20:35:06,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:06,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 544 [2020-10-27 20:35:06,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:06,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 20:35:06,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:35:06,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 20:35:06,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:06,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:06,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:06,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:06,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:06,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:06,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 20:35:06,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:06,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:06,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:06,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:06,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:06,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:35:06,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:06,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:06,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:06,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 20:35:06,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:06,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-27 20:35:06,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:06,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 20:35:06,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:06,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 20:35:06,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:07,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-27 20:35:07,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:07,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:07,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:07,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 20:35:07,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:07,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-27 20:35:07,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:07,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 20:35:07,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:35:07,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 20:35:07,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:08,095 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:08,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997212316] [2020-10-27 20:35:08,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:35:08,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 20:35:08,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095903447] [2020-10-27 20:35:08,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 20:35:08,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:08,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 20:35:08,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1177, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 20:35:08,097 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 36 states. [2020-10-27 20:35:13,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:13,250 INFO L93 Difference]: Finished difference Result 117 states and 124 transitions. [2020-10-27 20:35:13,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 20:35:13,251 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 82 [2020-10-27 20:35:13,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:13,252 INFO L225 Difference]: With dead ends: 117 [2020-10-27 20:35:13,252 INFO L226 Difference]: Without dead ends: 105 [2020-10-27 20:35:13,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=286, Invalid=4544, Unknown=0, NotChecked=0, Total=4830 [2020-10-27 20:35:13,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-27 20:35:13,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 97. [2020-10-27 20:35:13,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 20:35:13,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 102 transitions. [2020-10-27 20:35:13,271 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 102 transitions. Word has length 82 [2020-10-27 20:35:13,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:13,271 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 102 transitions. [2020-10-27 20:35:13,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 20:35:13,272 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 102 transitions. [2020-10-27 20:35:13,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 20:35:13,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:13,272 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:13,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 20:35:13,272 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:13,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:13,273 INFO L82 PathProgramCache]: Analyzing trace with hash 748674782, now seen corresponding path program 24 times [2020-10-27 20:35:13,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:13,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506278331] [2020-10-27 20:35:13,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:13,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:13,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:13,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:14,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:14,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 20:35:14,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:35:14,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 776 [2020-10-27 20:35:14,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:14,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 20:35:14,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:35:14,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 20:35:14,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:14,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:14,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:14,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:14,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:14,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:14,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:14,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:35:14,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:14,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:14,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:14,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:14,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:14,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:35:14,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:14,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:14,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:14,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 20:35:14,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:14,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-27 20:35:14,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:14,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 20:35:14,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:14,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 20:35:14,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:14,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-27 20:35:14,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:14,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:14,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:14,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 20:35:14,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:14,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-27 20:35:14,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:14,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 20:35:14,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:35:14,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 20:35:14,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:15,446 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 157 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:15,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506278331] [2020-10-27 20:35:15,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:35:15,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 20:35:15,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115709876] [2020-10-27 20:35:15,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 20:35:15,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:15,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 20:35:15,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1062, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 20:35:15,448 INFO L87 Difference]: Start difference. First operand 97 states and 102 transitions. Second operand 37 states. [2020-10-27 20:35:18,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:18,513 INFO L93 Difference]: Finished difference Result 121 states and 128 transitions. [2020-10-27 20:35:18,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 20:35:18,514 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 84 [2020-10-27 20:35:18,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:18,515 INFO L225 Difference]: With dead ends: 121 [2020-10-27 20:35:18,515 INFO L226 Difference]: Without dead ends: 110 [2020-10-27 20:35:18,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=892, Invalid=4078, Unknown=0, NotChecked=0, Total=4970 [2020-10-27 20:35:18,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-27 20:35:18,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 96. [2020-10-27 20:35:18,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-27 20:35:18,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2020-10-27 20:35:18,538 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 84 [2020-10-27 20:35:18,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:18,538 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2020-10-27 20:35:18,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 20:35:18,539 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2020-10-27 20:35:18,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 20:35:18,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:18,539 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:18,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-27 20:35:18,539 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:18,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:18,540 INFO L82 PathProgramCache]: Analyzing trace with hash -998804042, now seen corresponding path program 24 times [2020-10-27 20:35:18,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:18,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946174128] [2020-10-27 20:35:18,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:18,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:18,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:18,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:19,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:19,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 20:35:19,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:35:19,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 883 [2020-10-27 20:35:19,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:19,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 20:35:19,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:35:19,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 20:35:19,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:19,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:19,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:19,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:19,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:19,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:19,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:19,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:35:19,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:19,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:19,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:19,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:19,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:19,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:35:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:19,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:19,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:19,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 20:35:19,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:19,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-27 20:35:19,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:19,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 20:35:19,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:19,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 20:35:19,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:20,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-27 20:35:20,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:20,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:20,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:20,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:20,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 20:35:20,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:35:20,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-27 20:35:20,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:20,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 20:35:20,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:35:20,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 20:35:20,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:20,858 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:20,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946174128] [2020-10-27 20:35:20,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:35:20,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 20:35:20,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981677643] [2020-10-27 20:35:20,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 20:35:20,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:20,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 20:35:20,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=981, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 20:35:20,860 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand 36 states. [2020-10-27 20:35:23,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:23,796 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2020-10-27 20:35:23,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 20:35:23,797 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 84 [2020-10-27 20:35:23,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:23,799 INFO L225 Difference]: With dead ends: 109 [2020-10-27 20:35:23,799 INFO L226 Difference]: Without dead ends: 96 [2020-10-27 20:35:23,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=865, Invalid=3827, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 20:35:23,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-27 20:35:23,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-27 20:35:23,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 20:35:23,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2020-10-27 20:35:23,824 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 84 [2020-10-27 20:35:23,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:23,824 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2020-10-27 20:35:23,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 20:35:23,824 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2020-10-27 20:35:23,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 20:35:23,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:23,825 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:23,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-27 20:35:23,825 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:23,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:23,826 INFO L82 PathProgramCache]: Analyzing trace with hash 172268152, now seen corresponding path program 25 times [2020-10-27 20:35:23,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:23,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336789413] [2020-10-27 20:35:23,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:23,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:23,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:24,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:24,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 20:35:24,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:24,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 450 [2020-10-27 20:35:24,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:24,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 20:35:24,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:35:24,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 20:35:24,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:24,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:24,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:24,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:24,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:24,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:24,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:24,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:35:24,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:24,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:24,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:24,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:24,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:24,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:35:24,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:24,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:24,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:24,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 20:35:24,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:24,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-27 20:35:24,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:24,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 20:35:24,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:24,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 20:35:24,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:25,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-27 20:35:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:25,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:25,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:25,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 20:35:25,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:25,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-27 20:35:25,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:25,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 20:35:25,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:35:25,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 20:35:25,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:26,555 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:26,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336789413] [2020-10-27 20:35:26,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:35:26,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 20:35:26,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395180685] [2020-10-27 20:35:26,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 20:35:26,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:26,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 20:35:26,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1316, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 20:35:26,557 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand 38 states. [2020-10-27 20:35:30,792 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-27 20:35:31,145 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-27 20:35:31,504 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-27 20:35:31,867 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-27 20:35:32,240 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-27 20:35:32,604 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-27 20:35:32,957 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-27 20:35:33,317 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-27 20:35:33,674 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-27 20:35:34,038 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-27 20:35:34,407 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-27 20:35:34,763 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-27 20:35:35,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:35,719 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2020-10-27 20:35:35,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-27 20:35:35,721 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 86 [2020-10-27 20:35:35,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:35,722 INFO L225 Difference]: With dead ends: 122 [2020-10-27 20:35:35,723 INFO L226 Difference]: Without dead ends: 112 [2020-10-27 20:35:35,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1370 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=417, Invalid=6893, Unknown=0, NotChecked=0, Total=7310 [2020-10-27 20:35:35,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-27 20:35:35,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 98. [2020-10-27 20:35:35,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-27 20:35:35,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2020-10-27 20:35:35,742 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 86 [2020-10-27 20:35:35,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:35,742 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2020-10-27 20:35:35,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 20:35:35,743 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2020-10-27 20:35:35,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 20:35:35,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:35,744 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:35,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-27 20:35:35,744 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:35,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:35,744 INFO L82 PathProgramCache]: Analyzing trace with hash 212206780, now seen corresponding path program 25 times [2020-10-27 20:35:35,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:35,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710708733] [2020-10-27 20:35:35,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:35,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:35,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:36,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:36,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 20:35:36,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:36,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 442 [2020-10-27 20:35:36,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:36,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 20:35:36,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:35:36,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 20:35:36,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:36,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:36,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:36,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:36,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:36,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:36,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:36,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:35:36,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:36,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:36,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:36,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:36,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:36,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:35:36,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:36,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:36,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:36,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 20:35:36,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:36,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-27 20:35:36,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:36,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 20:35:36,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:36,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 20:35:36,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:36,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-27 20:35:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:36,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:37,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:37,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 20:35:37,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:37,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-27 20:35:37,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:37,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 20:35:37,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:35:37,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 20:35:37,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:38,341 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:38,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710708733] [2020-10-27 20:35:38,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:35:38,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 20:35:38,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159538746] [2020-10-27 20:35:38,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 20:35:38,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:38,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 20:35:38,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1318, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 20:35:38,343 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand 38 states. [2020-10-27 20:35:44,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:44,330 INFO L93 Difference]: Finished difference Result 121 states and 128 transitions. [2020-10-27 20:35:44,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 20:35:44,331 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 86 [2020-10-27 20:35:44,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:44,333 INFO L225 Difference]: With dead ends: 121 [2020-10-27 20:35:44,333 INFO L226 Difference]: Without dead ends: 109 [2020-10-27 20:35:44,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=303, Invalid=5099, Unknown=0, NotChecked=0, Total=5402 [2020-10-27 20:35:44,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-27 20:35:44,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 101. [2020-10-27 20:35:44,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 20:35:44,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 106 transitions. [2020-10-27 20:35:44,358 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 106 transitions. Word has length 86 [2020-10-27 20:35:44,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:44,359 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 106 transitions. [2020-10-27 20:35:44,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 20:35:44,359 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 106 transitions. [2020-10-27 20:35:44,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-27 20:35:44,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:44,360 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:44,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-27 20:35:44,360 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:44,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:44,360 INFO L82 PathProgramCache]: Analyzing trace with hash 331153662, now seen corresponding path program 26 times [2020-10-27 20:35:44,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:44,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550681387] [2020-10-27 20:35:44,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:44,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:44,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:44,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:45,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:45,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 20:35:45,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:35:45,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1070 [2020-10-27 20:35:45,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:45,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 20:35:45,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:35:45,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 20:35:45,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:45,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:45,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:45,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:45,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:45,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:45,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:45,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:35:45,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:45,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:45,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:45,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:45,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:45,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:35:45,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:45,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:45,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:45,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 20:35:45,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:45,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-27 20:35:45,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:45,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 20:35:45,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:45,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 20:35:45,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:46,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 20:35:46,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:46,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:46,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:46,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 20:35:46,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:46,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-27 20:35:46,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:46,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 20:35:46,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:35:46,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 20:35:46,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:47,077 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:47,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550681387] [2020-10-27 20:35:47,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:35:47,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 20:35:47,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470615702] [2020-10-27 20:35:47,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 20:35:47,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:47,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 20:35:47,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1151, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 20:35:47,079 INFO L87 Difference]: Start difference. First operand 101 states and 106 transitions. Second operand 39 states.