/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:34:46,785 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:34:46,788 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:34:46,828 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:34:46,828 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:34:46,830 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:34:46,832 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:34:46,834 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:34:46,836 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:34:46,837 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:34:46,851 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:34:46,855 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:34:46,855 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:34:46,857 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:34:46,858 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:34:46,859 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:34:46,860 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:34:46,862 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:34:46,864 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:34:46,866 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:34:46,868 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:34:46,869 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:34:46,871 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:34:46,872 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:34:46,875 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:34:46,876 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:34:46,876 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:34:46,877 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:34:46,878 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:34:46,879 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:34:46,879 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:34:46,880 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:34:46,881 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:34:46,882 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:34:46,883 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:34:46,883 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:34:46,884 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:34:46,885 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:34:46,885 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:34:46,886 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:34:46,887 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:34:46,889 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 01:34:46,924 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:34:46,924 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:34:46,925 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:34:46,926 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:34:46,926 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:34:46,927 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:34:46,927 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:34:46,927 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:34:46,927 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:34:46,928 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:34:46,928 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:34:46,928 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:34:46,929 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:34:46,929 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:34:46,929 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:34:46,929 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:34:46,929 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:34:46,930 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:34:46,930 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:34:46,930 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:34:46,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:34:46,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:34:46,932 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:34:46,932 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:34:46,933 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:34:46,933 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:34:46,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:34:46,933 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:34:46,933 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:34:46,933 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:34:47,318 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:34:47,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:34:47,365 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:34:47,367 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:34:47,367 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:34:47,369 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i [2020-10-27 01:34:47,452 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/762361716/94e6ac607b4e479e8957ee5084bcdf5d/FLAG4b9232fd9 [2020-10-27 01:34:48,016 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:34:48,017 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i [2020-10-27 01:34:48,026 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/762361716/94e6ac607b4e479e8957ee5084bcdf5d/FLAG4b9232fd9 [2020-10-27 01:34:48,377 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/762361716/94e6ac607b4e479e8957ee5084bcdf5d [2020-10-27 01:34:48,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:34:48,388 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:34:48,394 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:34:48,394 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:34:48,398 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:34:48,399 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:34:48" (1/1) ... [2020-10-27 01:34:48,403 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a6cd436 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:48, skipping insertion in model container [2020-10-27 01:34:48,403 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:34:48" (1/1) ... [2020-10-27 01:34:48,412 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:34:48,438 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:34:48,692 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:34:48,705 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:34:48,735 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:34:48,755 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:34:48,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:48 WrapperNode [2020-10-27 01:34:48,757 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:34:48,758 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:34:48,758 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:34:48,758 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:34:48,798 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:48" (1/1) ... [2020-10-27 01:34:48,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:48" (1/1) ... [2020-10-27 01:34:48,820 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:48" (1/1) ... [2020-10-27 01:34:48,821 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:48" (1/1) ... [2020-10-27 01:34:48,856 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:48" (1/1) ... [2020-10-27 01:34:48,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:48" (1/1) ... [2020-10-27 01:34:48,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:48" (1/1) ... [2020-10-27 01:34:48,871 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:34:48,872 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:34:48,872 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:34:48,872 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:34:48,873 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:48" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:34:48,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:34:48,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:34:48,952 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:34:48,952 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:34:48,952 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:34:48,952 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:34:48,952 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:34:48,953 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:34:48,953 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:34:48,953 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:34:48,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:34:48,953 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:34:48,953 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:34:48,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:34:48,954 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:34:48,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:34:48,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:34:48,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:34:48,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:34:51,380 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:34:51,381 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 01:34:51,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:34:51 BoogieIcfgContainer [2020-10-27 01:34:51,386 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:34:51,390 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:34:51,390 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:34:51,397 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:34:51,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:34:48" (1/3) ... [2020-10-27 01:34:51,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c335b0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:34:51, skipping insertion in model container [2020-10-27 01:34:51,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:48" (2/3) ... [2020-10-27 01:34:51,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c335b0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:34:51, skipping insertion in model container [2020-10-27 01:34:51,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:34:51" (3/3) ... [2020-10-27 01:34:51,401 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_1-1.i [2020-10-27 01:34:51,413 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:34:51,418 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:34:51,430 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:34:51,465 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:34:51,465 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:34:51,465 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:34:51,466 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:34:51,466 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:34:51,466 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:34:51,466 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:34:51,466 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:34:51,483 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-27 01:34:51,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:34:51,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:51,489 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:51,490 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:51,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:51,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1462675887, now seen corresponding path program 1 times [2020-10-27 01:34:51,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:51,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861735164] [2020-10-27 01:34:51,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:51,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:51,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:51,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:51,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:34:51,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:51,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-27 01:34:51,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:51,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:51,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:34:51,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:51,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:34:51,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:51,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:51,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:51,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:51,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:51,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:51,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-27 01:34:51,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:51,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:51,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:51,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:51,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:52,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861735164] [2020-10-27 01:34:52,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:34:52,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 01:34:52,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094611691] [2020-10-27 01:34:52,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 01:34:52,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:52,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 01:34:52,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:34:52,036 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-10-27 01:34:54,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:54,238 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2020-10-27 01:34:54,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 01:34:54,240 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-27 01:34:54,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:54,248 INFO L225 Difference]: With dead ends: 53 [2020-10-27 01:34:54,248 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 01:34:54,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:34:54,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 01:34:54,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-27 01:34:54,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 01:34:54,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-10-27 01:34:54,293 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 16 [2020-10-27 01:34:54,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:54,293 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-10-27 01:34:54,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 01:34:54,293 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-10-27 01:34:54,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:34:54,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:54,295 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:54,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:34:54,296 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:54,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:54,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1653210379, now seen corresponding path program 1 times [2020-10-27 01:34:54,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:54,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005651258] [2020-10-27 01:34:54,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:54,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:54,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:54,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:54,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:34:54,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:54,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-27 01:34:54,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:54,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:34:54,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:54,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:34:54,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 14 [2020-10-27 01:34:54,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:54,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:54,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:54,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:54,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:54,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:54,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:34:54,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:54,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:54,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:54,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:54,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:54,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:54,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005651258] [2020-10-27 01:34:54,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:34:54,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:34:54,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17151321] [2020-10-27 01:34:54,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:34:54,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:54,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:34:54,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:34:54,580 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 4 states. [2020-10-27 01:34:54,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:54,686 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2020-10-27 01:34:54,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:34:54,686 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-27 01:34:54,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:54,688 INFO L225 Difference]: With dead ends: 47 [2020-10-27 01:34:54,688 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 01:34:54,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:34:54,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 01:34:54,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-10-27 01:34:54,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 01:34:54,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-27 01:34:54,700 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 16 [2020-10-27 01:34:54,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:54,700 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-27 01:34:54,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:34:54,701 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-27 01:34:54,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:34:54,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:54,702 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:54,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:34:54,702 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:54,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:54,703 INFO L82 PathProgramCache]: Analyzing trace with hash -337626729, now seen corresponding path program 1 times [2020-10-27 01:34:54,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:54,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942140470] [2020-10-27 01:34:54,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:54,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:54,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:54,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:55,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:55,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:34:55,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:34:55,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 722 [2020-10-27 01:34:55,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:55,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:34:55,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:55,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:34:55,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:34:55,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:55,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:55,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:55,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:55,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:55,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:34:55,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:55,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:55,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:55,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:55,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:55,567 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 01:34:55,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942140470] [2020-10-27 01:34:55,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:55,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:34:55,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677516606] [2020-10-27 01:34:55,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:34:55,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:55,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:34:55,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:34:55,570 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2020-10-27 01:34:55,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:55,701 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2020-10-27 01:34:55,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:34:55,704 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-27 01:34:55,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:55,706 INFO L225 Difference]: With dead ends: 56 [2020-10-27 01:34:55,706 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 01:34:55,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:34:55,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 01:34:55,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2020-10-27 01:34:55,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 01:34:55,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-27 01:34:55,715 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 18 [2020-10-27 01:34:55,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:55,715 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-27 01:34:55,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:34:55,716 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-27 01:34:55,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:34:55,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:55,716 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:55,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:34:55,717 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:55,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:55,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1217875897, now seen corresponding path program 2 times [2020-10-27 01:34:55,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:55,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517987947] [2020-10-27 01:34:55,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:55,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:55,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:55,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:56,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:56,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:34:56,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:34:56,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 755 [2020-10-27 01:34:56,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:56,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:34:56,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:56,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:34:56,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:56,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:56,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:56,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:56,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:56,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:56,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:56,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:34:56,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:56,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:56,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:56,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:56,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 01:34:56,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:56,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517987947] [2020-10-27 01:34:56,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:56,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:34:56,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917964220] [2020-10-27 01:34:56,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:34:56,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:56,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:34:56,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:34:56,602 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 6 states. [2020-10-27 01:34:58,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:58,838 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2020-10-27 01:34:58,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:34:58,840 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-27 01:34:58,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:58,841 INFO L225 Difference]: With dead ends: 63 [2020-10-27 01:34:58,841 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 01:34:58,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:34:58,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 01:34:58,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2020-10-27 01:34:58,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 01:34:58,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-27 01:34:58,861 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 20 [2020-10-27 01:34:58,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:58,862 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-27 01:34:58,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:34:58,862 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-27 01:34:58,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:34:58,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:58,863 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:58,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:34:58,864 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:58,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:58,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1407280475, now seen corresponding path program 3 times [2020-10-27 01:34:58,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:58,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653647030] [2020-10-27 01:34:58,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:58,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:58,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:58,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:59,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:59,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:34:59,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:34:59,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1095 [2020-10-27 01:34:59,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:59,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:34:59,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:59,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:34:59,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:00,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:00,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:00,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:00,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:00,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:00,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:00,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:35:00,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:00,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:00,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:00,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:00,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:00,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:35:00,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653647030] [2020-10-27 01:35:00,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:00,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:35:00,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765077582] [2020-10-27 01:35:00,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:35:00,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:00,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:35:00,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:35:00,087 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 7 states. [2020-10-27 01:35:00,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:00,293 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2020-10-27 01:35:00,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:35:00,294 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-27 01:35:00,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:00,295 INFO L225 Difference]: With dead ends: 77 [2020-10-27 01:35:00,295 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 01:35:00,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:35:00,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 01:35:00,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-10-27 01:35:00,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 01:35:00,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-10-27 01:35:00,306 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 22 [2020-10-27 01:35:00,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:00,306 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-10-27 01:35:00,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:35:00,306 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-10-27 01:35:00,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:35:00,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:00,307 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:00,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:35:00,307 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:00,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:00,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1258513795, now seen corresponding path program 4 times [2020-10-27 01:35:00,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:00,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734629112] [2020-10-27 01:35:00,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:00,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:00,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:00,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:02,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:02,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:35:02,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:35:02,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1957 [2020-10-27 01:35:02,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:02,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:35:02,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:02,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:35:02,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:02,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:02,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:02,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:02,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:02,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:02,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:02,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:35:02,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:02,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:02,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:02,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:02,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:02,769 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-27 01:35:02,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734629112] [2020-10-27 01:35:02,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:02,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:35:02,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10288827] [2020-10-27 01:35:02,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:35:02,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:02,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:35:02,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:35:02,776 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 9 states. [2020-10-27 01:35:05,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:05,330 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-10-27 01:35:05,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:35:05,331 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-27 01:35:05,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:05,332 INFO L225 Difference]: With dead ends: 51 [2020-10-27 01:35:05,332 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 01:35:05,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:35:05,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 01:35:05,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-27 01:35:05,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 01:35:05,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-10-27 01:35:05,341 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 24 [2020-10-27 01:35:05,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:05,341 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-10-27 01:35:05,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:35:05,342 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-10-27 01:35:05,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:35:05,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:05,343 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:05,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:35:05,343 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:05,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:05,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1148266532, now seen corresponding path program 1 times [2020-10-27 01:35:05,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:05,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275003187] [2020-10-27 01:35:05,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:05,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:05,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:05,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:07,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:07,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:35:07,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:35:07,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2522 [2020-10-27 01:35:07,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:07,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:35:07,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:07,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:35:07,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:07,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:07,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:07,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:07,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:07,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:07,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:07,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:35:07,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:07,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:07,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:07,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:07,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:07,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-27 01:35:08,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:08,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:08,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:08,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:35:08,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:08,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:35:08,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:08,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:08,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 01:35:08,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:08,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:08,009 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:35:08,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275003187] [2020-10-27 01:35:08,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:08,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:35:08,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316214184] [2020-10-27 01:35:08,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:35:08,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:08,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:35:08,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:35:08,012 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 8 states. [2020-10-27 01:35:10,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:10,364 INFO L93 Difference]: Finished difference Result 97 states and 111 transitions. [2020-10-27 01:35:10,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:35:10,365 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-27 01:35:10,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:10,366 INFO L225 Difference]: With dead ends: 97 [2020-10-27 01:35:10,366 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 01:35:10,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:35:10,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 01:35:10,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 54. [2020-10-27 01:35:10,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 01:35:10,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-10-27 01:35:10,388 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 33 [2020-10-27 01:35:10,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:10,388 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-10-27 01:35:10,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:35:10,388 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-10-27 01:35:10,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:35:10,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:10,389 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:10,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:35:10,390 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:10,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:10,390 INFO L82 PathProgramCache]: Analyzing trace with hash -2125805118, now seen corresponding path program 2 times [2020-10-27 01:35:10,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:10,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304065212] [2020-10-27 01:35:10,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:10,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:10,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:10,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:13,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:13,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:35:13,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:35:13,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3358 [2020-10-27 01:35:13,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:13,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:35:13,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:13,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:35:13,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:13,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:13,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:13,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:13,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:13,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:13,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:13,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:35:13,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:13,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:13,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:13,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:13,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:13,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-27 01:35:13,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:13,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:13,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:13,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:35:13,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:13,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:35:13,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:13,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:13,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 01:35:13,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:13,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:13,938 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:35:13,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304065212] [2020-10-27 01:35:13,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:13,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:35:13,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540930787] [2020-10-27 01:35:13,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:35:13,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:13,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:35:13,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:35:13,941 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 9 states. [2020-10-27 01:35:16,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:16,367 INFO L93 Difference]: Finished difference Result 109 states and 125 transitions. [2020-10-27 01:35:16,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:35:16,369 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-10-27 01:35:16,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:16,371 INFO L225 Difference]: With dead ends: 109 [2020-10-27 01:35:16,371 INFO L226 Difference]: Without dead ends: 72 [2020-10-27 01:35:16,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:35:16,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-27 01:35:16,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 61. [2020-10-27 01:35:16,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 01:35:16,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2020-10-27 01:35:16,398 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 35 [2020-10-27 01:35:16,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:16,398 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2020-10-27 01:35:16,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:35:16,398 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2020-10-27 01:35:16,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:35:16,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:16,399 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:16,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:35:16,400 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:16,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:16,400 INFO L82 PathProgramCache]: Analyzing trace with hash -297632800, now seen corresponding path program 3 times [2020-10-27 01:35:16,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:16,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870314298] [2020-10-27 01:35:16,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:16,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:16,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:16,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:21,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:21,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:35:21,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:35:21,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 01:35:21,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:21,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:35:21,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:21,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:35:21,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:21,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:21,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:21,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:21,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:21,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:21,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:21,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:35:21,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:21,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:21,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:21,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:21,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:21,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-27 01:35:21,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:21,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:21,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:21,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:35:21,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:21,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:35:21,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:21,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:21,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 01:35:21,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:21,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:21,609 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:35:21,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870314298] [2020-10-27 01:35:21,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:21,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:35:21,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565742382] [2020-10-27 01:35:21,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:35:21,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:21,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:35:21,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:35:21,617 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand 10 states. [2020-10-27 01:35:24,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:24,112 INFO L93 Difference]: Finished difference Result 121 states and 139 transitions. [2020-10-27 01:35:24,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:35:24,113 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-10-27 01:35:24,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:24,114 INFO L225 Difference]: With dead ends: 121 [2020-10-27 01:35:24,114 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 01:35:24,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:35:24,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 01:35:24,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-10-27 01:35:24,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 01:35:24,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2020-10-27 01:35:24,126 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 37 [2020-10-27 01:35:24,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:24,126 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2020-10-27 01:35:24,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:35:24,130 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2020-10-27 01:35:24,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:35:24,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:24,131 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:24,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:35:24,132 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:24,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:24,132 INFO L82 PathProgramCache]: Analyzing trace with hash -65659266, now seen corresponding path program 4 times [2020-10-27 01:35:24,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:24,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96900783] [2020-10-27 01:35:24,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:24,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:24,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:24,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:29,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:29,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 01:35:29,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:35:29,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 01:35:29,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:29,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:35:29,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:29,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 01:35:29,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:29,567 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 36 [2020-10-27 01:35:29,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:29,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:29,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:29,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:29,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:29,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:29,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:35:29,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:29,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:29,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:29,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:29,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:29,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-27 01:35:29,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:29,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:29,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:29,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:35:29,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:29,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:35:29,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:29,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:35:29,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:29,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:35:29,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:29,700 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-27 01:35:29,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96900783] [2020-10-27 01:35:29,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:29,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:35:29,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552794971] [2020-10-27 01:35:29,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:35:29,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:29,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:35:29,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:35:29,704 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand 11 states. [2020-10-27 01:35:32,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:32,239 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2020-10-27 01:35:32,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:35:32,241 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-10-27 01:35:32,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:32,242 INFO L225 Difference]: With dead ends: 76 [2020-10-27 01:35:32,242 INFO L226 Difference]: Without dead ends: 72 [2020-10-27 01:35:32,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:35:32,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-27 01:35:32,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-27 01:35:32,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 01:35:32,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2020-10-27 01:35:32,262 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 39 [2020-10-27 01:35:32,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:32,263 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2020-10-27 01:35:32,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:35:32,264 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2020-10-27 01:35:32,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:35:32,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:32,265 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:32,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:35:32,266 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:32,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:32,268 INFO L82 PathProgramCache]: Analyzing trace with hash -536731393, now seen corresponding path program 1 times [2020-10-27 01:35:32,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:32,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665826514] [2020-10-27 01:35:32,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:32,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:32,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:32,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:37,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:37,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 01:35:37,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:35:37,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 01:35:37,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:37,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:35:37,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:37,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:35:37,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:35:37,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:37,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:37,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:37,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:37,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:37,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:37,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:35:37,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:37,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:37,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:37,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:37,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:37,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-27 01:35:37,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:37,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:37,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:37,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:35:37,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:37,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:35:37,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:37,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:37,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 01:35:37,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:37,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:37,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-27 01:35:37,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:37,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:37,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:37,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:35:37,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:37,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:35:37,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:37,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:37,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 01:35:37,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:37,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:37,518 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-27 01:35:37,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665826514] [2020-10-27 01:35:37,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:37,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:35:37,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935643502] [2020-10-27 01:35:37,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:35:37,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:37,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:35:37,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:35:37,521 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand 11 states. [2020-10-27 01:35:40,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:40,146 INFO L93 Difference]: Finished difference Result 141 states and 159 transitions. [2020-10-27 01:35:40,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:35:40,146 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-10-27 01:35:40,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:40,148 INFO L225 Difference]: With dead ends: 141 [2020-10-27 01:35:40,148 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 01:35:40,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:35:40,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 01:35:40,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-10-27 01:35:40,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 01:35:40,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2020-10-27 01:35:40,167 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 48 [2020-10-27 01:35:40,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:40,167 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2020-10-27 01:35:40,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:35:40,167 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2020-10-27 01:35:40,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 01:35:40,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:40,172 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:40,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:35:40,172 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:40,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:40,173 INFO L82 PathProgramCache]: Analyzing trace with hash 714690465, now seen corresponding path program 2 times [2020-10-27 01:35:40,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:40,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562919334] [2020-10-27 01:35:40,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:40,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:40,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:40,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:45,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:45,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 01:35:45,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:35:45,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 01:35:45,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:45,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:35:45,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:45,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 01:35:45,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:45,625 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 32 [2020-10-27 01:35:45,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:45,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:45,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:45,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:45,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:45,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:45,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:35:45,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:45,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:45,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:45,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:45,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:45,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 01:35:45,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:45,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:45,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:45,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:35:45,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:45,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:35:45,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:45,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:35:45,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:45,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:35:45,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:45,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-27 01:35:45,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:45,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:45,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:45,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:35:45,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:45,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:35:45,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:45,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:35:45,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:45,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:35:45,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:45,794 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 4 proven. 42 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-27 01:35:45,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562919334] [2020-10-27 01:35:45,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:45,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:35:45,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505755659] [2020-10-27 01:35:45,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:35:45,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:45,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:35:45,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:35:45,797 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand 13 states. [2020-10-27 01:35:46,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:46,428 INFO L93 Difference]: Finished difference Result 87 states and 93 transitions. [2020-10-27 01:35:46,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:35:46,429 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2020-10-27 01:35:46,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:46,430 INFO L225 Difference]: With dead ends: 87 [2020-10-27 01:35:46,430 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 01:35:46,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:35:46,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 01:35:46,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-27 01:35:46,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 01:35:46,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2020-10-27 01:35:46,443 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 50 [2020-10-27 01:35:46,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:46,443 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2020-10-27 01:35:46,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:35:46,444 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2020-10-27 01:35:46,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 01:35:46,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:46,445 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:46,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:35:46,445 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:46,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:46,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1515979904, now seen corresponding path program 3 times [2020-10-27 01:35:46,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:46,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522347078] [2020-10-27 01:35:46,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:46,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:46,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:46,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:51,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:51,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 01:35:51,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:35:51,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 01:35:51,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:51,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:35:51,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:51,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:35:51,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:51,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:35:51,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:51,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:51,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:51,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:35:51,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:51,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:35:51,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:51,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:51,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:35:51,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:51,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:51,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 01:35:51,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:51,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:51,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:51,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:35:51,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:51,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:35:51,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:51,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:51,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 01:35:51,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:51,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:51,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-27 01:35:51,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:51,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:51,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:51,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:35:51,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:51,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:35:51,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:51,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:51,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 01:35:51,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:51,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:51,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-27 01:35:51,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:51,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:51,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:51,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:35:51,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:35:51,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:35:51,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:51,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:35:51,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 01:35:51,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:35:51,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:35:51,710 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 6 proven. 64 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-27 01:35:51,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522347078] [2020-10-27 01:35:51,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:35:51,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:35:51,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942974248] [2020-10-27 01:35:51,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:35:51,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:35:51,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:35:51,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:35:51,712 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand 12 states. [2020-10-27 01:35:54,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:35:54,301 INFO L93 Difference]: Finished difference Result 161 states and 179 transitions. [2020-10-27 01:35:54,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:35:54,302 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 59 [2020-10-27 01:35:54,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:35:54,304 INFO L225 Difference]: With dead ends: 161 [2020-10-27 01:35:54,304 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 01:35:54,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:35:54,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 01:35:54,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 90. [2020-10-27 01:35:54,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-27 01:35:54,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2020-10-27 01:35:54,332 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 59 [2020-10-27 01:35:54,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:35:54,332 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2020-10-27 01:35:54,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:35:54,332 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2020-10-27 01:35:54,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 01:35:54,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:35:54,333 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:35:54,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:35:54,334 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:35:54,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:35:54,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1892594590, now seen corresponding path program 4 times [2020-10-27 01:35:54,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:35:54,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934229211] [2020-10-27 01:35:54,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:35:54,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:35:54,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:54,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:35:59,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:35:59,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 01:35:59,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:35:59,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 01:35:59,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:35:59,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:35:59,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:35:59,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 01:35:59,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0