/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/list-simple/dll2n_remove_all_reverse.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:04:25,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:04:25,762 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:04:25,812 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:04:25,813 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:04:25,821 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:04:25,824 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:04:25,828 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:04:25,832 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:04:25,839 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:04:25,840 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:04:25,842 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:04:25,842 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:04:25,846 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:04:25,849 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:04:25,851 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:04:25,852 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:04:25,856 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:04:25,864 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:04:25,873 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:04:25,875 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:04:25,877 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:04:25,879 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:04:25,882 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:04:25,885 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:04:25,886 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:04:25,886 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:04:25,889 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:04:25,889 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:04:25,890 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:04:25,891 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:04:25,892 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:04:25,894 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:04:25,895 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:04:25,896 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:04:25,897 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:04:25,898 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:04:25,898 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:04:25,898 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:04:25,899 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:04:25,900 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:04:25,908 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 20:04:25,967 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:04:25,967 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:04:25,972 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:04:25,972 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:04:25,972 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:04:25,973 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:04:25,973 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:04:25,973 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:04:25,973 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:04:25,973 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:04:25,975 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:04:25,975 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:04:25,975 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:04:25,975 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:04:25,975 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:04:25,976 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:04:25,976 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:04:25,976 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:04:25,976 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:04:25,976 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:04:25,977 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:04:25,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:04:25,977 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:04:25,977 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:04:25,977 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:04:25,978 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:04:25,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:04:25,978 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:04:25,978 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:04:25,978 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:04:26,391 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:04:26,441 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:04:26,446 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:04:26,447 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:04:26,448 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:04:26,450 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/dll2n_remove_all_reverse.i [2020-10-27 20:04:26,559 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ef82675e9/42cd5e7a51fb4580876d02166df50558/FLAG2d2b4b87f [2020-10-27 20:04:27,500 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:04:27,504 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-simple/dll2n_remove_all_reverse.i [2020-10-27 20:04:27,533 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ef82675e9/42cd5e7a51fb4580876d02166df50558/FLAG2d2b4b87f [2020-10-27 20:04:27,742 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ef82675e9/42cd5e7a51fb4580876d02166df50558 [2020-10-27 20:04:27,745 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:04:27,752 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:04:27,756 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:04:27,756 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:04:27,761 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:04:27,762 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:04:27" (1/1) ... [2020-10-27 20:04:27,769 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a59c40f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:04:27, skipping insertion in model container [2020-10-27 20:04:27,769 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:04:27" (1/1) ... [2020-10-27 20:04:27,779 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:04:27,856 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:04:28,251 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:04:28,274 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:04:28,381 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:04:28,454 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:04:28,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:04:28 WrapperNode [2020-10-27 20:04:28,455 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:04:28,457 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:04:28,457 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:04:28,457 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:04:28,473 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:04:28" (1/1) ... [2020-10-27 20:04:28,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:04:28" (1/1) ... [2020-10-27 20:04:28,490 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:04:28" (1/1) ... [2020-10-27 20:04:28,491 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:04:28" (1/1) ... [2020-10-27 20:04:28,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:04:28" (1/1) ... [2020-10-27 20:04:28,529 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:04:28" (1/1) ... [2020-10-27 20:04:28,543 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:04:28" (1/1) ... [2020-10-27 20:04:28,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:04:28,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:04:28,556 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:04:28,556 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:04:28,557 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:04:28" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:04:28,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:04:28,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:04:28,648 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:04:28,649 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-27 20:04:28,649 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-27 20:04:28,649 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-27 20:04:28,649 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2020-10-27 20:04:28,649 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2020-10-27 20:04:28,650 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_remove_last [2020-10-27 20:04:28,650 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:04:28,650 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:04:28,650 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:04:28,650 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 20:04:28,651 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 20:04:28,651 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:04:28,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:04:28,651 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-27 20:04:28,651 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-27 20:04:28,652 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 20:04:28,652 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 20:04:28,652 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 20:04:28,652 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 20:04:28,652 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 20:04:28,653 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 20:04:28,653 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 20:04:28,653 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 20:04:28,653 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 20:04:28,653 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 20:04:28,653 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 20:04:28,654 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 20:04:28,654 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 20:04:28,654 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 20:04:28,654 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 20:04:28,654 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 20:04:28,654 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 20:04:28,655 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 20:04:28,655 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 20:04:28,655 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 20:04:28,655 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 20:04:28,655 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 20:04:28,655 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 20:04:28,656 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 20:04:28,656 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 20:04:28,656 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 20:04:28,656 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 20:04:28,656 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 20:04:28,656 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 20:04:28,657 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 20:04:28,657 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 20:04:28,657 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 20:04:28,657 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 20:04:28,657 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 20:04:28,657 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 20:04:28,658 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 20:04:28,658 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 20:04:28,658 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 20:04:28,658 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 20:04:28,658 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 20:04:28,658 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 20:04:28,659 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 20:04:28,659 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 20:04:28,659 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 20:04:28,659 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 20:04:28,659 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 20:04:28,660 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 20:04:28,660 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 20:04:28,660 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 20:04:28,660 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 20:04:28,660 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 20:04:28,660 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 20:04:28,661 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 20:04:28,661 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 20:04:28,661 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 20:04:28,661 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 20:04:28,661 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 20:04:28,661 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 20:04:28,662 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 20:04:28,662 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 20:04:28,662 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 20:04:28,662 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 20:04:28,662 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 20:04:28,663 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 20:04:28,663 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 20:04:28,663 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 20:04:28,663 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 20:04:28,663 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 20:04:28,663 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 20:04:28,664 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 20:04:28,664 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 20:04:28,664 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 20:04:28,664 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 20:04:28,664 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 20:04:28,664 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 20:04:28,665 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 20:04:28,665 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 20:04:28,665 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 20:04:28,665 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 20:04:28,665 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 20:04:28,665 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 20:04:28,666 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 20:04:28,666 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 20:04:28,666 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 20:04:28,666 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 20:04:28,666 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 20:04:28,666 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 20:04:28,667 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 20:04:28,667 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 20:04:28,667 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 20:04:28,667 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 20:04:28,667 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 20:04:28,667 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 20:04:28,667 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 20:04:28,668 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 20:04:28,668 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 20:04:28,668 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 20:04:28,668 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 20:04:28,668 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 20:04:28,668 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 20:04:28,669 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 20:04:28,669 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 20:04:28,669 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-27 20:04:28,669 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2020-10-27 20:04:28,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 20:04:28,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 20:04:28,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:04:28,670 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2020-10-27 20:04:28,670 INFO L130 BoogieDeclarations]: Found specification of procedure dll_remove_last [2020-10-27 20:04:28,670 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 20:04:28,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:04:28,670 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:04:28,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-10-27 20:04:28,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:04:28,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:04:28,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:04:28,671 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:04:29,077 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-27 20:04:29,373 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:04:29,374 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-27 20:04:29,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:04:29 BoogieIcfgContainer [2020-10-27 20:04:29,376 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:04:29,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:04:29,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:04:29,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:04:29,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:04:27" (1/3) ... [2020-10-27 20:04:29,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d0bce57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:04:29, skipping insertion in model container [2020-10-27 20:04:29,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:04:28" (2/3) ... [2020-10-27 20:04:29,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d0bce57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:04:29, skipping insertion in model container [2020-10-27 20:04:29,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:04:29" (3/3) ... [2020-10-27 20:04:29,388 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_remove_all_reverse.i [2020-10-27 20:04:29,403 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:04:29,410 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:04:29,427 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:04:29,461 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:04:29,461 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:04:29,461 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:04:29,461 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:04:29,461 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:04:29,462 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:04:29,462 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:04:29,462 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:04:29,483 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-10-27 20:04:29,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 20:04:29,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:04:29,492 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:04:29,493 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:04:29,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:04:29,501 INFO L82 PathProgramCache]: Analyzing trace with hash -721901899, now seen corresponding path program 1 times [2020-10-27 20:04:29,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:04:29,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713227018] [2020-10-27 20:04:29,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:04:29,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:29,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:29,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:29,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:30,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:30,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 20:04:30,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:04:30,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 982 [2020-10-27 20:04:30,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:30,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:30,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 20:04:30,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:30,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:04:30,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:04:30,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:30,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:30,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:30,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:04:30,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:30,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 20:04:30,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:30,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:30,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:30,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:30,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:30,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:04:30,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:30,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:30,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:30,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:04:30,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:30,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:04:30,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:30,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:30,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:30,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:30,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:30,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:04:30,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713227018] [2020-10-27 20:04:30,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:04:30,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:04:30,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746162794] [2020-10-27 20:04:30,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:04:30,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:04:30,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:04:30,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:04:30,899 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 4 states. [2020-10-27 20:04:31,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:04:31,080 INFO L93 Difference]: Finished difference Result 71 states and 91 transitions. [2020-10-27 20:04:31,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 20:04:31,082 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-27 20:04:31,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:04:31,092 INFO L225 Difference]: With dead ends: 71 [2020-10-27 20:04:31,092 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 20:04:31,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:04:31,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 20:04:31,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-10-27 20:04:31,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 20:04:31,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-27 20:04:31,142 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 19 [2020-10-27 20:04:31,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:04:31,143 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-27 20:04:31,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:04:31,143 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-27 20:04:31,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 20:04:31,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:04:31,144 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:04:31,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:04:31,145 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:04:31,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:04:31,146 INFO L82 PathProgramCache]: Analyzing trace with hash -922305956, now seen corresponding path program 1 times [2020-10-27 20:04:31,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:04:31,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955905435] [2020-10-27 20:04:31,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:04:31,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:31,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:31,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:31,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:31,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:31,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 20:04:31,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:04:31,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 579 [2020-10-27 20:04:31,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:31,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:04:31,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:04:31,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:04:31,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:31,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:04:31,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:31,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:31,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:31,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:04:31,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:31,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 20:04:31,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:31,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:31,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:31,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:31,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:31,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:04:31,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:31,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:31,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:31,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:04:31,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:31,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 20:04:31,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:31,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:04:31,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:31,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:04:31,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:31,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:04:31,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955905435] [2020-10-27 20:04:31,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:04:31,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 20:04:31,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198024015] [2020-10-27 20:04:31,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:04:31,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:04:31,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:04:31,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:04:31,955 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 9 states. [2020-10-27 20:04:32,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:04:32,508 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2020-10-27 20:04:32,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:04:32,509 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-10-27 20:04:32,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:04:32,511 INFO L225 Difference]: With dead ends: 71 [2020-10-27 20:04:32,511 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 20:04:32,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:04:32,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 20:04:32,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-10-27 20:04:32,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 20:04:32,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-10-27 20:04:32,549 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 19 [2020-10-27 20:04:32,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:04:32,550 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-10-27 20:04:32,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:04:32,550 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-10-27 20:04:32,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 20:04:32,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:04:32,552 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:04:32,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:04:32,552 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:04:32,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:04:32,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1782215627, now seen corresponding path program 1 times [2020-10-27 20:04:32,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:04:32,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307668035] [2020-10-27 20:04:32,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:04:32,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:32,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:32,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:32,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:33,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:33,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:04:33,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:04:33,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 408 [2020-10-27 20:04:33,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:33,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:04:33,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:04:33,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:04:33,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:33,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:04:33,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:33,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:33,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:33,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:04:33,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:33,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:04:33,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:33,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:33,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:33,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:33,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:33,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:04:33,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:33,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:33,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:33,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-27 20:04:33,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:33,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 20:04:33,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:33,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:04:33,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:33,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:04:33,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:33,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:04:33,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307668035] [2020-10-27 20:04:33,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:04:33,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:04:33,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069504255] [2020-10-27 20:04:33,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:04:33,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:04:33,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:04:33,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:04:33,154 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 8 states. [2020-10-27 20:04:33,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:04:33,434 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-10-27 20:04:33,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:04:33,435 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-27 20:04:33,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:04:33,436 INFO L225 Difference]: With dead ends: 60 [2020-10-27 20:04:33,436 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 20:04:33,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:04:33,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 20:04:33,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-27 20:04:33,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 20:04:33,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-27 20:04:33,447 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 24 [2020-10-27 20:04:33,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:04:33,448 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-27 20:04:33,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:04:33,448 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-27 20:04:33,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 20:04:33,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:04:33,450 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:04:33,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:04:33,451 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:04:33,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:04:33,454 INFO L82 PathProgramCache]: Analyzing trace with hash 580429863, now seen corresponding path program 1 times [2020-10-27 20:04:33,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:04:33,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094484846] [2020-10-27 20:04:33,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:04:33,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:33,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:33,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:33,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:35,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:35,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 20:04:35,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:04:35,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2232 [2020-10-27 20:04:35,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:35,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:04:35,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 20:04:35,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:04:35,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:35,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:04:35,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:35,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:35,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:35,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:04:35,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:35,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:04:35,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:35,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:35,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:35,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:35,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:35,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:04:35,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:35,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:35,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:35,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-27 20:04:35,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:35,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 20:04:35,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:35,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:35,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:35,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:35,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:35,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-27 20:04:35,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:35,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:35,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:35,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:04:35,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:35,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 20:04:35,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:35,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:04:35,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:35,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:04:35,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 20:04:35,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094484846] [2020-10-27 20:04:35,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:04:35,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 20:04:35,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217116855] [2020-10-27 20:04:35,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:04:35,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:04:35,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:04:35,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:04:35,950 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 9 states. [2020-10-27 20:04:36,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:04:36,356 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-10-27 20:04:36,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:04:36,357 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-27 20:04:36,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:04:36,358 INFO L225 Difference]: With dead ends: 54 [2020-10-27 20:04:36,358 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 20:04:36,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:04:36,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 20:04:36,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-27 20:04:36,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 20:04:36,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-10-27 20:04:36,373 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 31 [2020-10-27 20:04:36,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:04:36,373 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-10-27 20:04:36,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:04:36,373 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-10-27 20:04:36,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 20:04:36,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:04:36,375 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:04:36,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:04:36,375 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:04:36,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:04:36,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1158586103, now seen corresponding path program 1 times [2020-10-27 20:04:36,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:04:36,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539159087] [2020-10-27 20:04:36,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:04:36,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:36,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:36,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:36,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:36,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:37,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:41,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:41,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 20:04:41,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:04:41,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4900 [2020-10-27 20:04:41,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:41,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:04:41,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 20:04:41,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 20:04:41,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:41,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:04:41,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:41,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:41,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:41,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:04:41,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:41,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:04:41,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:41,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:41,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:41,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:41,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:41,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:04:41,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:41,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:41,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:41,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-27 20:04:41,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:41,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 20:04:41,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:41,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:41,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:41,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:41,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 20:04:41,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-27 20:04:41,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:41,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:41,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:41,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 20:04:41,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:41,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 20:04:41,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:41,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:04:41,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:04:41,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 20:04:41,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 20:04:41,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 20:04:41,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539159087] [2020-10-27 20:04:41,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:04:41,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 20:04:41,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951834830] [2020-10-27 20:04:41,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:04:41,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:04:41,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:04:41,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:04:41,549 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 8 states. [2020-10-27 20:04:41,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:04:41,820 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-10-27 20:04:41,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:04:41,820 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-10-27 20:04:41,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:04:41,821 INFO L225 Difference]: With dead ends: 56 [2020-10-27 20:04:41,822 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 20:04:41,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:04:41,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 20:04:41,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-27 20:04:41,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 20:04:41,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-10-27 20:04:41,835 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 34 [2020-10-27 20:04:41,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:04:41,835 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-10-27 20:04:41,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:04:41,836 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-10-27 20:04:41,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 20:04:41,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:04:41,840 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:04:41,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:04:41,841 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:04:41,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:04:41,841 INFO L82 PathProgramCache]: Analyzing trace with hash -969983876, now seen corresponding path program 1 times [2020-10-27 20:04:41,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:04:41,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741332275] [2020-10-27 20:04:41,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:04:41,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:41,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:41,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:41,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:42,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:44,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:44,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 20:04:44,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:04:44,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2554 [2020-10-27 20:04:44,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:44,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:04:44,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 20:04:44,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:04:44,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:44,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:04:44,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:44,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:44,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:44,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:04:44,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:44,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:04:44,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:44,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:44,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:44,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:44,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:44,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:04:44,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:44,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:44,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:44,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:44,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-27 20:04:44,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:04:44,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-27 20:04:44,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:44,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:04:44,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:44,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:04:44,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:44,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-27 20:04:44,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:44,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:44,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:44,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 20:04:44,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:44,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-27 20:04:44,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:44,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:04:44,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:04:44,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:04:44,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:44,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:04:44,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741332275] [2020-10-27 20:04:44,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:04:44,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-27 20:04:44,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124346234] [2020-10-27 20:04:44,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:04:44,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:04:44,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:04:44,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:04:44,858 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 13 states. [2020-10-27 20:04:45,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:04:45,427 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2020-10-27 20:04:45,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:04:45,428 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-27 20:04:45,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:04:45,429 INFO L225 Difference]: With dead ends: 68 [2020-10-27 20:04:45,429 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 20:04:45,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:04:45,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 20:04:45,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-10-27 20:04:45,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 20:04:45,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-10-27 20:04:45,438 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 36 [2020-10-27 20:04:45,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:04:45,438 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-10-27 20:04:45,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:04:45,439 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-10-27 20:04:45,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 20:04:45,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:04:45,440 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:04:45,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:04:45,440 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:04:45,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:04:45,441 INFO L82 PathProgramCache]: Analyzing trace with hash -257617685, now seen corresponding path program 1 times [2020-10-27 20:04:45,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:04:45,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293802936] [2020-10-27 20:04:45,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:04:45,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:45,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:45,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:45,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:45,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 20:04:45,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:04:45,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 460 [2020-10-27 20:04:45,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:45,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:04:45,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:04:45,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 20:04:45,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:45,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:04:45,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:45,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:45,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:45,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:04:45,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:45,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:04:45,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:45,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:45,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:45,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:45,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:46,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:04:46,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:46,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:46,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:46,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 20:04:46,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:46,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-27 20:04:46,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:46,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:04:46,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:46,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:04:46,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:46,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-27 20:04:46,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:46,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:46,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:46,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 20:04:46,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:46,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 20:04:46,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:46,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:04:46,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:46,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:04:46,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:04:46,197 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:04:46,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293802936] [2020-10-27 20:04:46,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:04:46,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:04:46,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834140306] [2020-10-27 20:04:46,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:04:46,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:04:46,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:04:46,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:04:46,200 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 11 states. [2020-10-27 20:04:46,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:04:46,621 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-10-27 20:04:46,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:04:46,621 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-10-27 20:04:46,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:04:46,624 INFO L225 Difference]: With dead ends: 58 [2020-10-27 20:04:46,624 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 20:04:46,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-10-27 20:04:46,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 20:04:46,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2020-10-27 20:04:46,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 20:04:46,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-10-27 20:04:46,647 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 41 [2020-10-27 20:04:46,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:04:46,648 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-10-27 20:04:46,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:04:46,648 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-10-27 20:04:46,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 20:04:46,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:04:46,652 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:04:46,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:04:46,652 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:04:46,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:04:46,653 INFO L82 PathProgramCache]: Analyzing trace with hash 687285660, now seen corresponding path program 2 times [2020-10-27 20:04:46,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:04:46,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2140841464] [2020-10-27 20:04:46,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:04:46,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:46,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:46,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:47,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:48,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:49,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:51,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:51,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 20:04:51,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:04:51,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 20:04:51,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:51,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:04:51,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 20:04:51,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 20:04:51,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:51,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:04:51,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:51,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:51,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:51,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:04:51,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:51,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 20:04:51,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:51,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:51,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:51,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:51,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:51,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:04:51,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:51,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:51,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:51,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 20:04:51,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:51,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 20:04:51,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:51,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:51,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:51,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:51,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:51,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-27 20:04:51,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:51,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:51,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:51,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 20:04:51,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:51,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-27 20:04:51,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:51,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:04:51,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:51,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:04:51,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:52,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-27 20:04:52,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:52,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:52,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:52,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 20:04:52,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:52,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-27 20:04:52,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:52,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:04:52,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:04:52,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:04:52,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:52,409 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-27 20:04:52,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2140841464] [2020-10-27 20:04:52,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:04:52,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 20:04:52,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217472586] [2020-10-27 20:04:52,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 20:04:52,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:04:52,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 20:04:52,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:04:52,414 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 15 states. [2020-10-27 20:04:52,967 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-27 20:04:53,672 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2020-10-27 20:04:53,909 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 80 [2020-10-27 20:04:54,065 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-10-27 20:04:54,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:04:54,301 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2020-10-27 20:04:54,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 20:04:54,301 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-10-27 20:04:54,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:04:54,304 INFO L225 Difference]: With dead ends: 79 [2020-10-27 20:04:54,304 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 20:04:54,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:04:54,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 20:04:54,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-10-27 20:04:54,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 20:04:54,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2020-10-27 20:04:54,315 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 53 [2020-10-27 20:04:54,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:04:54,316 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2020-10-27 20:04:54,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 20:04:54,316 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2020-10-27 20:04:54,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 20:04:54,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:04:54,317 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:04:54,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:04:54,317 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:04:54,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:04:54,318 INFO L82 PathProgramCache]: Analyzing trace with hash 970158753, now seen corresponding path program 3 times [2020-10-27 20:04:54,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:04:54,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505261386] [2020-10-27 20:04:54,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:04:54,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:54,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:54,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:54,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:55,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:55,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:56,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:57,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:57,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:59,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:59,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 20:04:59,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 20:04:59,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 20:04:59,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:59,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 20:04:59,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 20:04:59,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 20:04:59,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:59,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:04:59,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:59,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:59,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:59,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:04:59,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:59,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:04:59,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:59,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:59,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:59,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:59,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:59,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:04:59,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:59,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:59,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:59,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:59,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 20:04:59,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:04:59,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 262 [2020-10-27 20:04:59,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:59,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:04:59,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:59,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 20:04:59,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:00,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-27 20:05:00,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:00,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:00,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:00,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 20:05:00,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:00,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-27 20:05:00,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:00,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:05:00,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:05:00,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 20:05:00,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:00,936 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2020-10-27 20:05:01,118 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2020-10-27 20:05:01,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-27 20:05:01,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:01,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:01,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:01,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 20:05:01,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:01,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 20:05:01,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:01,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:05:01,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:05:01,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:05:01,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:01,394 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 20:05:01,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505261386] [2020-10-27 20:05:01,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:05:01,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 20:05:01,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547186571] [2020-10-27 20:05:01,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 20:05:01,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:05:01,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 20:05:01,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:05:01,398 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 21 states. [2020-10-27 20:05:02,946 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2020-10-27 20:05:03,368 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 106 [2020-10-27 20:05:03,551 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 81 [2020-10-27 20:05:03,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:05:03,713 INFO L93 Difference]: Finished difference Result 100 states and 113 transitions. [2020-10-27 20:05:03,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 20:05:03,714 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 55 [2020-10-27 20:05:03,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:05:03,716 INFO L225 Difference]: With dead ends: 100 [2020-10-27 20:05:03,716 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 20:05:03,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 20:05:03,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 20:05:03,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2020-10-27 20:05:03,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-27 20:05:03,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2020-10-27 20:05:03,732 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 55 [2020-10-27 20:05:03,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:05:03,732 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2020-10-27 20:05:03,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 20:05:03,732 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2020-10-27 20:05:03,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 20:05:03,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:05:03,734 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:05:03,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:05:03,734 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:05:03,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:05:03,735 INFO L82 PathProgramCache]: Analyzing trace with hash -2066705818, now seen corresponding path program 4 times [2020-10-27 20:05:03,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:05:03,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365319230] [2020-10-27 20:05:03,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:05:03,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:03,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:04,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:04,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:04,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:05,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:06,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:06,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:08,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:08,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:08,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:08,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 20:05:08,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 20:05:08,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 20:05:08,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:08,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 20:05:08,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 20:05:08,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 20:05:08,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:08,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:05:08,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:08,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:08,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:08,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:05:08,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:08,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:05:08,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:08,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:05:08,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:05:08,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:05:08,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:08,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:05:08,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:08,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:08,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:08,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 20:05:08,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:08,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 20:05:08,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:08,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:05:08,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:05:08,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:05:08,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:09,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-27 20:05:09,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:09,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:09,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:09,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 20:05:09,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:09,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-27 20:05:09,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:09,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:05:09,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:05:09,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 20:05:09,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:10,276 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 56 [2020-10-27 20:05:12,344 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 529 DAG size of output: 48 [2020-10-27 20:05:13,807 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 452 DAG size of output: 43 [2020-10-27 20:05:15,029 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 438 DAG size of output: 37 [2020-10-27 20:05:15,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-27 20:05:15,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:15,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:15,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:15,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 20:05:15,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:15,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-27 20:05:15,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:15,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:05:15,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:05:15,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:05:15,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:15,534 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-27 20:05:15,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365319230] [2020-10-27 20:05:15,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:05:15,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 20:05:15,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119338879] [2020-10-27 20:05:15,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 20:05:15,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:05:15,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 20:05:15,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2020-10-27 20:05:15,540 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand 20 states. [2020-10-27 20:05:16,194 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 93 [2020-10-27 20:05:16,440 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 96 [2020-10-27 20:05:16,786 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 102 [2020-10-27 20:05:17,028 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 103 [2020-10-27 20:05:17,677 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-27 20:05:18,452 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 97 [2020-10-27 20:05:18,666 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 66 [2020-10-27 20:05:18,942 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 77 [2020-10-27 20:05:19,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:05:19,138 INFO L93 Difference]: Finished difference Result 100 states and 117 transitions. [2020-10-27 20:05:19,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 20:05:19,139 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 57 [2020-10-27 20:05:19,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:05:19,141 INFO L225 Difference]: With dead ends: 100 [2020-10-27 20:05:19,141 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 20:05:19,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=241, Invalid=1165, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 20:05:19,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 20:05:19,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2020-10-27 20:05:19,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-27 20:05:19,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 103 transitions. [2020-10-27 20:05:19,170 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 103 transitions. Word has length 57 [2020-10-27 20:05:19,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:05:19,173 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 103 transitions. [2020-10-27 20:05:19,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 20:05:19,173 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 103 transitions. [2020-10-27 20:05:19,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 20:05:19,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:05:19,179 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:05:19,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:05:19,184 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:05:19,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:05:19,185 INFO L82 PathProgramCache]: Analyzing trace with hash 490867755, now seen corresponding path program 5 times [2020-10-27 20:05:19,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:05:19,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162637516] [2020-10-27 20:05:19,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:05:19,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:19,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:19,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:20,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:21,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:21,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:22,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:23,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:24,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:24,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 20:05:24,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 20:05:24,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 20:05:24,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:24,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 20:05:24,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 20:05:24,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 20:05:24,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:24,734 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 34 [2020-10-27 20:05:24,970 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 36 [2020-10-27 20:05:25,116 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 27 [2020-10-27 20:05:25,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:05:25,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:25,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:25,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:25,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:05:25,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:25,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:05:25,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:25,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:05:25,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:05:25,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:05:25,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:25,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:05:25,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:25,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:25,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:25,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:25,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 20:05:25,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:05:25,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-27 20:05:25,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:25,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:05:25,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:05:25,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 20:05:25,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:25,728 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2020-10-27 20:05:26,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-27 20:05:26,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:26,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:26,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:26,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:26,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 20:05:26,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:05:26,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 428 [2020-10-27 20:05:26,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:26,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:05:26,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:05:26,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:05:26,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:27,821 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 50 [2020-10-27 20:05:29,652 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 169 DAG size of output: 140 [2020-10-27 20:05:31,364 WARN L193 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 163 DAG size of output: 132 [2020-10-27 20:05:32,759 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 151 DAG size of output: 111 [2020-10-27 20:05:34,529 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 155 DAG size of output: 125 [2020-10-27 20:05:34,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-27 20:05:34,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:34,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:34,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:34,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 20:05:34,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:34,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-27 20:05:34,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:34,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:05:34,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:05:34,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 20:05:34,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:35,127 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 20:05:35,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162637516] [2020-10-27 20:05:35,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:05:35,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 20:05:35,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796635374] [2020-10-27 20:05:35,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 20:05:35,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:05:35,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 20:05:35,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=598, Unknown=0, NotChecked=0, Total=650 [2020-10-27 20:05:35,129 INFO L87 Difference]: Start difference. First operand 86 states and 103 transitions. Second operand 26 states. [2020-10-27 20:05:36,229 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-10-27 20:05:37,761 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2020-10-27 20:05:38,093 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 92 [2020-10-27 20:05:39,412 WARN L193 SmtUtils]: Spent 1000.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 187 [2020-10-27 20:05:41,985 WARN L193 SmtUtils]: Spent 2.38 s on a formula simplification. DAG size of input: 219 DAG size of output: 212 [2020-10-27 20:05:43,105 WARN L193 SmtUtils]: Spent 953.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 170 [2020-10-27 20:05:43,968 WARN L193 SmtUtils]: Spent 510.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 20:05:44,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:05:44,286 INFO L93 Difference]: Finished difference Result 146 states and 176 transitions. [2020-10-27 20:05:44,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 20:05:44,287 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 59 [2020-10-27 20:05:44,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:05:44,290 INFO L225 Difference]: With dead ends: 146 [2020-10-27 20:05:44,290 INFO L226 Difference]: Without dead ends: 100 [2020-10-27 20:05:44,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=174, Invalid=1718, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 20:05:44,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-27 20:05:44,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2020-10-27 20:05:44,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 20:05:44,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 117 transitions. [2020-10-27 20:05:44,313 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 117 transitions. Word has length 59 [2020-10-27 20:05:44,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:05:44,313 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 117 transitions. [2020-10-27 20:05:44,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 20:05:44,313 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 117 transitions. [2020-10-27 20:05:44,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 20:05:44,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:05:44,315 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:05:44,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:05:44,316 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:05:44,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:05:44,316 INFO L82 PathProgramCache]: Analyzing trace with hash 84202731, now seen corresponding path program 6 times [2020-10-27 20:05:44,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:05:44,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729177297] [2020-10-27 20:05:44,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:05:44,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:44,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:44,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:44,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:45,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:46,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:46,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:47,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:47,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:49,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:49,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 20:05:49,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 20:05:49,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 20:05:49,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:49,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 20:05:49,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 20:05:49,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 20:05:49,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:49,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:05:49,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:49,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:49,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:49,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:05:49,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:49,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:05:49,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:49,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:05:49,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:05:49,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:05:49,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:49,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:05:49,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:49,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:49,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:49,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 20:05:49,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:49,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 20:05:49,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:49,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:05:49,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:05:49,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:05:49,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:49,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-27 20:05:49,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:49,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:49,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:49,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 20:05:49,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:49,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-27 20:05:49,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:49,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:05:49,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:05:49,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:05:49,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:50,180 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2020-10-27 20:05:50,333 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 26 [2020-10-27 20:05:50,802 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2020-10-27 20:05:51,044 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2020-10-27 20:05:51,526 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2020-10-27 20:05:54,619 WARN L193 SmtUtils]: Spent 2.88 s on a formula simplification. DAG size of input: 527 DAG size of output: 48 [2020-10-27 20:05:57,314 WARN L193 SmtUtils]: Spent 2.47 s on a formula simplification. DAG size of input: 500 DAG size of output: 43 [2020-10-27 20:06:00,573 WARN L193 SmtUtils]: Spent 2.99 s on a formula simplification. DAG size of input: 488 DAG size of output: 37 [2020-10-27 20:06:00,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-27 20:06:00,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:00,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:00,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:00,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 20:06:00,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:06:00,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-27 20:06:00,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:00,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:06:00,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:06:00,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:06:00,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:01,137 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-27 20:06:01,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729177297] [2020-10-27 20:06:01,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:06:01,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 20:06:01,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453812999] [2020-10-27 20:06:01,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 20:06:01,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:06:01,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 20:06:01,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:06:01,140 INFO L87 Difference]: Start difference. First operand 97 states and 117 transitions. Second operand 21 states. [2020-10-27 20:06:01,874 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 93 [2020-10-27 20:06:02,140 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 96 [2020-10-27 20:06:02,534 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 114 [2020-10-27 20:06:02,831 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 103 [2020-10-27 20:06:03,419 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 20:06:03,769 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-27 20:06:04,038 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 20:06:04,222 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-10-27 20:06:04,560 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-27 20:06:04,766 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 20:06:05,477 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 97 [2020-10-27 20:06:05,738 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 66 [2020-10-27 20:06:06,048 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 84 [2020-10-27 20:06:06,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:06:06,271 INFO L93 Difference]: Finished difference Result 127 states and 157 transitions. [2020-10-27 20:06:06,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 20:06:06,274 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 59 [2020-10-27 20:06:06,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:06:06,276 INFO L225 Difference]: With dead ends: 127 [2020-10-27 20:06:06,277 INFO L226 Difference]: Without dead ends: 116 [2020-10-27 20:06:06,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=292, Invalid=1430, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 20:06:06,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-27 20:06:06,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 102. [2020-10-27 20:06:06,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-27 20:06:06,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 127 transitions. [2020-10-27 20:06:06,323 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 127 transitions. Word has length 59 [2020-10-27 20:06:06,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:06:06,323 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 127 transitions. [2020-10-27 20:06:06,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 20:06:06,324 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 127 transitions. [2020-10-27 20:06:06,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 20:06:06,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:06:06,327 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:06:06,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:06:06,327 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:06:06,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:06:06,328 INFO L82 PathProgramCache]: Analyzing trace with hash -984969774, now seen corresponding path program 7 times [2020-10-27 20:06:06,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:06:06,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503552793] [2020-10-27 20:06:06,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:06:06,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:06,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:06,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:07,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:07,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 20:06:07,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:06:07,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 850 [2020-10-27 20:06:07,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:07,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:06:07,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:06:07,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 20:06:07,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:07,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:06:07,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:07,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:07,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:07,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:06:07,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:06:07,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:06:07,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:07,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:06:07,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:06:07,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:06:07,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:07,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:06:07,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:07,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:07,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:07,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 20:06:07,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:06:07,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-27 20:06:07,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:07,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:06:07,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:06:07,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 20:06:07,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:07,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-27 20:06:07,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:07,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:07,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:07,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 20:06:07,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:06:07,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 20:06:07,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:07,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:06:07,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:06:07,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:06:07,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:07,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-27 20:06:07,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:07,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:07,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:07,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 20:06:07,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:06:07,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:06:07,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:07,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:06:07,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:06:07,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:06:07,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:07,533 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-27 20:06:07,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503552793] [2020-10-27 20:06:07,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:06:07,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:06:07,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109289995] [2020-10-27 20:06:07,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:06:07,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:06:07,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:06:07,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:06:07,535 INFO L87 Difference]: Start difference. First operand 102 states and 127 transitions. Second operand 13 states. [2020-10-27 20:06:08,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:06:08,043 INFO L93 Difference]: Finished difference Result 133 states and 179 transitions. [2020-10-27 20:06:08,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:06:08,044 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2020-10-27 20:06:08,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:06:08,046 INFO L225 Difference]: With dead ends: 133 [2020-10-27 20:06:08,047 INFO L226 Difference]: Without dead ends: 125 [2020-10-27 20:06:08,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:06:08,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-27 20:06:08,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 108. [2020-10-27 20:06:08,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-27 20:06:08,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 141 transitions. [2020-10-27 20:06:08,072 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 141 transitions. Word has length 60 [2020-10-27 20:06:08,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:06:08,072 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 141 transitions. [2020-10-27 20:06:08,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:06:08,072 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 141 transitions. [2020-10-27 20:06:08,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 20:06:08,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:06:08,073 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:06:08,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:06:08,074 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:06:08,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:06:08,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1634713968, now seen corresponding path program 8 times [2020-10-27 20:06:08,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:06:08,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614629300] [2020-10-27 20:06:08,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:06:08,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:08,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:08,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:08,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:08,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:09,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:09,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:10,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:11,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:11,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:12,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:12,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:13,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:13,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 20:06:13,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 20:06:13,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-27 20:06:13,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:13,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 20:06:13,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 20:06:13,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 20:06:13,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:13,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:06:13,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:13,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:13,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:13,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:06:13,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:06:13,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:06:13,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:13,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:06:13,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:06:13,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:06:13,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:13,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:06:13,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:13,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:13,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:13,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 20:06:13,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:06:13,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 20:06:13,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:13,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:06:13,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:06:13,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:06:13,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:13,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-27 20:06:13,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:13,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:13,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:13,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 20:06:13,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:06:13,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-27 20:06:13,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:13,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:06:13,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:06:13,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:06:13,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:15,165 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-10-27 20:06:16,487 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 157 DAG size of output: 115 [2020-10-27 20:06:19,380 WARN L193 SmtUtils]: Spent 2.55 s on a formula simplification. DAG size of input: 921 DAG size of output: 54 [2020-10-27 20:06:22,117 WARN L193 SmtUtils]: Spent 2.39 s on a formula simplification. DAG size of input: 907 DAG size of output: 49 [2020-10-27 20:06:24,910 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 879 DAG size of output: 43 [2020-10-27 20:06:25,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-27 20:06:25,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:25,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:25,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:25,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 20:06:25,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:06:25,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-27 20:06:25,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:25,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:06:25,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:06:25,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 20:06:25,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:25,805 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 11 proven. 54 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-27 20:06:25,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614629300] [2020-10-27 20:06:25,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:06:25,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 20:06:25,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183346104] [2020-10-27 20:06:25,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 20:06:25,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:06:25,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 20:06:25,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:06:25,808 INFO L87 Difference]: Start difference. First operand 108 states and 141 transitions. Second operand 22 states. [2020-10-27 20:06:26,405 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-27 20:06:26,720 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 101 [2020-10-27 20:06:27,076 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 104 [2020-10-27 20:06:27,547 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 111 [2020-10-27 20:06:27,863 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 95 [2020-10-27 20:06:28,102 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-27 20:06:28,539 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 75 [2020-10-27 20:06:28,752 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 82 [2020-10-27 20:06:29,454 WARN L193 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 146 [2020-10-27 20:06:29,798 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-27 20:06:30,114 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 20:06:30,320 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-10-27 20:06:30,810 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-10-27 20:06:31,015 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2020-10-27 20:06:31,428 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 119 [2020-10-27 20:06:31,852 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 119 [2020-10-27 20:06:32,381 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 126 [2020-10-27 20:06:32,656 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 74 [2020-10-27 20:06:33,028 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 85 [2020-10-27 20:06:33,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:06:33,286 INFO L93 Difference]: Finished difference Result 178 states and 231 transitions. [2020-10-27 20:06:33,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 20:06:33,288 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 61 [2020-10-27 20:06:33,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:06:33,290 INFO L225 Difference]: With dead ends: 178 [2020-10-27 20:06:33,290 INFO L226 Difference]: Without dead ends: 127 [2020-10-27 20:06:33,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=307, Invalid=1673, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 20:06:33,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-27 20:06:33,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2020-10-27 20:06:33,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-27 20:06:33,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 164 transitions. [2020-10-27 20:06:33,318 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 164 transitions. Word has length 61 [2020-10-27 20:06:33,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:06:33,318 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 164 transitions. [2020-10-27 20:06:33,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 20:06:33,318 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 164 transitions. [2020-10-27 20:06:33,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 20:06:33,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:06:33,320 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:06:33,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:06:33,320 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:06:33,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:06:33,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1228048944, now seen corresponding path program 9 times [2020-10-27 20:06:33,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:06:33,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244297205] [2020-10-27 20:06:33,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:06:33,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:33,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:33,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:33,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:34,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:34,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:35,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:36,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:37,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:38,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:38,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 20:06:38,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 20:06:38,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 20:06:38,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:38,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 20:06:38,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 20:06:38,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 20:06:38,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:38,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:06:38,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:38,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:38,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:38,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:06:38,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:06:38,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:06:38,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:38,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:06:38,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:06:38,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:06:38,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:38,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:06:38,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:38,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:38,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:38,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 20:06:38,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:06:38,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 20:06:38,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:38,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:06:38,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:06:38,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:06:38,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:38,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-27 20:06:38,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:38,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:38,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:38,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:06:38,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:06:38,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-27 20:06:38,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:38,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:06:38,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:06:38,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 20:06:38,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:39,387 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-27 20:06:39,570 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2020-10-27 20:06:39,822 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2020-10-27 20:06:41,007 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 252 DAG size of output: 48 [2020-10-27 20:06:42,063 WARN L193 SmtUtils]: Spent 902.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 43 [2020-10-27 20:06:43,050 WARN L193 SmtUtils]: Spent 809.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 37 [2020-10-27 20:06:43,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-27 20:06:43,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:43,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:43,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:43,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 20:06:43,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:06:43,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-27 20:06:43,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:43,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:06:43,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:06:43,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:06:43,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:43,688 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-27 20:06:43,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244297205] [2020-10-27 20:06:43,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:06:43,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 20:06:43,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088883522] [2020-10-27 20:06:43,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 20:06:43,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:06:43,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 20:06:43,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:06:43,690 INFO L87 Difference]: Start difference. First operand 124 states and 164 transitions. Second operand 22 states. [2020-10-27 20:06:44,141 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-10-27 20:06:44,408 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-27 20:06:44,599 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-27 20:06:45,007 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 103 [2020-10-27 20:06:45,372 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 105 [2020-10-27 20:06:46,011 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2020-10-27 20:06:46,278 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-27 20:06:46,603 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-27 20:06:46,825 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-10-27 20:06:47,397 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-27 20:06:47,743 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 102 [2020-10-27 20:06:47,996 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 68 [2020-10-27 20:06:48,330 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 78 [2020-10-27 20:06:48,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:06:48,570 INFO L93 Difference]: Finished difference Result 152 states and 201 transitions. [2020-10-27 20:06:48,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 20:06:48,573 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 61 [2020-10-27 20:06:48,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:06:48,576 INFO L225 Difference]: With dead ends: 152 [2020-10-27 20:06:48,576 INFO L226 Difference]: Without dead ends: 141 [2020-10-27 20:06:48,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=257, Invalid=1383, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 20:06:48,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-27 20:06:48,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 124. [2020-10-27 20:06:48,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-27 20:06:48,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 164 transitions. [2020-10-27 20:06:48,599 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 164 transitions. Word has length 61 [2020-10-27 20:06:48,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:06:48,600 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 164 transitions. [2020-10-27 20:06:48,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 20:06:48,600 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 164 transitions. [2020-10-27 20:06:48,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 20:06:48,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:06:48,601 INFO L422 BasicCegarLoop]: trace histogram [9, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:06:48,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 20:06:48,602 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:06:48,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:06:48,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1322361013, now seen corresponding path program 10 times [2020-10-27 20:06:48,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:06:48,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245518778] [2020-10-27 20:06:48,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:06:48,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:48,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:49,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:49,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:49,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:49,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:50,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:50,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:50,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:51,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:53,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:53,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:53,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:53,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:53,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 20:06:53,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 20:06:53,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5314 [2020-10-27 20:06:53,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:53,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 20:06:53,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 20:06:53,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 20:06:53,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:54,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:06:54,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:54,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:54,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:54,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:06:54,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:06:54,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:06:54,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:54,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:06:54,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:06:54,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:06:54,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:54,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:06:54,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:54,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:54,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:54,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:54,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 20:06:54,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:06:54,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 214 [2020-10-27 20:06:54,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:54,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:06:54,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:06:54,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 20:06:54,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:55,056 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 52 [2020-10-27 20:06:55,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-27 20:06:55,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:55,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:55,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:55,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 20:06:55,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:06:55,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-27 20:06:55,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:55,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:06:55,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:06:55,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 20:06:55,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:55,858 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2020-10-27 20:06:56,052 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-10-27 20:06:56,314 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-10-27 20:06:56,574 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-10-27 20:06:56,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-27 20:06:56,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:56,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:56,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:56,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 20:06:56,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:06:56,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:06:56,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:56,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:06:56,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:06:56,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:06:56,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:56,865 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 7 proven. 67 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 20:06:56,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245518778] [2020-10-27 20:06:56,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:06:56,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 20:06:56,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904376446] [2020-10-27 20:06:56,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 20:06:56,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:06:56,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 20:06:56,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=460, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:06:56,868 INFO L87 Difference]: Start difference. First operand 124 states and 164 transitions. Second operand 23 states. [2020-10-27 20:06:57,794 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-27 20:06:57,988 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2020-10-27 20:06:59,031 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2020-10-27 20:06:59,305 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2020-10-27 20:06:59,708 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2020-10-27 20:07:00,070 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 86 [2020-10-27 20:07:00,611 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 124 [2020-10-27 20:07:00,991 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 87 [2020-10-27 20:07:01,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:07:01,234 INFO L93 Difference]: Finished difference Result 194 states and 251 transitions. [2020-10-27 20:07:01,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 20:07:01,236 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 63 [2020-10-27 20:07:01,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:07:01,238 INFO L225 Difference]: With dead ends: 194 [2020-10-27 20:07:01,238 INFO L226 Difference]: Without dead ends: 127 [2020-10-27 20:07:01,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=173, Invalid=1387, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 20:07:01,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-27 20:07:01,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2020-10-27 20:07:01,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-27 20:07:01,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 162 transitions. [2020-10-27 20:07:01,258 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 162 transitions. Word has length 63 [2020-10-27 20:07:01,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:07:01,258 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 162 transitions. [2020-10-27 20:07:01,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 20:07:01,258 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 162 transitions. [2020-10-27 20:07:01,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 20:07:01,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:07:01,260 INFO L422 BasicCegarLoop]: trace histogram [9, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:07:01,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 20:07:01,260 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:07:01,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:07:01,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1359296885, now seen corresponding path program 11 times [2020-10-27 20:07:01,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:07:01,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3082836] [2020-10-27 20:07:01,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:07:01,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:01,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:01,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:01,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:02,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:02,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:04,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:05,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:05,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:06,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:06,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 20:07:06,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 20:07:06,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 20:07:06,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:06,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 20:07:06,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 20:07:06,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 20:07:06,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:07:06,492 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2020-10-27 20:07:06,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:07:06,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:06,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:06,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:06,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:07:06,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:07:06,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:07:06,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:06,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:07:06,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:07:06,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:07:06,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:07:06,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:07:06,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:06,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:06,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:06,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 20:07:06,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:07:06,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 20:07:06,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:06,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:07:06,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:07:06,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:07:06,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:07:06,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-27 20:07:06,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:06,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:06,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:06,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:06,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:07:06,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:07:06,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-27 20:07:06,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:06,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:07:06,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:07:06,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 20:07:06,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:07:07,883 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2020-10-27 20:07:08,134 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-27 20:07:08,515 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 70 [2020-10-27 20:07:12,481 WARN L193 SmtUtils]: Spent 3.61 s on a formula simplification. DAG size of input: 793 DAG size of output: 53 [2020-10-27 20:07:15,682 WARN L193 SmtUtils]: Spent 2.86 s on a formula simplification. DAG size of input: 731 DAG size of output: 48 [2020-10-27 20:07:18,401 WARN L193 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 705 DAG size of output: 42 [2020-10-27 20:07:18,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-27 20:07:18,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:18,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:18,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:18,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 20:07:18,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:07:18,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-27 20:07:18,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:18,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:07:18,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:07:18,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 20:07:18,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:07:19,445 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 69 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-27 20:07:19,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3082836] [2020-10-27 20:07:19,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:07:19,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 20:07:19,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274175403] [2020-10-27 20:07:19,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 20:07:19,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:07:19,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 20:07:19,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:07:19,447 INFO L87 Difference]: Start difference. First operand 124 states and 162 transitions. Second operand 24 states. [2020-10-27 20:07:20,673 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 126 [2020-10-27 20:07:20,944 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-27 20:07:21,310 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-27 20:07:21,563 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-27 20:07:22,224 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 70 [2020-10-27 20:07:22,496 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 85 [2020-10-27 20:07:22,918 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-27 20:07:23,370 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 20:07:23,883 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-27 20:07:24,265 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-27 20:07:24,584 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-27 20:07:25,038 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 20:07:25,283 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-10-27 20:07:25,982 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2020-10-27 20:07:26,344 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 84 [2020-10-27 20:07:26,910 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 119 [2020-10-27 20:07:27,630 WARN L193 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 126 [2020-10-27 20:07:27,943 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 74 [2020-10-27 20:07:28,346 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 80 [2020-10-27 20:07:28,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:07:28,680 INFO L93 Difference]: Finished difference Result 210 states and 283 transitions. [2020-10-27 20:07:28,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 20:07:28,685 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 63 [2020-10-27 20:07:28,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:07:28,687 INFO L225 Difference]: With dead ends: 210 [2020-10-27 20:07:28,687 INFO L226 Difference]: Without dead ends: 148 [2020-10-27 20:07:28,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=371, Invalid=2179, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 20:07:28,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-27 20:07:28,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 129. [2020-10-27 20:07:28,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-27 20:07:28,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 176 transitions. [2020-10-27 20:07:28,711 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 176 transitions. Word has length 63 [2020-10-27 20:07:28,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:07:28,711 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 176 transitions. [2020-10-27 20:07:28,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 20:07:28,711 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 176 transitions. [2020-10-27 20:07:28,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 20:07:28,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:07:28,713 INFO L422 BasicCegarLoop]: trace histogram [10, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:07:28,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 20:07:28,713 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:07:28,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:07:28,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1360450694, now seen corresponding path program 12 times [2020-10-27 20:07:28,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:07:28,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206867342] [2020-10-27 20:07:28,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:07:28,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:28,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:28,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:29,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:30,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:30,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:31,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:32,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:32,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:33,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:33,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 20:07:33,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 20:07:33,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 20:07:33,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:33,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 20:07:33,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 20:07:33,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 20:07:33,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:07:34,272 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2020-10-27 20:07:34,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:07:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:34,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:34,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:34,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:07:34,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:07:34,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:07:34,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:34,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:07:34,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:07:34,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:07:34,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:07:34,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:07:34,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:34,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:34,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:34,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 20:07:34,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:07:34,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 20:07:34,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:34,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:07:34,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:07:34,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:07:34,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:07:34,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-27 20:07:34,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:34,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:34,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:34,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:07:34,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:07:34,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 384 [2020-10-27 20:07:34,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:34,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:07:34,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:07:34,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 20:07:34,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:07:38,558 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-10-27 20:07:38,905 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2020-10-27 20:07:39,715 WARN L193 SmtUtils]: Spent 711.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 79 [2020-10-27 20:07:58,563 WARN L193 SmtUtils]: Spent 17.98 s on a formula simplification. DAG size of input: 1616 DAG size of output: 58 [2020-10-27 20:08:09,298 WARN L193 SmtUtils]: Spent 10.08 s on a formula simplification. DAG size of input: 1329 DAG size of output: 53