/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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/forester-heap/sll-sorted-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:33:31,844 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:33:31,847 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:33:31,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:33:31,886 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:33:31,887 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:33:31,889 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:33:31,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:33:31,894 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:33:31,895 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:33:31,897 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:33:31,898 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:33:31,899 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:33:31,900 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:33:31,901 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:33:31,903 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:33:31,904 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:33:31,907 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:33:31,924 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:33:31,927 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:33:31,934 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:33:31,938 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:33:31,939 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:33:31,941 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:33:31,947 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:33:31,952 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:33:31,952 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:33:31,954 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:33:31,955 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:33:31,957 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:33:31,957 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:33:31,958 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:33:31,960 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:33:31,961 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:33:31,962 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:33:31,963 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:33:31,963 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:33:31,964 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:33:31,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:33:31,965 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:33:31,967 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:33:31,968 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 [2020-10-28 14:33:32,034 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:33:32,035 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:33:32,040 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:33:32,040 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:33:32,041 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:33:32,041 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:33:32,041 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:33:32,042 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:33:32,042 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:33:32,043 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:33:32,044 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:33:32,044 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:33:32,045 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:33:32,045 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:33:32,045 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:33:32,046 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:33:32,046 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:33:32,046 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:33:32,047 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:33:32,047 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:33:32,047 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:33:32,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:33:32,048 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:33:32,048 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:33:32,048 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:33:32,049 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:33:32,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:33:32,049 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:33:32,049 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:33:32,050 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:33:32,556 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:33:32,601 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:33:32,604 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:33:32,606 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:33:32,607 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:33:32,608 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-sorted-2.i [2020-10-28 14:33:32,696 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cef4b85ac/89ead1f991324062a3444c30053fefba/FLAGa0bf848a8 [2020-10-28 14:33:33,340 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:33:33,340 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-sorted-2.i [2020-10-28 14:33:33,357 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cef4b85ac/89ead1f991324062a3444c30053fefba/FLAGa0bf848a8 [2020-10-28 14:33:33,619 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cef4b85ac/89ead1f991324062a3444c30053fefba [2020-10-28 14:33:33,624 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:33:33,630 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:33:33,633 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:33:33,633 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:33:33,637 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:33:33,639 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:33:33" (1/1) ... [2020-10-28 14:33:33,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50e8d613 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:33, skipping insertion in model container [2020-10-28 14:33:33,644 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:33:33" (1/1) ... [2020-10-28 14:33:33,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:33:33,727 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:33:34,209 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:33:34,224 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:33:34,283 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:33:34,356 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:33:34,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:34 WrapperNode [2020-10-28 14:33:34,357 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:33:34,358 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:33:34,358 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:33:34,359 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:33:34,374 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:34" (1/1) ... [2020-10-28 14:33:34,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:34" (1/1) ... [2020-10-28 14:33:34,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:34" (1/1) ... [2020-10-28 14:33:34,392 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:34" (1/1) ... [2020-10-28 14:33:34,439 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:34" (1/1) ... [2020-10-28 14:33:34,460 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:34" (1/1) ... [2020-10-28 14:33:34,470 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:34" (1/1) ... [2020-10-28 14:33:34,480 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:33:34,481 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:33:34,482 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:33:34,482 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:33:34,483 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:34" (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 [2020-10-28 14:33:34,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:33:34,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:33:34,564 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:33:34,564 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:33:34,564 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-28 14:33:34,564 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-28 14:33:34,565 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-28 14:33:34,565 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-28 14:33:34,565 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-28 14:33:34,565 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-28 14:33:34,565 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-28 14:33:34,565 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-28 14:33:34,566 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-28 14:33:34,566 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-28 14:33:34,566 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-28 14:33:34,566 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-28 14:33:34,566 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-28 14:33:34,566 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-28 14:33:34,566 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-28 14:33:34,567 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-28 14:33:34,567 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-28 14:33:34,567 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-28 14:33:34,567 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-28 14:33:34,567 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-28 14:33:34,567 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-28 14:33:34,567 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-28 14:33:34,568 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-28 14:33:34,568 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-28 14:33:34,568 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-28 14:33:34,568 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-28 14:33:34,568 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-28 14:33:34,568 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-28 14:33:34,568 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-28 14:33:34,568 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-28 14:33:34,569 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-28 14:33:34,569 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-28 14:33:34,569 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-28 14:33:34,569 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-28 14:33:34,569 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-28 14:33:34,569 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-28 14:33:34,569 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-28 14:33:34,570 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-28 14:33:34,570 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-28 14:33:34,570 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-28 14:33:34,570 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-28 14:33:34,570 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-28 14:33:34,571 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-28 14:33:34,571 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-28 14:33:34,571 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-28 14:33:34,571 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-28 14:33:34,571 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-28 14:33:34,571 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-28 14:33:34,571 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-28 14:33:34,572 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-28 14:33:34,572 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 14:33:34,572 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-28 14:33:34,572 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-28 14:33:34,572 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-28 14:33:34,572 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-28 14:33:34,572 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-28 14:33:34,573 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-28 14:33:34,573 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-28 14:33:34,573 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-28 14:33:34,573 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:33:34,573 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-28 14:33:34,573 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-28 14:33:34,573 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-28 14:33:34,573 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:33:34,574 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-28 14:33:34,574 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-28 14:33:34,574 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-28 14:33:34,574 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-28 14:33:34,574 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-28 14:33:34,574 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-28 14:33:34,575 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-28 14:33:34,575 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-28 14:33:34,575 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-28 14:33:34,575 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-28 14:33:34,575 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-28 14:33:34,575 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-28 14:33:34,575 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-28 14:33:34,576 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-28 14:33:34,576 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-28 14:33:34,576 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-28 14:33:34,576 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-28 14:33:34,576 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-28 14:33:34,576 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-28 14:33:34,576 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-28 14:33:34,577 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-28 14:33:34,577 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-28 14:33:34,577 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-28 14:33:34,577 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-28 14:33:34,577 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-28 14:33:34,577 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-28 14:33:34,577 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-28 14:33:34,578 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-28 14:33:34,578 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-28 14:33:34,578 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-28 14:33:34,578 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-28 14:33:34,578 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-28 14:33:34,578 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-28 14:33:34,578 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-28 14:33:34,578 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-28 14:33:34,579 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-28 14:33:34,579 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-28 14:33:34,579 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-28 14:33:34,579 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-28 14:33:34,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:33:34,579 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:33:34,579 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 14:33:34,580 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 14:33:34,580 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:33:34,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:33:34,580 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:33:34,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 14:33:34,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-28 14:33:34,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:33:34,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-28 14:33:34,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:33:34,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:33:34,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:33:34,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:33:34,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:33:35,511 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:33:35,511 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-10-28 14:33:35,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:33:35 BoogieIcfgContainer [2020-10-28 14:33:35,514 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:33:35,516 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:33:35,516 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:33:35,519 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:33:35,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:33:33" (1/3) ... [2020-10-28 14:33:35,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f8f063d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:33:35, skipping insertion in model container [2020-10-28 14:33:35,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:34" (2/3) ... [2020-10-28 14:33:35,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f8f063d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:33:35, skipping insertion in model container [2020-10-28 14:33:35,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:33:35" (3/3) ... [2020-10-28 14:33:35,523 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-sorted-2.i [2020-10-28 14:33:35,536 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:33:35,541 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:33:35,555 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:33:35,583 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:33:35,584 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:33:35,584 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:33:35,584 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:33:35,584 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:33:35,584 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:33:35,584 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:33:35,585 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:33:35,604 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states. [2020-10-28 14:33:35,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 14:33:35,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:35,611 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:35,612 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:35,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:35,619 INFO L82 PathProgramCache]: Analyzing trace with hash -988081324, now seen corresponding path program 1 times [2020-10-28 14:33:35,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:35,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892497935] [2020-10-28 14:33:35,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:35,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:35,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:35,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:36,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:36,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 14:33:36,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:33:36,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 389 [2020-10-28 14:33:36,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:36,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:36,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:36,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 14:33:36,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:36,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:33:36,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:36,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:36,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:36,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:36,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:36,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:36,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-28 14:33:36,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:36,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:36,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:36,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:36,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:36,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:36,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:36,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892497935] [2020-10-28 14:33:36,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:33:36,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:33:36,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057319458] [2020-10-28 14:33:36,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 14:33:36,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:36,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 14:33:36,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:33:36,345 INFO L87 Difference]: Start difference. First operand 72 states. Second operand 3 states. [2020-10-28 14:33:36,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:36,630 INFO L93 Difference]: Finished difference Result 125 states and 212 transitions. [2020-10-28 14:33:36,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:33:36,633 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-28 14:33:36,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:36,642 INFO L225 Difference]: With dead ends: 125 [2020-10-28 14:33:36,643 INFO L226 Difference]: Without dead ends: 56 [2020-10-28 14:33:36,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:33:36,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-28 14:33:36,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-28 14:33:36,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 14:33:36,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2020-10-28 14:33:36,693 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 12 [2020-10-28 14:33:36,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:36,694 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2020-10-28 14:33:36,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 14:33:36,694 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2020-10-28 14:33:36,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-28 14:33:36,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:36,695 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:36,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:33:36,696 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:36,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:36,697 INFO L82 PathProgramCache]: Analyzing trace with hash -775621718, now seen corresponding path program 1 times [2020-10-28 14:33:36,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:36,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332178263] [2020-10-28 14:33:36,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:36,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:36,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:36,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:36,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:36,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 14:33:36,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:33:36,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-28 14:33:36,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:36,878 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:36,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:33:36,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:36,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 14:33:36,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:36,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:36,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:36,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:36,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:36,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:36,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:36,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:33:36,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:36,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:36,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:36,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:36,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:36,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:36,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:36,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332178263] [2020-10-28 14:33:36,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:33:36,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:33:36,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745939760] [2020-10-28 14:33:36,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:33:36,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:36,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:33:36,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:33:36,987 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand 5 states. [2020-10-28 14:33:37,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:37,361 INFO L93 Difference]: Finished difference Result 93 states and 120 transitions. [2020-10-28 14:33:37,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:33:37,362 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-28 14:33:37,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:37,364 INFO L225 Difference]: With dead ends: 93 [2020-10-28 14:33:37,364 INFO L226 Difference]: Without dead ends: 89 [2020-10-28 14:33:37,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:33:37,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-28 14:33:37,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 55. [2020-10-28 14:33:37,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-28 14:33:37,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2020-10-28 14:33:37,378 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 13 [2020-10-28 14:33:37,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:37,378 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2020-10-28 14:33:37,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:33:37,379 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2020-10-28 14:33:37,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 14:33:37,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:37,380 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] [2020-10-28 14:33:37,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:33:37,380 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:37,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:37,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1182304439, now seen corresponding path program 1 times [2020-10-28 14:33:37,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:37,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015261752] [2020-10-28 14:33:37,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:37,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:37,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:37,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:37,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:37,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:37,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 14:33:37,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:33:37,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 425 [2020-10-28 14:33:37,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:37,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:37,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:33:37,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:37,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 14:33:37,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:37,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:37,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:37,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:37,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:37,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:37,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:37,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:33:37,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:37,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:37,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:37,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:37,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:37,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:37,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:37,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015261752] [2020-10-28 14:33:37,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:33:37,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:33:37,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119464397] [2020-10-28 14:33:37,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:33:37,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:37,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:33:37,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:33:37,903 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand 4 states. [2020-10-28 14:33:38,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:38,156 INFO L93 Difference]: Finished difference Result 109 states and 142 transitions. [2020-10-28 14:33:38,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:33:38,156 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-28 14:33:38,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:38,158 INFO L225 Difference]: With dead ends: 109 [2020-10-28 14:33:38,158 INFO L226 Difference]: Without dead ends: 60 [2020-10-28 14:33:38,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:33:38,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-28 14:33:38,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-28 14:33:38,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-28 14:33:38,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 75 transitions. [2020-10-28 14:33:38,170 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 75 transitions. Word has length 20 [2020-10-28 14:33:38,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:38,170 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 75 transitions. [2020-10-28 14:33:38,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:33:38,170 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 75 transitions. [2020-10-28 14:33:38,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 14:33:38,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:38,171 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] [2020-10-28 14:33:38,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:33:38,172 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:38,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:38,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1884908884, now seen corresponding path program 1 times [2020-10-28 14:33:38,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:38,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228012455] [2020-10-28 14:33:38,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:38,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:38,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:38,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:38,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:38,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 14:33:38,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:33:38,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 715 [2020-10-28 14:33:38,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:38,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:38,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:33:38,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:38,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:33:38,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:39,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:39,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:39,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:39,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:39,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:39,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:39,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:33:39,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:39,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:39,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:39,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:39,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:39,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:39,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:39,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228012455] [2020-10-28 14:33:39,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:39,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:33:39,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842396036] [2020-10-28 14:33:39,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:33:39,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:39,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:33:39,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:33:39,329 INFO L87 Difference]: Start difference. First operand 59 states and 75 transitions. Second operand 8 states. [2020-10-28 14:33:39,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:39,952 INFO L93 Difference]: Finished difference Result 109 states and 141 transitions. [2020-10-28 14:33:39,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:33:39,953 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-28 14:33:39,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:39,954 INFO L225 Difference]: With dead ends: 109 [2020-10-28 14:33:39,955 INFO L226 Difference]: Without dead ends: 105 [2020-10-28 14:33:39,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:33:39,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-28 14:33:39,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-10-28 14:33:39,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-28 14:33:39,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 95 transitions. [2020-10-28 14:33:39,967 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 95 transitions. Word has length 24 [2020-10-28 14:33:39,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:39,967 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 95 transitions. [2020-10-28 14:33:39,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:33:39,968 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 95 transitions. [2020-10-28 14:33:39,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 14:33:39,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:39,969 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] [2020-10-28 14:33:39,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:33:39,969 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:39,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:39,970 INFO L82 PathProgramCache]: Analyzing trace with hash 568386703, now seen corresponding path program 1 times [2020-10-28 14:33:39,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:39,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554428911] [2020-10-28 14:33:39,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:39,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:40,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:40,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:40,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:33:40,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:40,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-28 14:33:40,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:40,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:40,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:33:40,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:40,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 14:33:40,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:40,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:40,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:40,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:40,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:40,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:40,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:40,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:33:40,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:40,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:40,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:40,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:40,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:40,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:40,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:40,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554428911] [2020-10-28 14:33:40,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:40,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:33:40,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332651209] [2020-10-28 14:33:40,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:33:40,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:40,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:33:40,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:33:40,525 INFO L87 Difference]: Start difference. First operand 74 states and 95 transitions. Second operand 9 states. [2020-10-28 14:33:41,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:41,515 INFO L93 Difference]: Finished difference Result 120 states and 155 transitions. [2020-10-28 14:33:41,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:33:41,516 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-28 14:33:41,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:41,518 INFO L225 Difference]: With dead ends: 120 [2020-10-28 14:33:41,518 INFO L226 Difference]: Without dead ends: 116 [2020-10-28 14:33:41,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:33:41,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-28 14:33:41,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 79. [2020-10-28 14:33:41,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-28 14:33:41,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2020-10-28 14:33:41,533 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 27 [2020-10-28 14:33:41,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:41,533 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2020-10-28 14:33:41,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:33:41,533 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2020-10-28 14:33:41,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 14:33:41,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:41,535 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:41,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:33:41,535 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:41,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:41,536 INFO L82 PathProgramCache]: Analyzing trace with hash 2100308321, now seen corresponding path program 1 times [2020-10-28 14:33:41,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:41,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136427371] [2020-10-28 14:33:41,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:41,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:41,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:41,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:41,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:41,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 14:33:41,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:33:41,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 429 [2020-10-28 14:33:41,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:41,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:41,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:33:41,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:33:41,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:33:41,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:42,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:42,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:42,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:42,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:42,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:42,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:33:42,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:42,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:42,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:42,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:42,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:42,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:42,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:33:42,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136427371] [2020-10-28 14:33:42,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:33:42,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:33:42,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084359938] [2020-10-28 14:33:42,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:33:42,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:42,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:33:42,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:33:42,079 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand 4 states. [2020-10-28 14:33:42,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:42,339 INFO L93 Difference]: Finished difference Result 133 states and 172 transitions. [2020-10-28 14:33:42,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:33:42,341 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-28 14:33:42,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:42,343 INFO L225 Difference]: With dead ends: 133 [2020-10-28 14:33:42,343 INFO L226 Difference]: Without dead ends: 80 [2020-10-28 14:33:42,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:33:42,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-28 14:33:42,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-28 14:33:42,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-28 14:33:42,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 100 transitions. [2020-10-28 14:33:42,374 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 100 transitions. Word has length 28 [2020-10-28 14:33:42,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:42,375 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 100 transitions. [2020-10-28 14:33:42,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:33:42,375 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 100 transitions. [2020-10-28 14:33:42,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 14:33:42,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:42,376 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:42,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:33:42,377 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:42,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:42,377 INFO L82 PathProgramCache]: Analyzing trace with hash -505715233, now seen corresponding path program 2 times [2020-10-28 14:33:42,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:42,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193831385] [2020-10-28 14:33:42,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:42,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:42,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:42,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:43,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:43,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 14:33:43,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:33:43,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 688 [2020-10-28 14:33:43,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:43,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:43,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:33:43,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:43,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:33:43,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:43,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:43,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:43,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:43,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:43,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:43,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:43,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:33:43,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:43,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:43,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:43,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:43,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:43,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:43,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:43,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193831385] [2020-10-28 14:33:43,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:43,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:33:43,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568488179] [2020-10-28 14:33:43,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:33:43,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:43,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:33:43,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:33:43,518 INFO L87 Difference]: Start difference. First operand 79 states and 100 transitions. Second operand 9 states. [2020-10-28 14:33:44,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:44,300 INFO L93 Difference]: Finished difference Result 136 states and 174 transitions. [2020-10-28 14:33:44,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:33:44,301 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-10-28 14:33:44,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:44,303 INFO L225 Difference]: With dead ends: 136 [2020-10-28 14:33:44,303 INFO L226 Difference]: Without dead ends: 132 [2020-10-28 14:33:44,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:33:44,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-28 14:33:44,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 82. [2020-10-28 14:33:44,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-28 14:33:44,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2020-10-28 14:33:44,317 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 28 [2020-10-28 14:33:44,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:44,317 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2020-10-28 14:33:44,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:33:44,318 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2020-10-28 14:33:44,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 14:33:44,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:44,319 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] [2020-10-28 14:33:44,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:33:44,320 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:44,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:44,320 INFO L82 PathProgramCache]: Analyzing trace with hash 26299553, now seen corresponding path program 1 times [2020-10-28 14:33:44,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:44,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454139195] [2020-10-28 14:33:44,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:44,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:44,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:44,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:44,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:45,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:45,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 14:33:45,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:33:45,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1072 [2020-10-28 14:33:45,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:45,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:45,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:33:45,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:45,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:33:45,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:45,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:45,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:45,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:45,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:45,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:45,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:45,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:33:45,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:45,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:45,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:45,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:45,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:45,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:45,639 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:45,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454139195] [2020-10-28 14:33:45,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:45,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:33:45,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71970698] [2020-10-28 14:33:45,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:33:45,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:45,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:33:45,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:33:45,644 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand 9 states. [2020-10-28 14:33:46,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:46,338 INFO L93 Difference]: Finished difference Result 152 states and 197 transitions. [2020-10-28 14:33:46,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:33:46,339 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-28 14:33:46,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:46,341 INFO L225 Difference]: With dead ends: 152 [2020-10-28 14:33:46,341 INFO L226 Difference]: Without dead ends: 109 [2020-10-28 14:33:46,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:33:46,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-28 14:33:46,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 90. [2020-10-28 14:33:46,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-28 14:33:46,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2020-10-28 14:33:46,355 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 31 [2020-10-28 14:33:46,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:46,355 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2020-10-28 14:33:46,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:33:46,356 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2020-10-28 14:33:46,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 14:33:46,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:46,357 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-28 14:33:46,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:33:46,358 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:46,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:46,358 INFO L82 PathProgramCache]: Analyzing trace with hash 633019428, now seen corresponding path program 2 times [2020-10-28 14:33:46,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:46,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968903611] [2020-10-28 14:33:46,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:46,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:46,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:46,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:46,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 14:33:46,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:46,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279 [2020-10-28 14:33:46,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:46,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:46,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:33:46,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:46,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 14:33:46,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:47,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:47,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:47,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:47,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:47,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:47,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:47,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:33:47,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:47,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:47,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:47,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:47,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:47,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:47,026 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:47,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968903611] [2020-10-28 14:33:47,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:47,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:33:47,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093324813] [2020-10-28 14:33:47,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:33:47,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:47,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:33:47,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:33:47,029 INFO L87 Difference]: Start difference. First operand 90 states and 113 transitions. Second operand 11 states. [2020-10-28 14:33:48,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:48,058 INFO L93 Difference]: Finished difference Result 173 states and 220 transitions. [2020-10-28 14:33:48,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:33:48,059 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-28 14:33:48,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:48,062 INFO L225 Difference]: With dead ends: 173 [2020-10-28 14:33:48,062 INFO L226 Difference]: Without dead ends: 169 [2020-10-28 14:33:48,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:33:48,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-28 14:33:48,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 101. [2020-10-28 14:33:48,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-28 14:33:48,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 128 transitions. [2020-10-28 14:33:48,094 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 128 transitions. Word has length 31 [2020-10-28 14:33:48,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:48,097 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 128 transitions. [2020-10-28 14:33:48,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:33:48,097 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 128 transitions. [2020-10-28 14:33:48,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 14:33:48,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:48,102 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-28 14:33:48,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:33:48,102 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:48,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:48,106 INFO L82 PathProgramCache]: Analyzing trace with hash -953564188, now seen corresponding path program 1 times [2020-10-28 14:33:48,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:48,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186868402] [2020-10-28 14:33:48,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:48,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:48,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:48,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:48,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 14:33:48,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:48,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 268 [2020-10-28 14:33:48,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:48,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:48,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:33:48,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:48,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:33:48,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:48,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:48,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:48,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:48,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:48,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:48,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:48,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:33:48,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:48,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:48,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:48,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:48,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:48,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:48,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:48,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186868402] [2020-10-28 14:33:48,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:48,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:33:48,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247408652] [2020-10-28 14:33:48,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:33:48,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:48,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:33:48,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:33:48,966 INFO L87 Difference]: Start difference. First operand 101 states and 128 transitions. Second operand 10 states. [2020-10-28 14:33:49,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:49,838 INFO L93 Difference]: Finished difference Result 204 states and 261 transitions. [2020-10-28 14:33:49,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:33:49,840 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-28 14:33:49,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:49,843 INFO L225 Difference]: With dead ends: 204 [2020-10-28 14:33:49,843 INFO L226 Difference]: Without dead ends: 171 [2020-10-28 14:33:49,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:33:49,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-28 14:33:49,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 115. [2020-10-28 14:33:49,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-28 14:33:49,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 145 transitions. [2020-10-28 14:33:49,868 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 145 transitions. Word has length 31 [2020-10-28 14:33:49,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:49,869 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 145 transitions. [2020-10-28 14:33:49,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:33:49,869 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 145 transitions. [2020-10-28 14:33:49,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 14:33:49,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:49,872 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-28 14:33:49,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:33:49,873 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:49,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:49,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1346591198, now seen corresponding path program 1 times [2020-10-28 14:33:49,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:49,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862732699] [2020-10-28 14:33:49,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:49,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:49,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:49,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:50,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:50,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:50,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:50,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 14:33:50,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:33:50,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 749 [2020-10-28 14:33:50,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:50,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:50,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:33:50,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 14:33:50,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 14:33:50,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:50,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:50,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:50,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:50,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:50,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:50,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:50,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:33:50,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:50,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:50,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:50,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:50,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:50,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:50,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 14:33:50,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862732699] [2020-10-28 14:33:50,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:33:50,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:33:50,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212590675] [2020-10-28 14:33:50,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:33:50,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:50,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:33:50,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:33:50,773 INFO L87 Difference]: Start difference. First operand 115 states and 145 transitions. Second operand 6 states. [2020-10-28 14:33:51,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:51,139 INFO L93 Difference]: Finished difference Result 160 states and 206 transitions. [2020-10-28 14:33:51,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:33:51,140 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-10-28 14:33:51,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:51,141 INFO L225 Difference]: With dead ends: 160 [2020-10-28 14:33:51,141 INFO L226 Difference]: Without dead ends: 124 [2020-10-28 14:33:51,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:33:51,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-28 14:33:51,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 117. [2020-10-28 14:33:51,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-28 14:33:51,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 147 transitions. [2020-10-28 14:33:51,155 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 147 transitions. Word has length 31 [2020-10-28 14:33:51,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:51,156 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 147 transitions. [2020-10-28 14:33:51,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:33:51,156 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 147 transitions. [2020-10-28 14:33:51,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 14:33:51,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:51,157 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] [2020-10-28 14:33:51,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:33:51,157 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:51,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:51,158 INFO L82 PathProgramCache]: Analyzing trace with hash 994629411, now seen corresponding path program 1 times [2020-10-28 14:33:51,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:51,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20469878] [2020-10-28 14:33:51,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:51,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:51,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:51,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:51,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:51,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:51,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:51,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:51,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:52,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:52,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 14:33:52,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 14:33:52,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1428 [2020-10-28 14:33:52,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:52,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:52,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:33:52,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:52,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 14:33:52,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:53,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:53,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:53,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:53,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:53,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:53,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:53,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:33:53,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:53,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:53,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:53,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:53,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:53,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:53,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:33:53,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20469878] [2020-10-28 14:33:53,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:33:53,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-28 14:33:53,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894944520] [2020-10-28 14:33:53,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:33:53,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:53,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:33:53,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:33:53,093 INFO L87 Difference]: Start difference. First operand 117 states and 147 transitions. Second operand 11 states. [2020-10-28 14:33:53,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:53,944 INFO L93 Difference]: Finished difference Result 199 states and 252 transitions. [2020-10-28 14:33:53,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:33:53,945 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-28 14:33:53,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:53,947 INFO L225 Difference]: With dead ends: 199 [2020-10-28 14:33:53,948 INFO L226 Difference]: Without dead ends: 176 [2020-10-28 14:33:53,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:33:53,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-28 14:33:53,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 127. [2020-10-28 14:33:53,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-28 14:33:53,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 161 transitions. [2020-10-28 14:33:53,966 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 161 transitions. Word has length 33 [2020-10-28 14:33:53,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:53,967 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 161 transitions. [2020-10-28 14:33:53,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:33:53,967 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 161 transitions. [2020-10-28 14:33:53,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 14:33:53,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:53,968 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] [2020-10-28 14:33:53,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:33:53,969 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:53,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:53,970 INFO L82 PathProgramCache]: Analyzing trace with hash 601602401, now seen corresponding path program 1 times [2020-10-28 14:33:53,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:53,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75878413] [2020-10-28 14:33:53,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:53,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:54,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:54,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:54,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 14:33:54,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:54,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 296 [2020-10-28 14:33:54,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:54,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:54,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:33:54,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:54,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 14:33:54,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:54,823 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2020-10-28 14:33:54,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:55,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:55,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:55,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:55,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:55,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:33:55,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:55,008 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:55,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:55,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:55,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:55,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:55,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:55,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75878413] [2020-10-28 14:33:55,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:55,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:33:55,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873791353] [2020-10-28 14:33:55,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:33:55,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:55,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:33:55,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:33:55,030 INFO L87 Difference]: Start difference. First operand 127 states and 161 transitions. Second operand 11 states. [2020-10-28 14:33:56,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:56,307 INFO L93 Difference]: Finished difference Result 202 states and 254 transitions. [2020-10-28 14:33:56,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:33:56,308 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-28 14:33:56,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:56,309 INFO L225 Difference]: With dead ends: 202 [2020-10-28 14:33:56,309 INFO L226 Difference]: Without dead ends: 198 [2020-10-28 14:33:56,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:33:56,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-28 14:33:56,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 145. [2020-10-28 14:33:56,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-28 14:33:56,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 185 transitions. [2020-10-28 14:33:56,323 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 185 transitions. Word has length 33 [2020-10-28 14:33:56,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:56,323 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 185 transitions. [2020-10-28 14:33:56,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:33:56,323 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 185 transitions. [2020-10-28 14:33:56,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 14:33:56,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:56,324 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] [2020-10-28 14:33:56,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:33:56,325 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:56,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:56,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1066274918, now seen corresponding path program 1 times [2020-10-28 14:33:56,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:56,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540327486] [2020-10-28 14:33:56,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:56,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:56,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:56,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:56,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 14:33:56,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:56,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-28 14:33:56,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:56,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:56,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:33:56,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:56,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:33:56,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:56,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:56,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:56,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:56,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:56,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:56,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:56,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:33:56,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:56,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:56,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:56,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:56,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:56,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:56,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:56,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540327486] [2020-10-28 14:33:56,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:56,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:33:56,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638356164] [2020-10-28 14:33:56,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:33:56,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:56,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:33:56,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:33:56,708 INFO L87 Difference]: Start difference. First operand 145 states and 185 transitions. Second operand 9 states. [2020-10-28 14:33:57,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:57,421 INFO L93 Difference]: Finished difference Result 190 states and 240 transitions. [2020-10-28 14:33:57,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:33:57,422 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-10-28 14:33:57,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:57,424 INFO L225 Difference]: With dead ends: 190 [2020-10-28 14:33:57,424 INFO L226 Difference]: Without dead ends: 155 [2020-10-28 14:33:57,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:33:57,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-28 14:33:57,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 148. [2020-10-28 14:33:57,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-28 14:33:57,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 188 transitions. [2020-10-28 14:33:57,441 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 188 transitions. Word has length 33 [2020-10-28 14:33:57,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:57,441 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 188 transitions. [2020-10-28 14:33:57,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:33:57,441 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 188 transitions. [2020-10-28 14:33:57,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 14:33:57,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:57,442 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] [2020-10-28 14:33:57,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:33:57,443 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:57,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:57,443 INFO L82 PathProgramCache]: Analyzing trace with hash -613244957, now seen corresponding path program 1 times [2020-10-28 14:33:57,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:57,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349252856] [2020-10-28 14:33:57,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:57,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:57,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:57,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:57,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:57,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:57,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:59,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:59,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 14:33:59,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:33:59,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1912 [2020-10-28 14:33:59,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:59,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:59,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:33:59,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:59,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 14:33:59,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:59,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:59,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:59,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:59,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:59,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:59,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:59,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:33:59,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:59,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:59,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:59,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:59,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:59,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:59,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:59,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349252856] [2020-10-28 14:33:59,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:59,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:33:59,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627898248] [2020-10-28 14:33:59,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:33:59,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:59,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:33:59,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:33:59,580 INFO L87 Difference]: Start difference. First operand 148 states and 188 transitions. Second operand 8 states. [2020-10-28 14:34:00,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:00,113 INFO L93 Difference]: Finished difference Result 203 states and 255 transitions. [2020-10-28 14:34:00,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:34:00,115 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-28 14:34:00,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:00,117 INFO L225 Difference]: With dead ends: 203 [2020-10-28 14:34:00,117 INFO L226 Difference]: Without dead ends: 175 [2020-10-28 14:34:00,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:34:00,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-28 14:34:00,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 145. [2020-10-28 14:34:00,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-28 14:34:00,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 181 transitions. [2020-10-28 14:34:00,130 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 181 transitions. Word has length 33 [2020-10-28 14:34:00,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:00,131 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 181 transitions. [2020-10-28 14:34:00,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:34:00,131 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 181 transitions. [2020-10-28 14:34:00,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:34:00,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:00,132 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] [2020-10-28 14:34:00,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:34:00,132 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:00,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:00,132 INFO L82 PathProgramCache]: Analyzing trace with hash 994569579, now seen corresponding path program 1 times [2020-10-28 14:34:00,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:00,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407511114] [2020-10-28 14:34:00,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:00,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:00,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:00,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:00,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:00,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:34:00,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:34:00,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 611 [2020-10-28 14:34:00,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:00,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:00,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:34:00,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 14:34:00,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 14:34:00,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:00,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:00,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:00,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:00,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:00,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:00,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:00,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:34:00,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:00,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:00,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:00,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:00,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:00,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:00,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:34:00,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407511114] [2020-10-28 14:34:00,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:34:00,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:34:00,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280137255] [2020-10-28 14:34:00,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:34:00,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:00,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:34:00,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:34:00,856 INFO L87 Difference]: Start difference. First operand 145 states and 181 transitions. Second operand 6 states. [2020-10-28 14:34:01,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:01,176 INFO L93 Difference]: Finished difference Result 157 states and 194 transitions. [2020-10-28 14:34:01,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:34:01,177 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2020-10-28 14:34:01,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:01,178 INFO L225 Difference]: With dead ends: 157 [2020-10-28 14:34:01,178 INFO L226 Difference]: Without dead ends: 153 [2020-10-28 14:34:01,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:34:01,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-28 14:34:01,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 148. [2020-10-28 14:34:01,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-28 14:34:01,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 184 transitions. [2020-10-28 14:34:01,201 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 184 transitions. Word has length 34 [2020-10-28 14:34:01,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:01,201 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 184 transitions. [2020-10-28 14:34:01,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:34:01,202 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 184 transitions. [2020-10-28 14:34:01,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:34:01,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:01,203 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] [2020-10-28 14:34:01,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:34:01,203 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:01,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:01,204 INFO L82 PathProgramCache]: Analyzing trace with hash 185222953, now seen corresponding path program 1 times [2020-10-28 14:34:01,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:01,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405794308] [2020-10-28 14:34:01,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:01,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:01,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:01,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:01,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:01,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:01,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:01,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:01,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:01,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:34:01,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 14:34:01,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 654 [2020-10-28 14:34:01,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:01,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:01,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:34:01,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:01,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 14:34:01,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:01,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:01,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:01,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:01,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:01,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:01,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:01,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:34:01,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:01,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:01,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:01,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:01,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:01,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:01,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:34:01,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405794308] [2020-10-28 14:34:01,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:34:01,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:34:01,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30003472] [2020-10-28 14:34:01,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:34:01,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:01,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:34:01,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:34:01,994 INFO L87 Difference]: Start difference. First operand 148 states and 184 transitions. Second operand 6 states. [2020-10-28 14:34:02,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:02,363 INFO L93 Difference]: Finished difference Result 183 states and 225 transitions. [2020-10-28 14:34:02,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:34:02,363 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2020-10-28 14:34:02,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:02,365 INFO L225 Difference]: With dead ends: 183 [2020-10-28 14:34:02,365 INFO L226 Difference]: Without dead ends: 170 [2020-10-28 14:34:02,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:34:02,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-28 14:34:02,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 150. [2020-10-28 14:34:02,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-28 14:34:02,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 185 transitions. [2020-10-28 14:34:02,381 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 185 transitions. Word has length 34 [2020-10-28 14:34:02,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:02,381 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 185 transitions. [2020-10-28 14:34:02,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:34:02,381 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 185 transitions. [2020-10-28 14:34:02,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:34:02,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:02,382 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] [2020-10-28 14:34:02,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:34:02,382 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:02,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:02,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1651167082, now seen corresponding path program 1 times [2020-10-28 14:34:02,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:02,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575017404] [2020-10-28 14:34:02,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:02,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:02,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:02,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:03,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:03,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:34:03,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:34:03,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 670 [2020-10-28 14:34:03,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:03,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:03,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:34:03,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 14:34:03,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 14:34:03,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:03,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:03,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:03,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:03,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:03,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:03,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:03,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:03,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:03,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:03,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:03,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:03,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:03,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:03,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:34:03,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575017404] [2020-10-28 14:34:03,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:34:03,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:34:03,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722444743] [2020-10-28 14:34:03,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:34:03,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:03,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:34:03,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:34:03,189 INFO L87 Difference]: Start difference. First operand 150 states and 185 transitions. Second operand 6 states. [2020-10-28 14:34:03,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:03,484 INFO L93 Difference]: Finished difference Result 154 states and 188 transitions. [2020-10-28 14:34:03,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:34:03,485 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-10-28 14:34:03,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:03,486 INFO L225 Difference]: With dead ends: 154 [2020-10-28 14:34:03,486 INFO L226 Difference]: Without dead ends: 150 [2020-10-28 14:34:03,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:34:03,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-28 14:34:03,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2020-10-28 14:34:03,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-28 14:34:03,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 183 transitions. [2020-10-28 14:34:03,501 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 183 transitions. Word has length 35 [2020-10-28 14:34:03,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:03,501 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 183 transitions. [2020-10-28 14:34:03,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:34:03,501 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 183 transitions. [2020-10-28 14:34:03,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:34:03,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:03,502 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-28 14:34:03,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:34:03,502 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:03,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:03,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1750355530, now seen corresponding path program 2 times [2020-10-28 14:34:03,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:03,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445070824] [2020-10-28 14:34:03,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:03,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:03,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:03,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:03,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:04,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:04,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:34:04,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:34:04,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1038 [2020-10-28 14:34:04,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:04,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:04,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:34:04,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:04,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:34:04,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:04,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:04,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:04,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:04,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:04,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:04,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:04,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:34:04,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:04,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:04,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:04,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:04,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:04,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:04,826 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:34:04,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445070824] [2020-10-28 14:34:04,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:04,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:34:04,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155371437] [2020-10-28 14:34:04,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:34:04,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:04,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:34:04,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:34:04,828 INFO L87 Difference]: Start difference. First operand 149 states and 183 transitions. Second operand 10 states. [2020-10-28 14:34:05,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:05,713 INFO L93 Difference]: Finished difference Result 229 states and 278 transitions. [2020-10-28 14:34:05,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:34:05,715 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-10-28 14:34:05,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:05,721 INFO L225 Difference]: With dead ends: 229 [2020-10-28 14:34:05,721 INFO L226 Difference]: Without dead ends: 171 [2020-10-28 14:34:05,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:34:05,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-28 14:34:05,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 143. [2020-10-28 14:34:05,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-28 14:34:05,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 175 transitions. [2020-10-28 14:34:05,739 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 175 transitions. Word has length 35 [2020-10-28 14:34:05,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:05,739 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 175 transitions. [2020-10-28 14:34:05,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:34:05,739 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 175 transitions. [2020-10-28 14:34:05,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:34:05,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:05,740 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:05,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 14:34:05,741 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:05,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:05,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1143635655, now seen corresponding path program 3 times [2020-10-28 14:34:05,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:05,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233725387] [2020-10-28 14:34:05,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:05,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:05,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:06,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:06,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:34:06,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:06,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 331 [2020-10-28 14:34:06,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:06,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:06,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:34:06,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:06,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 14:34:06,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:34:06,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:06,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:06,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:06,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:06,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:06,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:06,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:06,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:06,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:06,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:06,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:06,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:06,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:06,510 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:06,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233725387] [2020-10-28 14:34:06,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:06,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:34:06,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162793333] [2020-10-28 14:34:06,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:34:06,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:06,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:34:06,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:34:06,514 INFO L87 Difference]: Start difference. First operand 143 states and 175 transitions. Second operand 12 states. [2020-10-28 14:34:07,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:07,686 INFO L93 Difference]: Finished difference Result 223 states and 274 transitions. [2020-10-28 14:34:07,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:34:07,689 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-28 14:34:07,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:07,691 INFO L225 Difference]: With dead ends: 223 [2020-10-28 14:34:07,691 INFO L226 Difference]: Without dead ends: 219 [2020-10-28 14:34:07,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:34:07,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-28 14:34:07,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 154. [2020-10-28 14:34:07,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-28 14:34:07,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 190 transitions. [2020-10-28 14:34:07,707 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 190 transitions. Word has length 35 [2020-10-28 14:34:07,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:07,707 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 190 transitions. [2020-10-28 14:34:07,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:34:07,707 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 190 transitions. [2020-10-28 14:34:07,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:34:07,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:07,708 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-28 14:34:07,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 14:34:07,708 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:07,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:07,709 INFO L82 PathProgramCache]: Analyzing trace with hash 234912118, now seen corresponding path program 1 times [2020-10-28 14:34:07,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:07,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188842278] [2020-10-28 14:34:07,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:07,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:07,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:07,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:07,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:08,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:08,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:34:08,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:34:08,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1125 [2020-10-28 14:34:08,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:08,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:08,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:34:08,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 14:34:08,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:34:08,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:08,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:08,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:08,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:08,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:08,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:08,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:08,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:08,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:08,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:08,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:08,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:08,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:08,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 14:34:08,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188842278] [2020-10-28 14:34:08,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:08,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 14:34:08,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568282938] [2020-10-28 14:34:08,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:34:08,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:08,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:34:08,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:34:08,970 INFO L87 Difference]: Start difference. First operand 154 states and 190 transitions. Second operand 7 states. [2020-10-28 14:34:09,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:09,452 INFO L93 Difference]: Finished difference Result 166 states and 203 transitions. [2020-10-28 14:34:09,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:34:09,452 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-10-28 14:34:09,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:09,454 INFO L225 Difference]: With dead ends: 166 [2020-10-28 14:34:09,454 INFO L226 Difference]: Without dead ends: 162 [2020-10-28 14:34:09,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:34:09,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-28 14:34:09,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 151. [2020-10-28 14:34:09,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-28 14:34:09,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 186 transitions. [2020-10-28 14:34:09,468 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 186 transitions. Word has length 35 [2020-10-28 14:34:09,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:09,468 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 186 transitions. [2020-10-28 14:34:09,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:34:09,468 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 186 transitions. [2020-10-28 14:34:09,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:34:09,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:09,469 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:09,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 14:34:09,470 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:09,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:09,470 INFO L82 PathProgramCache]: Analyzing trace with hash 841631993, now seen corresponding path program 2 times [2020-10-28 14:34:09,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:09,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717385286] [2020-10-28 14:34:09,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:09,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:09,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:09,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:09,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:34:09,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:09,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 302 [2020-10-28 14:34:09,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:09,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:09,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:34:09,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:09,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:34:09,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:10,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:10,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:10,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:10,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:10,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:10,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:10,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:10,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:10,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:10,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:10,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:10,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:10,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:10,208 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:10,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717385286] [2020-10-28 14:34:10,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:10,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:34:10,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862055426] [2020-10-28 14:34:10,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:34:10,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:10,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:34:10,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:34:10,210 INFO L87 Difference]: Start difference. First operand 151 states and 186 transitions. Second operand 11 states. [2020-10-28 14:34:11,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:11,158 INFO L93 Difference]: Finished difference Result 233 states and 282 transitions. [2020-10-28 14:34:11,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:34:11,162 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-28 14:34:11,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:11,163 INFO L225 Difference]: With dead ends: 233 [2020-10-28 14:34:11,164 INFO L226 Difference]: Without dead ends: 188 [2020-10-28 14:34:11,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:34:11,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-28 14:34:11,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 134. [2020-10-28 14:34:11,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-28 14:34:11,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 163 transitions. [2020-10-28 14:34:11,176 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 163 transitions. Word has length 35 [2020-10-28 14:34:11,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:11,177 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 163 transitions. [2020-10-28 14:34:11,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:34:11,177 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 163 transitions. [2020-10-28 14:34:11,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 14:34:11,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:11,178 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] [2020-10-28 14:34:11,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 14:34:11,178 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:11,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:11,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1924762336, now seen corresponding path program 1 times [2020-10-28 14:34:11,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:11,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510663061] [2020-10-28 14:34:11,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:11,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:11,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:11,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:11,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:11,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:12,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:12,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 14:34:12,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:34:12,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1365 [2020-10-28 14:34:12,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:12,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:12,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:34:12,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 14:34:12,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:34:12,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:12,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:12,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:12,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:12,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:12,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:12,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:12,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:34:12,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:12,645 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:12,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:12,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:12,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:12,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:12,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:34:12,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510663061] [2020-10-28 14:34:12,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:34:12,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:34:12,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3940686] [2020-10-28 14:34:12,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:34:12,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:12,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:34:12,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:34:12,655 INFO L87 Difference]: Start difference. First operand 134 states and 163 transitions. Second operand 6 states. [2020-10-28 14:34:13,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:13,034 INFO L93 Difference]: Finished difference Result 143 states and 172 transitions. [2020-10-28 14:34:13,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:34:13,035 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-10-28 14:34:13,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:13,036 INFO L225 Difference]: With dead ends: 143 [2020-10-28 14:34:13,036 INFO L226 Difference]: Without dead ends: 139 [2020-10-28 14:34:13,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:34:13,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-28 14:34:13,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 136. [2020-10-28 14:34:13,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-28 14:34:13,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 165 transitions. [2020-10-28 14:34:13,050 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 165 transitions. Word has length 36 [2020-10-28 14:34:13,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:13,050 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 165 transitions. [2020-10-28 14:34:13,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:34:13,051 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 165 transitions. [2020-10-28 14:34:13,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:34:13,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:13,051 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-28 14:34:13,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 14:34:13,052 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:13,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:13,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1661915850, now seen corresponding path program 2 times [2020-10-28 14:34:13,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:13,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54700235] [2020-10-28 14:34:13,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:13,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:13,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:13,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:13,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 14:34:13,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:13,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 424 [2020-10-28 14:34:13,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:13,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:13,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:34:13,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:13,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:34:13,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:13,831 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 20 [2020-10-28 14:34:14,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:14,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:14,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:14,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:14,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:14,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:14,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:14,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:14,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:14,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:14,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:14,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:14,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:14,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:14,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54700235] [2020-10-28 14:34:14,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:14,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:34:14,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421373877] [2020-10-28 14:34:14,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:34:14,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:14,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:34:14,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:34:14,189 INFO L87 Difference]: Start difference. First operand 136 states and 165 transitions. Second operand 11 states. [2020-10-28 14:34:14,956 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2020-10-28 14:34:15,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:15,254 INFO L93 Difference]: Finished difference Result 186 states and 221 transitions. [2020-10-28 14:34:15,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:34:15,255 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-10-28 14:34:15,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:15,257 INFO L225 Difference]: With dead ends: 186 [2020-10-28 14:34:15,257 INFO L226 Difference]: Without dead ends: 182 [2020-10-28 14:34:15,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:34:15,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-28 14:34:15,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 130. [2020-10-28 14:34:15,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-28 14:34:15,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 159 transitions. [2020-10-28 14:34:15,270 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 159 transitions. Word has length 37 [2020-10-28 14:34:15,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:15,270 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 159 transitions. [2020-10-28 14:34:15,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:34:15,270 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 159 transitions. [2020-10-28 14:34:15,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:34:15,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:15,271 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-28 14:34:15,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 14:34:15,272 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:15,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:15,272 INFO L82 PathProgramCache]: Analyzing trace with hash 965174127, now seen corresponding path program 2 times [2020-10-28 14:34:15,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:15,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959763197] [2020-10-28 14:34:15,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:15,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:15,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:15,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:15,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 14:34:15,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:15,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 286 [2020-10-28 14:34:15,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:15,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:15,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:34:15,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:15,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:34:15,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:15,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:15,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:15,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:15,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:15,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:15,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:15,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:15,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:15,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:15,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:15,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:15,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:15,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:34:15,855 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:15,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959763197] [2020-10-28 14:34:15,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:15,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:34:15,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670950305] [2020-10-28 14:34:15,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:34:15,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:15,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:34:15,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:34:15,857 INFO L87 Difference]: Start difference. First operand 130 states and 159 transitions. Second operand 11 states. [2020-10-28 14:34:17,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:17,315 INFO L93 Difference]: Finished difference Result 245 states and 293 transitions. [2020-10-28 14:34:17,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:34:17,315 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-10-28 14:34:17,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:17,317 INFO L225 Difference]: With dead ends: 245 [2020-10-28 14:34:17,317 INFO L226 Difference]: Without dead ends: 241 [2020-10-28 14:34:17,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:34:17,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-28 14:34:17,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 160. [2020-10-28 14:34:17,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-28 14:34:17,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 198 transitions. [2020-10-28 14:34:17,349 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 198 transitions. Word has length 37 [2020-10-28 14:34:17,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:17,350 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 198 transitions. [2020-10-28 14:34:17,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:34:17,350 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 198 transitions. [2020-10-28 14:34:17,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:34:17,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:17,351 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:17,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 14:34:17,351 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:17,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:17,352 INFO L82 PathProgramCache]: Analyzing trace with hash -258983184, now seen corresponding path program 1 times [2020-10-28 14:34:17,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:17,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809634470] [2020-10-28 14:34:17,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:17,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:17,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:17,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:17,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:34:17,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:17,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 266 [2020-10-28 14:34:17,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:17,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:17,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:34:17,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:17,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:34:17,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:18,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:18,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:18,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:18,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:18,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:18,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:18,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:18,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:18,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:18,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:18,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:18,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:18,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:18,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:18,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809634470] [2020-10-28 14:34:18,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:18,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:34:18,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971136976] [2020-10-28 14:34:18,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:34:18,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:18,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:34:18,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:34:18,240 INFO L87 Difference]: Start difference. First operand 160 states and 198 transitions. Second operand 12 states. [2020-10-28 14:34:19,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:19,352 INFO L93 Difference]: Finished difference Result 254 states and 308 transitions. [2020-10-28 14:34:19,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:34:19,353 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-28 14:34:19,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:19,354 INFO L225 Difference]: With dead ends: 254 [2020-10-28 14:34:19,354 INFO L226 Difference]: Without dead ends: 250 [2020-10-28 14:34:19,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:34:19,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-28 14:34:19,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 179. [2020-10-28 14:34:19,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-28 14:34:19,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 222 transitions. [2020-10-28 14:34:19,373 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 222 transitions. Word has length 39 [2020-10-28 14:34:19,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:19,374 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 222 transitions. [2020-10-28 14:34:19,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:34:19,374 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 222 transitions. [2020-10-28 14:34:19,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:34:19,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:19,375 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:19,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 14:34:19,375 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:19,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:19,375 INFO L82 PathProgramCache]: Analyzing trace with hash -652010194, now seen corresponding path program 1 times [2020-10-28 14:34:19,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:19,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971673366] [2020-10-28 14:34:19,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:19,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:19,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:19,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:19,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:20,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:20,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:34:20,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:34:20,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1294 [2020-10-28 14:34:20,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:20,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:20,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:34:20,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:20,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:34:20,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:21,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:21,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:21,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:21,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:21,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:21,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:21,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:34:21,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:21,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:21,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:21,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:21,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:21,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:21,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:34:21,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971673366] [2020-10-28 14:34:21,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:21,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:34:21,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852543849] [2020-10-28 14:34:21,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:34:21,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:21,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:34:21,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:34:21,225 INFO L87 Difference]: Start difference. First operand 179 states and 222 transitions. Second operand 12 states. [2020-10-28 14:34:22,119 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2020-10-28 14:34:23,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:23,006 INFO L93 Difference]: Finished difference Result 268 states and 324 transitions. [2020-10-28 14:34:23,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:34:23,008 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-28 14:34:23,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:23,010 INFO L225 Difference]: With dead ends: 268 [2020-10-28 14:34:23,010 INFO L226 Difference]: Without dead ends: 228 [2020-10-28 14:34:23,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:34:23,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-28 14:34:23,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 184. [2020-10-28 14:34:23,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-28 14:34:23,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 226 transitions. [2020-10-28 14:34:23,028 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 226 transitions. Word has length 39 [2020-10-28 14:34:23,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:23,028 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 226 transitions. [2020-10-28 14:34:23,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:34:23,029 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 226 transitions. [2020-10-28 14:34:23,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:34:23,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:23,029 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2020-10-28 14:34:23,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 14:34:23,030 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:23,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:23,030 INFO L82 PathProgramCache]: Analyzing trace with hash -2106988512, now seen corresponding path program 1 times [2020-10-28 14:34:23,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:23,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476654861] [2020-10-28 14:34:23,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:23,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:23,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:23,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:23,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:23,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:23,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:23,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:24,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:27,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:27,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:34:27,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 14:34:27,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4141 [2020-10-28 14:34:27,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:27,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:27,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:34:27,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:27,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:34:27,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:27,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:27,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:27,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:27,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:27,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:27,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:27,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:34:27,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:27,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:27,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:27,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:27,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:27,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:27,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:27,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476654861] [2020-10-28 14:34:27,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:27,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:34:27,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226649285] [2020-10-28 14:34:27,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:34:27,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:27,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:34:27,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:34:27,825 INFO L87 Difference]: Start difference. First operand 184 states and 226 transitions. Second operand 13 states. [2020-10-28 14:34:28,878 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2020-10-28 14:34:29,338 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-10-28 14:34:29,556 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2020-10-28 14:34:30,432 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-10-28 14:34:30,699 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2020-10-28 14:34:31,118 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-28 14:34:31,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:31,125 INFO L93 Difference]: Finished difference Result 346 states and 415 transitions. [2020-10-28 14:34:31,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 14:34:31,125 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-10-28 14:34:31,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:31,128 INFO L225 Difference]: With dead ends: 346 [2020-10-28 14:34:31,128 INFO L226 Difference]: Without dead ends: 342 [2020-10-28 14:34:31,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2020-10-28 14:34:31,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-10-28 14:34:31,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 209. [2020-10-28 14:34:31,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-10-28 14:34:31,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 253 transitions. [2020-10-28 14:34:31,155 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 253 transitions. Word has length 41 [2020-10-28 14:34:31,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:31,156 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 253 transitions. [2020-10-28 14:34:31,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:34:31,156 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 253 transitions. [2020-10-28 14:34:31,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:34:31,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:31,157 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:31,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 14:34:31,158 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:31,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:31,158 INFO L82 PathProgramCache]: Analyzing trace with hash -2140871484, now seen corresponding path program 3 times [2020-10-28 14:34:31,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:31,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [63793611] [2020-10-28 14:34:31,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:31,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:31,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:31,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:31,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:34:31,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:31,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 292 [2020-10-28 14:34:31,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:31,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:31,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:34:31,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:31,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:34:31,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:31,859 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-28 14:34:32,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:32,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:32,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:32,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:32,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:32,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:32,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:32,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:32,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:32,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:32,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:32,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:32,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:32,213 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:32,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [63793611] [2020-10-28 14:34:32,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:32,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:34:32,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380777337] [2020-10-28 14:34:32,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:34:32,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:32,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:34:32,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:34:32,215 INFO L87 Difference]: Start difference. First operand 209 states and 253 transitions. Second operand 13 states. [2020-10-28 14:34:33,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:33,863 INFO L93 Difference]: Finished difference Result 325 states and 393 transitions. [2020-10-28 14:34:33,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:34:33,864 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-10-28 14:34:33,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:33,866 INFO L225 Difference]: With dead ends: 325 [2020-10-28 14:34:33,866 INFO L226 Difference]: Without dead ends: 321 [2020-10-28 14:34:33,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:34:33,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-10-28 14:34:33,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 224. [2020-10-28 14:34:33,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-28 14:34:33,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 274 transitions. [2020-10-28 14:34:33,891 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 274 transitions. Word has length 41 [2020-10-28 14:34:33,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:33,891 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 274 transitions. [2020-10-28 14:34:33,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:34:33,892 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 274 transitions. [2020-10-28 14:34:33,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:34:33,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:33,893 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, 1] [2020-10-28 14:34:33,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 14:34:33,893 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:33,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:33,894 INFO L82 PathProgramCache]: Analyzing trace with hash 83735605, now seen corresponding path program 1 times [2020-10-28 14:34:33,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:33,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755429974] [2020-10-28 14:34:33,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:33,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:33,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:34,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:34,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 14:34:34,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:34,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-28 14:34:34,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:34,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:34,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:34:34,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:34,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:34:34,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:34,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:34,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:34,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:34,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:34,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:34,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:34,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:34,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:34,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:34,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:34,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:34,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:34,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:34,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:34:34,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755429974] [2020-10-28 14:34:34,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:34,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:34:34,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513700326] [2020-10-28 14:34:34,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:34:34,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:34,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:34:34,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:34:34,343 INFO L87 Difference]: Start difference. First operand 224 states and 274 transitions. Second operand 10 states. [2020-10-28 14:34:34,797 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-10-28 14:34:35,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:35,293 INFO L93 Difference]: Finished difference Result 334 states and 399 transitions. [2020-10-28 14:34:35,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:34:35,301 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-10-28 14:34:35,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:35,303 INFO L225 Difference]: With dead ends: 334 [2020-10-28 14:34:35,303 INFO L226 Difference]: Without dead ends: 306 [2020-10-28 14:34:35,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:34:35,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-28 14:34:35,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 249. [2020-10-28 14:34:35,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-28 14:34:35,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 303 transitions. [2020-10-28 14:34:35,331 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 303 transitions. Word has length 42 [2020-10-28 14:34:35,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:35,331 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 303 transitions. [2020-10-28 14:34:35,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:34:35,332 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 303 transitions. [2020-10-28 14:34:35,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:34:35,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:35,341 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 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] [2020-10-28 14:34:35,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 14:34:35,341 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:35,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:35,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1595897528, now seen corresponding path program 1 times [2020-10-28 14:34:35,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:35,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150673355] [2020-10-28 14:34:35,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:35,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:35,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:35,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:35,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 14:34:35,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:35,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 433 [2020-10-28 14:34:35,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:35,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:35,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:34:35,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:35,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:34:35,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:36,051 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2020-10-28 14:34:36,186 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2020-10-28 14:34:36,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:36,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:36,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:36,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:36,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:36,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:36,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:34:36,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:36,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:36,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:36,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:36,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:36,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:36,462 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:36,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150673355] [2020-10-28 14:34:36,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:36,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:34:36,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239706278] [2020-10-28 14:34:36,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:34:36,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:36,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:34:36,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:34:36,464 INFO L87 Difference]: Start difference. First operand 249 states and 303 transitions. Second operand 12 states. [2020-10-28 14:34:37,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:37,664 INFO L93 Difference]: Finished difference Result 367 states and 443 transitions. [2020-10-28 14:34:37,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:34:37,665 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2020-10-28 14:34:37,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:37,668 INFO L225 Difference]: With dead ends: 367 [2020-10-28 14:34:37,668 INFO L226 Difference]: Without dead ends: 314 [2020-10-28 14:34:37,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:34:37,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-28 14:34:37,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 270. [2020-10-28 14:34:37,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-28 14:34:37,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 328 transitions. [2020-10-28 14:34:37,696 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 328 transitions. Word has length 42 [2020-10-28 14:34:37,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:37,696 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 328 transitions. [2020-10-28 14:34:37,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:34:37,697 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 328 transitions. [2020-10-28 14:34:37,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 14:34:37,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:37,698 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, 1, 1] [2020-10-28 14:34:37,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 14:34:37,698 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:37,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:37,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1814784363, now seen corresponding path program 1 times [2020-10-28 14:34:37,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:37,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702164546] [2020-10-28 14:34:37,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:37,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:37,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:37,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:37,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:37,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:38,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:41,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:41,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:41,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:42,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:42,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 14:34:42,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 14:34:42,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 14:34:42,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:42,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:42,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:34:42,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 14:34:42,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 14:34:42,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:42,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:42,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:42,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:42,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:42,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:42,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:42,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:42,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:42,804 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:42,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:42,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:42,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:42,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:42,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 14:34:42,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702164546] [2020-10-28 14:34:42,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:34:42,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:34:42,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520073728] [2020-10-28 14:34:42,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:34:42,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:42,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:34:42,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:34:42,810 INFO L87 Difference]: Start difference. First operand 270 states and 328 transitions. Second operand 6 states. [2020-10-28 14:34:43,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:43,180 INFO L93 Difference]: Finished difference Result 275 states and 332 transitions. [2020-10-28 14:34:43,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:34:43,181 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-10-28 14:34:43,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:43,183 INFO L225 Difference]: With dead ends: 275 [2020-10-28 14:34:43,183 INFO L226 Difference]: Without dead ends: 271 [2020-10-28 14:34:43,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:34:43,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-10-28 14:34:43,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 263. [2020-10-28 14:34:43,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-10-28 14:34:43,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 320 transitions. [2020-10-28 14:34:43,211 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 320 transitions. Word has length 43 [2020-10-28 14:34:43,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:43,212 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 320 transitions. [2020-10-28 14:34:43,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:34:43,212 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 320 transitions. [2020-10-28 14:34:43,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 14:34:43,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:43,213 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-28 14:34:43,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 14:34:43,213 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:43,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:43,214 INFO L82 PathProgramCache]: Analyzing trace with hash 27234369, now seen corresponding path program 1 times [2020-10-28 14:34:43,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:43,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602834082] [2020-10-28 14:34:43,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:43,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:43,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:43,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:43,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 14:34:43,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:43,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 442 [2020-10-28 14:34:43,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:43,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:43,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:34:43,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:43,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 14:34:43,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:44,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:44,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:44,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:44,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:44,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:44,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:44,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:44,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:44,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:44,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:44,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:44,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:44,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:34:44,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602834082] [2020-10-28 14:34:44,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:44,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:34:44,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924089717] [2020-10-28 14:34:44,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:34:44,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:44,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:34:44,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:34:44,316 INFO L87 Difference]: Start difference. First operand 263 states and 320 transitions. Second operand 12 states. [2020-10-28 14:34:45,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:45,510 INFO L93 Difference]: Finished difference Result 340 states and 406 transitions. [2020-10-28 14:34:45,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:34:45,511 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-10-28 14:34:45,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:45,513 INFO L225 Difference]: With dead ends: 340 [2020-10-28 14:34:45,513 INFO L226 Difference]: Without dead ends: 336 [2020-10-28 14:34:45,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:34:45,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-10-28 14:34:45,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 263. [2020-10-28 14:34:45,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-10-28 14:34:45,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 320 transitions. [2020-10-28 14:34:45,541 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 320 transitions. Word has length 43 [2020-10-28 14:34:45,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:45,542 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 320 transitions. [2020-10-28 14:34:45,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:34:45,542 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 320 transitions. [2020-10-28 14:34:45,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 14:34:45,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:45,543 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:45,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 14:34:45,543 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:45,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:45,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1640642950, now seen corresponding path program 4 times [2020-10-28 14:34:45,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:45,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818767466] [2020-10-28 14:34:45,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:45,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:45,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:45,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:45,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 14:34:45,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:45,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-28 14:34:45,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:45,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:45,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:34:45,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:45,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:34:45,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:46,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:46,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:46,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:46,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:46,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:46,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:46,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:34:46,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:46,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:46,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:46,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:46,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:46,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:46,227 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:46,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818767466] [2020-10-28 14:34:46,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:46,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:34:46,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419873294] [2020-10-28 14:34:46,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:34:46,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:46,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:34:46,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:34:46,228 INFO L87 Difference]: Start difference. First operand 263 states and 320 transitions. Second operand 11 states. [2020-10-28 14:34:47,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:47,905 INFO L93 Difference]: Finished difference Result 381 states and 460 transitions. [2020-10-28 14:34:47,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:34:47,906 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-10-28 14:34:47,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:47,909 INFO L225 Difference]: With dead ends: 381 [2020-10-28 14:34:47,909 INFO L226 Difference]: Without dead ends: 343 [2020-10-28 14:34:47,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:34:47,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-10-28 14:34:47,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 296. [2020-10-28 14:34:47,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-10-28 14:34:47,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 362 transitions. [2020-10-28 14:34:47,941 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 362 transitions. Word has length 43 [2020-10-28 14:34:47,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:47,941 INFO L481 AbstractCegarLoop]: Abstraction has 296 states and 362 transitions. [2020-10-28 14:34:47,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:34:47,941 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 362 transitions. [2020-10-28 14:34:47,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 14:34:47,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:47,943 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1] [2020-10-28 14:34:47,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 14:34:47,943 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:47,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:47,943 INFO L82 PathProgramCache]: Analyzing trace with hash 827111157, now seen corresponding path program 2 times [2020-10-28 14:34:47,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:47,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642834315] [2020-10-28 14:34:47,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:47,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:48,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:48,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:48,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:52,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:52,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:52,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:52,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:52,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 14:34:52,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 14:34:52,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 14:34:52,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:52,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:52,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:34:52,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:52,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 14:34:52,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:53,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:53,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:53,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:53,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:53,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:53,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:53,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:53,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:53,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:53,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:53,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:53,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:53,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:53,208 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 14:34:53,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642834315] [2020-10-28 14:34:53,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:53,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:34:53,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120782977] [2020-10-28 14:34:53,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:34:53,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:53,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:34:53,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:34:53,210 INFO L87 Difference]: Start difference. First operand 296 states and 362 transitions. Second operand 10 states. [2020-10-28 14:34:53,693 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-10-28 14:34:54,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:54,145 INFO L93 Difference]: Finished difference Result 349 states and 418 transitions. [2020-10-28 14:34:54,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:34:54,145 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-10-28 14:34:54,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:54,147 INFO L225 Difference]: With dead ends: 349 [2020-10-28 14:34:54,147 INFO L226 Difference]: Without dead ends: 345 [2020-10-28 14:34:54,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:34:54,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-10-28 14:34:54,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 282. [2020-10-28 14:34:54,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-28 14:34:54,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 346 transitions. [2020-10-28 14:34:54,173 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 346 transitions. Word has length 45 [2020-10-28 14:34:54,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:54,173 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 346 transitions. [2020-10-28 14:34:54,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:34:54,174 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 346 transitions. [2020-10-28 14:34:54,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 14:34:54,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:54,175 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:54,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 14:34:54,175 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:54,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:54,175 INFO L82 PathProgramCache]: Analyzing trace with hash 793228185, now seen corresponding path program 5 times [2020-10-28 14:34:54,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:54,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238331596] [2020-10-28 14:34:54,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:54,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:54,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:54,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:54,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 14:34:54,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:54,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 409 [2020-10-28 14:34:54,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:54,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:54,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:34:54,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:54,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 14:34:54,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:55,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:55,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:55,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:55,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:55,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:55,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:55,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:55,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:55,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:55,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:55,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:55,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:55,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:55,253 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:55,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238331596] [2020-10-28 14:34:55,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:55,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:34:55,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070547660] [2020-10-28 14:34:55,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:34:55,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:55,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:34:55,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:34:55,270 INFO L87 Difference]: Start difference. First operand 282 states and 346 transitions. Second operand 14 states. [2020-10-28 14:34:55,916 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-10-28 14:34:57,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:57,336 INFO L93 Difference]: Finished difference Result 396 states and 484 transitions. [2020-10-28 14:34:57,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:34:57,337 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2020-10-28 14:34:57,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:57,339 INFO L225 Difference]: With dead ends: 396 [2020-10-28 14:34:57,339 INFO L226 Difference]: Without dead ends: 392 [2020-10-28 14:34:57,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:34:57,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2020-10-28 14:34:57,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 290. [2020-10-28 14:34:57,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2020-10-28 14:34:57,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 358 transitions. [2020-10-28 14:34:57,367 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 358 transitions. Word has length 45 [2020-10-28 14:34:57,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:57,368 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 358 transitions. [2020-10-28 14:34:57,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:34:57,368 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 358 transitions. [2020-10-28 14:34:57,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 14:34:57,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:57,369 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 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, 1, 1, 1, 1] [2020-10-28 14:34:57,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 14:34:57,369 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:57,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:57,370 INFO L82 PathProgramCache]: Analyzing trace with hash 580010627, now seen corresponding path program 2 times [2020-10-28 14:34:57,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:57,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858600582] [2020-10-28 14:34:57,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:57,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:57,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:57,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:57,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 14:34:57,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:57,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 368 [2020-10-28 14:34:57,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:57,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:57,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:34:57,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:57,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:34:57,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:58,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:58,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:58,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:58,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:58,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:58,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:58,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:58,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:58,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:58,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:58,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:58,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:58,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:58,333 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:58,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858600582] [2020-10-28 14:34:58,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:58,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:34:58,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054988841] [2020-10-28 14:34:58,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:34:58,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:58,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:34:58,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:34:58,338 INFO L87 Difference]: Start difference. First operand 290 states and 358 transitions. Second operand 13 states. [2020-10-28 14:34:59,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:59,590 INFO L93 Difference]: Finished difference Result 410 states and 500 transitions. [2020-10-28 14:34:59,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:34:59,591 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-10-28 14:34:59,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:59,592 INFO L225 Difference]: With dead ends: 410 [2020-10-28 14:34:59,593 INFO L226 Difference]: Without dead ends: 360 [2020-10-28 14:34:59,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:34:59,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-10-28 14:34:59,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 287. [2020-10-28 14:34:59,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-10-28 14:34:59,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 355 transitions. [2020-10-28 14:34:59,617 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 355 transitions. Word has length 46 [2020-10-28 14:34:59,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:59,617 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 355 transitions. [2020-10-28 14:34:59,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:34:59,617 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 355 transitions. [2020-10-28 14:34:59,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 14:34:59,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:59,618 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:59,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 14:34:59,619 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:59,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:59,619 INFO L82 PathProgramCache]: Analyzing trace with hash 530592783, now seen corresponding path program 6 times [2020-10-28 14:34:59,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:59,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804614653] [2020-10-28 14:34:59,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:59,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:59,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:59,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:59,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 14:34:59,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:59,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 277 [2020-10-28 14:34:59,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:59,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:59,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:34:59,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:59,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 14:34:59,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:00,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:00,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:00,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:00,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:00,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:00,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:35:00,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:00,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:00,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:00,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:00,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:00,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:00,336 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:00,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804614653] [2020-10-28 14:35:00,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:00,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:35:00,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381936058] [2020-10-28 14:35:00,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:35:00,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:00,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:35:00,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:35:00,338 INFO L87 Difference]: Start difference. First operand 287 states and 355 transitions. Second operand 13 states. [2020-10-28 14:35:02,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:02,611 INFO L93 Difference]: Finished difference Result 452 states and 547 transitions. [2020-10-28 14:35:02,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:35:02,612 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2020-10-28 14:35:02,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:02,614 INFO L225 Difference]: With dead ends: 452 [2020-10-28 14:35:02,614 INFO L226 Difference]: Without dead ends: 448 [2020-10-28 14:35:02,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:35:02,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2020-10-28 14:35:02,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 351. [2020-10-28 14:35:02,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-10-28 14:35:02,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 436 transitions. [2020-10-28 14:35:02,661 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 436 transitions. Word has length 47 [2020-10-28 14:35:02,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:02,661 INFO L481 AbstractCegarLoop]: Abstraction has 351 states and 436 transitions. [2020-10-28 14:35:02,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:35:02,661 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 436 transitions. [2020-10-28 14:35:02,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 14:35:02,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:02,662 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:02,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 14:35:02,663 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:02,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:02,663 INFO L82 PathProgramCache]: Analyzing trace with hash 2083481547, now seen corresponding path program 3 times [2020-10-28 14:35:02,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:02,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858551349] [2020-10-28 14:35:02,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:02,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:02,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:02,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:02,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:03,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:04,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:04,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:04,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:07,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:07,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 14:35:07,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 14:35:07,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 14:35:07,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:07,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:07,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:35:07,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:07,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 14:35:07,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:07,968 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-10-28 14:35:08,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:08,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:08,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:08,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:08,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:08,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:08,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:35:08,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:08,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:08,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:08,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:08,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:08,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:08,181 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:08,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858551349] [2020-10-28 14:35:08,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:08,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:35:08,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22372037] [2020-10-28 14:35:08,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:35:08,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:08,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:35:08,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:35:08,183 INFO L87 Difference]: Start difference. First operand 351 states and 436 transitions. Second operand 13 states. [2020-10-28 14:35:09,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:09,316 INFO L93 Difference]: Finished difference Result 400 states and 488 transitions. [2020-10-28 14:35:09,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:35:09,317 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 48 [2020-10-28 14:35:09,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:09,320 INFO L225 Difference]: With dead ends: 400 [2020-10-28 14:35:09,321 INFO L226 Difference]: Without dead ends: 396 [2020-10-28 14:35:09,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:35:09,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2020-10-28 14:35:09,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 373. [2020-10-28 14:35:09,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373 states. [2020-10-28 14:35:09,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 460 transitions. [2020-10-28 14:35:09,363 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 460 transitions. Word has length 48 [2020-10-28 14:35:09,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:09,363 INFO L481 AbstractCegarLoop]: Abstraction has 373 states and 460 transitions. [2020-10-28 14:35:09,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:35:09,363 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 460 transitions. [2020-10-28 14:35:09,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 14:35:09,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:09,365 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:09,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 14:35:09,365 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:09,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:09,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1177517178, now seen corresponding path program 1 times [2020-10-28 14:35:09,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:09,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886033816] [2020-10-28 14:35:09,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:09,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:09,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:09,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:09,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 14:35:09,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:09,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 368 [2020-10-28 14:35:09,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:09,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:09,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:35:09,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:09,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 14:35:09,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:10,307 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-10-28 14:35:10,510 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-10-28 14:35:10,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:10,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:10,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:10,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:10,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:10,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:10,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:35:10,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:10,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:10,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:10,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:10,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:10,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:10,821 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:10,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886033816] [2020-10-28 14:35:10,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:10,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:35:10,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474032280] [2020-10-28 14:35:10,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:35:10,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:10,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:35:10,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:35:10,823 INFO L87 Difference]: Start difference. First operand 373 states and 460 transitions. Second operand 13 states. [2020-10-28 14:35:11,045 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2020-10-28 14:35:11,401 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-10-28 14:35:11,952 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2020-10-28 14:35:12,506 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-10-28 14:35:12,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:12,626 INFO L93 Difference]: Finished difference Result 436 states and 530 transitions. [2020-10-28 14:35:12,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:35:12,627 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 48 [2020-10-28 14:35:12,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:12,629 INFO L225 Difference]: With dead ends: 436 [2020-10-28 14:35:12,629 INFO L226 Difference]: Without dead ends: 411 [2020-10-28 14:35:12,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:35:12,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-10-28 14:35:12,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 373. [2020-10-28 14:35:12,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373 states. [2020-10-28 14:35:12,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 460 transitions. [2020-10-28 14:35:12,672 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 460 transitions. Word has length 48 [2020-10-28 14:35:12,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:12,672 INFO L481 AbstractCegarLoop]: Abstraction has 373 states and 460 transitions. [2020-10-28 14:35:12,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:35:12,673 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 460 transitions. [2020-10-28 14:35:12,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 14:35:12,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:12,674 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:12,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 14:35:12,674 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:12,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:12,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1428506376, now seen corresponding path program 1 times [2020-10-28 14:35:12,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:12,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268504932] [2020-10-28 14:35:12,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:12,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:12,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:12,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:13,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:13,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:14,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:15,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:15,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 14:35:15,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:35:15,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2761 [2020-10-28 14:35:15,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:15,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:15,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:35:15,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:15,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 14:35:15,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:15,817 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-10-28 14:35:16,112 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-10-28 14:35:16,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:16,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:16,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:16,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:16,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:16,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:16,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:35:16,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:16,341 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:16,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:16,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:16,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:16,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:16,356 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:35:16,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268504932] [2020-10-28 14:35:16,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:16,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:35:16,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912447049] [2020-10-28 14:35:16,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:35:16,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:16,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:35:16,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:35:16,358 INFO L87 Difference]: Start difference. First operand 373 states and 460 transitions. Second operand 13 states. [2020-10-28 14:35:16,805 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-10-28 14:35:17,407 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2020-10-28 14:35:18,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:18,757 INFO L93 Difference]: Finished difference Result 424 states and 516 transitions. [2020-10-28 14:35:18,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:35:18,758 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 48 [2020-10-28 14:35:18,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:18,761 INFO L225 Difference]: With dead ends: 424 [2020-10-28 14:35:18,761 INFO L226 Difference]: Without dead ends: 399 [2020-10-28 14:35:18,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:35:18,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2020-10-28 14:35:18,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 361. [2020-10-28 14:35:18,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2020-10-28 14:35:18,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 446 transitions. [2020-10-28 14:35:18,802 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 446 transitions. Word has length 48 [2020-10-28 14:35:18,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:18,803 INFO L481 AbstractCegarLoop]: Abstraction has 361 states and 446 transitions. [2020-10-28 14:35:18,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:35:18,803 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 446 transitions. [2020-10-28 14:35:18,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 14:35:18,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:18,804 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:18,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 14:35:18,805 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:18,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:18,805 INFO L82 PathProgramCache]: Analyzing trace with hash -284202544, now seen corresponding path program 2 times [2020-10-28 14:35:18,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:18,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813185810] [2020-10-28 14:35:18,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:18,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:18,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:19,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:19,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 14:35:19,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:19,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 431 [2020-10-28 14:35:19,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:19,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:19,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:35:19,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:19,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 14:35:19,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:19,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:19,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:19,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:19,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:19,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:19,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:19,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:35:19,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:19,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:19,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:19,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:19,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:19,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:19,912 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:19,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813185810] [2020-10-28 14:35:19,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:19,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:35:19,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704666984] [2020-10-28 14:35:19,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:35:19,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:19,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:35:19,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:35:19,913 INFO L87 Difference]: Start difference. First operand 361 states and 446 transitions. Second operand 14 states. [2020-10-28 14:35:21,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:21,960 INFO L93 Difference]: Finished difference Result 466 states and 566 transitions. [2020-10-28 14:35:21,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:35:21,961 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-10-28 14:35:21,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:21,964 INFO L225 Difference]: With dead ends: 466 [2020-10-28 14:35:21,964 INFO L226 Difference]: Without dead ends: 462 [2020-10-28 14:35:21,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:35:21,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2020-10-28 14:35:22,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 367. [2020-10-28 14:35:22,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-10-28 14:35:22,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 453 transitions. [2020-10-28 14:35:22,006 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 453 transitions. Word has length 49 [2020-10-28 14:35:22,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:22,006 INFO L481 AbstractCegarLoop]: Abstraction has 367 states and 453 transitions. [2020-10-28 14:35:22,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:35:22,007 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 453 transitions. [2020-10-28 14:35:22,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 14:35:22,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:22,008 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:22,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 14:35:22,008 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:22,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:22,009 INFO L82 PathProgramCache]: Analyzing trace with hash -677229554, now seen corresponding path program 2 times [2020-10-28 14:35:22,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:22,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77465711] [2020-10-28 14:35:22,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:22,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:22,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:22,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:22,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:24,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:24,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 14:35:24,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:35:24,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2285 [2020-10-28 14:35:24,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:24,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:24,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:35:24,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:24,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 14:35:24,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:25,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:25,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:25,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:25,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:25,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:25,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:25,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:35:25,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:25,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:25,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:25,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:25,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:25,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:25,137 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 14:35:25,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77465711] [2020-10-28 14:35:25,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:25,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:35:25,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764736129] [2020-10-28 14:35:25,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:35:25,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:25,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:35:25,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:35:25,139 INFO L87 Difference]: Start difference. First operand 367 states and 453 transitions. Second operand 13 states. [2020-10-28 14:35:26,240 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 35 [2020-10-28 14:35:26,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:26,901 INFO L93 Difference]: Finished difference Result 473 states and 572 transitions. [2020-10-28 14:35:26,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:35:26,902 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-10-28 14:35:26,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:26,905 INFO L225 Difference]: With dead ends: 473 [2020-10-28 14:35:26,905 INFO L226 Difference]: Without dead ends: 432 [2020-10-28 14:35:26,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:35:26,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-10-28 14:35:26,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 359. [2020-10-28 14:35:26,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2020-10-28 14:35:26,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 431 transitions. [2020-10-28 14:35:26,947 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 431 transitions. Word has length 49 [2020-10-28 14:35:26,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:26,947 INFO L481 AbstractCegarLoop]: Abstraction has 359 states and 431 transitions. [2020-10-28 14:35:26,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:35:26,948 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 431 transitions. [2020-10-28 14:35:26,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 14:35:26,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:26,949 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:26,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 14:35:26,949 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:26,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:26,950 INFO L82 PathProgramCache]: Analyzing trace with hash -3338258, now seen corresponding path program 7 times [2020-10-28 14:35:26,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:26,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742032201] [2020-10-28 14:35:26,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:26,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:26,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:27,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:27,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 14:35:27,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:27,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 566 [2020-10-28 14:35:27,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:27,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:27,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:35:27,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:27,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 14:35:27,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:28,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:28,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:28,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:28,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:28,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:28,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:28,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:35:28,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:28,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:28,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:28,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:28,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:28,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:28,272 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:28,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742032201] [2020-10-28 14:35:28,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:28,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:35:28,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691984128] [2020-10-28 14:35:28,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:35:28,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:28,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:35:28,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:35:28,273 INFO L87 Difference]: Start difference. First operand 359 states and 431 transitions. Second operand 15 states. [2020-10-28 14:35:28,746 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2020-10-28 14:35:29,077 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-10-28 14:35:30,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:30,343 INFO L93 Difference]: Finished difference Result 447 states and 533 transitions. [2020-10-28 14:35:30,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:35:30,344 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2020-10-28 14:35:30,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:30,347 INFO L225 Difference]: With dead ends: 447 [2020-10-28 14:35:30,347 INFO L226 Difference]: Without dead ends: 443 [2020-10-28 14:35:30,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:35:30,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2020-10-28 14:35:30,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 321. [2020-10-28 14:35:30,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2020-10-28 14:35:30,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 383 transitions. [2020-10-28 14:35:30,394 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 383 transitions. Word has length 49 [2020-10-28 14:35:30,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:30,394 INFO L481 AbstractCegarLoop]: Abstraction has 321 states and 383 transitions. [2020-10-28 14:35:30,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:35:30,394 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 383 transitions. [2020-10-28 14:35:30,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 14:35:30,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:30,396 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:30,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 14:35:30,396 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:30,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:30,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1421155010, now seen corresponding path program 1 times [2020-10-28 14:35:30,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:30,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358936998] [2020-10-28 14:35:30,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:30,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:30,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:30,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:30,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:31,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:31,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:31,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:31,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:34,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:34,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:34,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:35,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:35,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 14:35:35,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 14:35:35,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-28 14:35:35,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:35,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:35,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:35:35,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:35,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 14:35:35,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:36,097 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-28 14:35:36,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:36,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:36,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:36,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:36,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:36,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:36,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:35:36,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:36,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:36,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:36,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:36,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:36,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:36,619 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 14:35:36,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358936998] [2020-10-28 14:35:36,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:36,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:35:36,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683856838] [2020-10-28 14:35:36,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:35:36,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:36,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:35:36,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:35:36,622 INFO L87 Difference]: Start difference. First operand 321 states and 383 transitions. Second operand 15 states. [2020-10-28 14:35:36,882 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2020-10-28 14:35:37,557 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-10-28 14:35:37,759 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-10-28 14:35:38,047 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-10-28 14:35:38,300 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 43 [2020-10-28 14:35:38,661 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-28 14:35:39,797 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-10-28 14:35:40,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:40,044 INFO L93 Difference]: Finished difference Result 505 states and 589 transitions. [2020-10-28 14:35:40,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 14:35:40,045 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2020-10-28 14:35:40,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:40,047 INFO L225 Difference]: With dead ends: 505 [2020-10-28 14:35:40,047 INFO L226 Difference]: Without dead ends: 501 [2020-10-28 14:35:40,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=194, Invalid=862, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:35:40,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2020-10-28 14:35:40,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 351. [2020-10-28 14:35:40,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-10-28 14:35:40,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 420 transitions. [2020-10-28 14:35:40,097 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 420 transitions. Word has length 51 [2020-10-28 14:35:40,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:40,097 INFO L481 AbstractCegarLoop]: Abstraction has 351 states and 420 transitions. [2020-10-28 14:35:40,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:35:40,097 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 420 transitions. [2020-10-28 14:35:40,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 14:35:40,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:40,099 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:40,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 14:35:40,099 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:40,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:40,099 INFO L82 PathProgramCache]: Analyzing trace with hash -465580252, now seen corresponding path program 8 times [2020-10-28 14:35:40,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:40,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501348768] [2020-10-28 14:35:40,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:40,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:40,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:40,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:40,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 14:35:40,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:40,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 602 [2020-10-28 14:35:40,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:40,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:40,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:35:40,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:40,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 14:35:40,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:41,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:41,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:41,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:41,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:41,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:41,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:41,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:35:41,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:41,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:41,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:41,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:41,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:41,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:41,372 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:41,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501348768] [2020-10-28 14:35:41,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:41,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:35:41,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626877761] [2020-10-28 14:35:41,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:35:41,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:41,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:35:41,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:35:41,374 INFO L87 Difference]: Start difference. First operand 351 states and 420 transitions. Second operand 15 states. [2020-10-28 14:35:43,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:43,492 INFO L93 Difference]: Finished difference Result 506 states and 604 transitions. [2020-10-28 14:35:43,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:35:43,493 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2020-10-28 14:35:43,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:43,495 INFO L225 Difference]: With dead ends: 506 [2020-10-28 14:35:43,495 INFO L226 Difference]: Without dead ends: 502 [2020-10-28 14:35:43,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:35:43,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-10-28 14:35:43,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 363. [2020-10-28 14:35:43,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2020-10-28 14:35:43,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 438 transitions. [2020-10-28 14:35:43,541 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 438 transitions. Word has length 51 [2020-10-28 14:35:43,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:43,541 INFO L481 AbstractCegarLoop]: Abstraction has 363 states and 438 transitions. [2020-10-28 14:35:43,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:35:43,541 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 438 transitions. [2020-10-28 14:35:43,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 14:35:43,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:43,543 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:43,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 14:35:43,543 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:43,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:43,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1266888534, now seen corresponding path program 4 times [2020-10-28 14:35:43,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:43,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724852971] [2020-10-28 14:35:43,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:43,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:43,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:43,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:43,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:43,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:48,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:48,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:48,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 14:35:48,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:35:48,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 14:35:48,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:48,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:48,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:35:48,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:48,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 14:35:48,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:49,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:49,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:49,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:49,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:49,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:49,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:49,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:35:49,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:49,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:49,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:49,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:49,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:49,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:49,186 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:49,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724852971] [2020-10-28 14:35:49,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:49,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:35:49,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179559080] [2020-10-28 14:35:49,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:35:49,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:49,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:35:49,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:35:49,188 INFO L87 Difference]: Start difference. First operand 363 states and 438 transitions. Second operand 15 states. [2020-10-28 14:35:51,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:51,479 INFO L93 Difference]: Finished difference Result 478 states and 564 transitions. [2020-10-28 14:35:51,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:35:51,480 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2020-10-28 14:35:51,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:51,482 INFO L225 Difference]: With dead ends: 478 [2020-10-28 14:35:51,482 INFO L226 Difference]: Without dead ends: 474 [2020-10-28 14:35:51,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:35:51,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-10-28 14:35:51,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 363. [2020-10-28 14:35:51,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2020-10-28 14:35:51,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 438 transitions. [2020-10-28 14:35:51,524 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 438 transitions. Word has length 52 [2020-10-28 14:35:51,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:51,524 INFO L481 AbstractCegarLoop]: Abstraction has 363 states and 438 transitions. [2020-10-28 14:35:51,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:35:51,524 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 438 transitions. [2020-10-28 14:35:51,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 14:35:51,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:51,526 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:51,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 14:35:51,526 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:51,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:51,526 INFO L82 PathProgramCache]: Analyzing trace with hash 2082002387, now seen corresponding path program 1 times [2020-10-28 14:35:51,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:51,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502410893] [2020-10-28 14:35:51,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:51,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:51,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:51,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:51,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:52,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:54,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:54,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 14:35:54,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:35:54,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3095 [2020-10-28 14:35:54,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:54,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:54,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:35:54,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:54,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 14:35:54,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:55,214 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-10-28 14:35:55,381 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-10-28 14:35:56,094 WARN L193 SmtUtils]: Spent 687.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 63 [2020-10-28 14:35:56,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:56,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:56,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:56,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:56,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:56,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:56,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:35:56,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:56,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:56,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:56,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:56,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:56,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:56,380 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 14:35:56,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502410893] [2020-10-28 14:35:56,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:56,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:35:56,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001025934] [2020-10-28 14:35:56,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:35:56,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:56,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:35:56,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:35:56,382 INFO L87 Difference]: Start difference. First operand 363 states and 438 transitions. Second operand 16 states. [2020-10-28 14:35:57,453 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2020-10-28 14:35:57,706 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2020-10-28 14:35:58,111 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-10-28 14:35:58,287 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-28 14:35:58,568 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-10-28 14:35:58,912 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2020-10-28 14:36:00,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:00,038 INFO L93 Difference]: Finished difference Result 517 states and 614 transitions. [2020-10-28 14:36:00,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 14:36:00,038 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2020-10-28 14:36:00,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:00,041 INFO L225 Difference]: With dead ends: 517 [2020-10-28 14:36:00,041 INFO L226 Difference]: Without dead ends: 492 [2020-10-28 14:36:00,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=233, Invalid=1173, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 14:36:00,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2020-10-28 14:36:00,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 385. [2020-10-28 14:36:00,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-10-28 14:36:00,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 468 transitions. [2020-10-28 14:36:00,085 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 468 transitions. Word has length 52 [2020-10-28 14:36:00,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:00,085 INFO L481 AbstractCegarLoop]: Abstraction has 385 states and 468 transitions. [2020-10-28 14:36:00,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:36:00,085 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 468 transitions. [2020-10-28 14:36:00,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 14:36:00,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:00,087 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:00,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-28 14:36:00,087 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:00,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:00,088 INFO L82 PathProgramCache]: Analyzing trace with hash 393058645, now seen corresponding path program 1 times [2020-10-28 14:36:00,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:00,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551537856] [2020-10-28 14:36:00,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:00,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:00,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:00,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:00,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 14:36:00,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:00,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 504 [2020-10-28 14:36:00,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:00,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:00,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:36:00,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:00,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 14:36:00,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:00,855 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2020-10-28 14:36:01,010 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2020-10-28 14:36:01,152 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2020-10-28 14:36:01,274 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2020-10-28 14:36:01,416 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2020-10-28 14:36:01,657 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2020-10-28 14:36:01,993 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2020-10-28 14:36:02,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:02,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:02,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:02,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:02,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:02,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:02,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:36:02,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:02,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:02,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:02,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:02,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:02,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:02,346 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:36:02,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551537856] [2020-10-28 14:36:02,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:02,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:36:02,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069199236] [2020-10-28 14:36:02,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:36:02,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:02,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:36:02,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:36:02,348 INFO L87 Difference]: Start difference. First operand 385 states and 468 transitions. Second operand 15 states. [2020-10-28 14:36:02,885 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2020-10-28 14:36:03,329 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2020-10-28 14:36:03,815 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2020-10-28 14:36:04,027 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-10-28 14:36:04,893 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-10-28 14:36:05,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:05,078 INFO L93 Difference]: Finished difference Result 573 states and 688 transitions. [2020-10-28 14:36:05,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:36:05,079 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2020-10-28 14:36:05,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:05,081 INFO L225 Difference]: With dead ends: 573 [2020-10-28 14:36:05,081 INFO L226 Difference]: Without dead ends: 548 [2020-10-28 14:36:05,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:36:05,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2020-10-28 14:36:05,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 393. [2020-10-28 14:36:05,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2020-10-28 14:36:05,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 478 transitions. [2020-10-28 14:36:05,122 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 478 transitions. Word has length 52 [2020-10-28 14:36:05,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:05,122 INFO L481 AbstractCegarLoop]: Abstraction has 393 states and 478 transitions. [2020-10-28 14:36:05,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:36:05,122 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 478 transitions. [2020-10-28 14:36:05,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 14:36:05,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:05,123 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:05,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-28 14:36:05,124 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:05,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:05,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1886953472, now seen corresponding path program 1 times [2020-10-28 14:36:05,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:05,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755746646] [2020-10-28 14:36:05,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:05,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:05,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:05,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:05,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:05,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:05,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:05,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:06,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:06,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:06,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:06,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:06,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:06,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:06,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:10,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:10,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 14:36:10,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 14:36:10,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 14:36:10,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:10,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:10,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:36:10,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:10,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 14:36:10,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:10,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:10,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:10,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:10,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:10,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:10,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:10,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:36:10,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:10,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:10,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:10,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:10,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:10,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:10,707 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 14:36:10,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755746646] [2020-10-28 14:36:10,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:10,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:36:10,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076417302] [2020-10-28 14:36:10,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:36:10,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:10,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:36:10,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:36:10,709 INFO L87 Difference]: Start difference. First operand 393 states and 478 transitions. Second operand 13 states. [2020-10-28 14:36:12,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:12,597 INFO L93 Difference]: Finished difference Result 515 states and 625 transitions. [2020-10-28 14:36:12,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:36:12,598 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-10-28 14:36:12,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:12,601 INFO L225 Difference]: With dead ends: 515 [2020-10-28 14:36:12,601 INFO L226 Difference]: Without dead ends: 501 [2020-10-28 14:36:12,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:36:12,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2020-10-28 14:36:12,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 431. [2020-10-28 14:36:12,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 431 states. [2020-10-28 14:36:12,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 528 transitions. [2020-10-28 14:36:12,653 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 528 transitions. Word has length 52 [2020-10-28 14:36:12,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:12,653 INFO L481 AbstractCegarLoop]: Abstraction has 431 states and 528 transitions. [2020-10-28 14:36:12,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:36:12,653 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 528 transitions. [2020-10-28 14:36:12,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 14:36:12,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:12,655 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:12,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-28 14:36:12,655 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:12,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:12,655 INFO L82 PathProgramCache]: Analyzing trace with hash -107191234, now seen corresponding path program 1 times [2020-10-28 14:36:12,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:12,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978730018] [2020-10-28 14:36:12,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:12,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:12,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:12,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:16,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:16,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 14:36:16,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:36:16,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3331 [2020-10-28 14:36:16,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:16,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:16,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:36:16,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:16,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 14:36:16,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:16,315 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 30 [2020-10-28 14:36:16,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:16,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:16,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:16,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:16,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:16,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:16,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:36:16,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:16,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:16,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:16,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:16,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:16,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:16,809 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:36:16,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978730018] [2020-10-28 14:36:16,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:16,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:36:16,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279732980] [2020-10-28 14:36:16,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:36:16,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:16,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:36:16,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:36:16,811 INFO L87 Difference]: Start difference. First operand 431 states and 528 transitions. Second operand 13 states. [2020-10-28 14:36:18,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:18,596 INFO L93 Difference]: Finished difference Result 538 states and 647 transitions. [2020-10-28 14:36:18,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:36:18,596 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-10-28 14:36:18,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:18,599 INFO L225 Difference]: With dead ends: 538 [2020-10-28 14:36:18,599 INFO L226 Difference]: Without dead ends: 512 [2020-10-28 14:36:18,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:36:18,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2020-10-28 14:36:18,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 429. [2020-10-28 14:36:18,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-10-28 14:36:18,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 523 transitions. [2020-10-28 14:36:18,651 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 523 transitions. Word has length 52 [2020-10-28 14:36:18,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:18,652 INFO L481 AbstractCegarLoop]: Abstraction has 429 states and 523 transitions. [2020-10-28 14:36:18,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:36:18,652 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 523 transitions. [2020-10-28 14:36:18,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 14:36:18,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:18,653 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 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] [2020-10-28 14:36:18,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-28 14:36:18,653 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:18,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:18,654 INFO L82 PathProgramCache]: Analyzing trace with hash -2030762675, now seen corresponding path program 3 times [2020-10-28 14:36:18,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:18,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975315661] [2020-10-28 14:36:18,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:18,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:18,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:18,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:18,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:20,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:20,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 14:36:20,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:36:20,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1599 [2020-10-28 14:36:20,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:20,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:20,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:36:20,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:20,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 14:36:20,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:20,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:20,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:20,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:20,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:20,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:20,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:20,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:36:20,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:20,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:20,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:20,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:20,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:20,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:20,604 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:36:20,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975315661] [2020-10-28 14:36:20,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:20,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:36:20,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928356835] [2020-10-28 14:36:20,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:36:20,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:20,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:36:20,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:36:20,605 INFO L87 Difference]: Start difference. First operand 429 states and 523 transitions. Second operand 11 states. [2020-10-28 14:36:21,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:21,855 INFO L93 Difference]: Finished difference Result 516 states and 622 transitions. [2020-10-28 14:36:21,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:36:21,856 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-10-28 14:36:21,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:21,858 INFO L225 Difference]: With dead ends: 516 [2020-10-28 14:36:21,859 INFO L226 Difference]: Without dead ends: 454 [2020-10-28 14:36:21,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:36:21,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2020-10-28 14:36:21,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 428. [2020-10-28 14:36:21,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2020-10-28 14:36:21,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 521 transitions. [2020-10-28 14:36:21,916 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 521 transitions. Word has length 52 [2020-10-28 14:36:21,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:21,916 INFO L481 AbstractCegarLoop]: Abstraction has 428 states and 521 transitions. [2020-10-28 14:36:21,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:36:21,916 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 521 transitions. [2020-10-28 14:36:21,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 14:36:21,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:21,917 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:21,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-28 14:36:21,918 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:21,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:21,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1984666187, now seen corresponding path program 1 times [2020-10-28 14:36:21,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:21,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451850507] [2020-10-28 14:36:21,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:21,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:21,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:21,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:22,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:22,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:22,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:22,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:23,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:23,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:24,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:26,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:26,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 14:36:26,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 14:36:26,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 14:36:26,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:26,938 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:26,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:36:26,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-28 14:36:26,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 14:36:26,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:27,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:27,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:27,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:27,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:27,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:27,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:27,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:36:27,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:27,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:27,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:27,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:27,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:27,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:27,024 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 14:36:27,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451850507] [2020-10-28 14:36:27,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:36:27,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:36:27,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981475346] [2020-10-28 14:36:27,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:36:27,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:27,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:36:27,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:36:27,026 INFO L87 Difference]: Start difference. First operand 428 states and 521 transitions. Second operand 5 states. [2020-10-28 14:36:27,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:27,318 INFO L93 Difference]: Finished difference Result 453 states and 546 transitions. [2020-10-28 14:36:27,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:36:27,319 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-10-28 14:36:27,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:27,321 INFO L225 Difference]: With dead ends: 453 [2020-10-28 14:36:27,321 INFO L226 Difference]: Without dead ends: 427 [2020-10-28 14:36:27,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:36:27,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2020-10-28 14:36:27,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 405. [2020-10-28 14:36:27,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 405 states. [2020-10-28 14:36:27,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 492 transitions. [2020-10-28 14:36:27,372 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 492 transitions. Word has length 53 [2020-10-28 14:36:27,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:27,372 INFO L481 AbstractCegarLoop]: Abstraction has 405 states and 492 transitions. [2020-10-28 14:36:27,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:36:27,372 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 492 transitions. [2020-10-28 14:36:27,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 14:36:27,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:27,373 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2020-10-28 14:36:27,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-28 14:36:27,373 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:27,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:27,374 INFO L82 PathProgramCache]: Analyzing trace with hash 758023843, now seen corresponding path program 1 times [2020-10-28 14:36:27,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:27,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87989647] [2020-10-28 14:36:27,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:27,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:27,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:28,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:28,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 14:36:28,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:36:28,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1120 [2020-10-28 14:36:28,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:28,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:28,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:36:28,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:28,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 14:36:28,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:29,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:29,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:29,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:29,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:29,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:29,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:29,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:36:29,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:29,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:29,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:29,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:29,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:29,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 14:36:29,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87989647] [2020-10-28 14:36:29,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:29,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:36:29,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134405152] [2020-10-28 14:36:29,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:36:29,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:29,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:36:29,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:36:29,206 INFO L87 Difference]: Start difference. First operand 405 states and 492 transitions. Second operand 13 states. [2020-10-28 14:36:29,883 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-28 14:36:30,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:30,765 INFO L93 Difference]: Finished difference Result 470 states and 563 transitions. [2020-10-28 14:36:30,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:36:30,766 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2020-10-28 14:36:30,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:30,769 INFO L225 Difference]: With dead ends: 470 [2020-10-28 14:36:30,769 INFO L226 Difference]: Without dead ends: 466 [2020-10-28 14:36:30,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:36:30,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-10-28 14:36:30,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 401. [2020-10-28 14:36:30,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 401 states. [2020-10-28 14:36:30,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 488 transitions. [2020-10-28 14:36:30,808 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 488 transitions. Word has length 53 [2020-10-28 14:36:30,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:30,809 INFO L481 AbstractCegarLoop]: Abstraction has 401 states and 488 transitions. [2020-10-28 14:36:30,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:36:30,809 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 488 transitions. [2020-10-28 14:36:30,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 14:36:30,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:30,809 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2020-10-28 14:36:30,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-28 14:36:30,810 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:30,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:30,810 INFO L82 PathProgramCache]: Analyzing trace with hash 364996833, now seen corresponding path program 2 times [2020-10-28 14:36:30,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:30,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835898863] [2020-10-28 14:36:30,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:30,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:30,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:31,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:31,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 14:36:31,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:31,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 631 [2020-10-28 14:36:31,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:31,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:31,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:36:31,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:31,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 14:36:31,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:32,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:32,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:32,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:32,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:32,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:32,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:32,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:36:32,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:32,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:32,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:32,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:32,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:32,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:32,337 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:36:32,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835898863] [2020-10-28 14:36:32,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:32,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:36:32,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527544384] [2020-10-28 14:36:32,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:36:32,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:32,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:36:32,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:36:32,339 INFO L87 Difference]: Start difference. First operand 401 states and 488 transitions. Second operand 15 states. [2020-10-28 14:36:34,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:34,510 INFO L93 Difference]: Finished difference Result 513 states and 615 transitions. [2020-10-28 14:36:34,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:36:34,511 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-10-28 14:36:34,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:34,513 INFO L225 Difference]: With dead ends: 513 [2020-10-28 14:36:34,513 INFO L226 Difference]: Without dead ends: 509 [2020-10-28 14:36:34,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:36:34,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2020-10-28 14:36:34,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 422. [2020-10-28 14:36:34,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 422 states. [2020-10-28 14:36:34,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 516 transitions. [2020-10-28 14:36:34,554 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 516 transitions. Word has length 53 [2020-10-28 14:36:34,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:34,554 INFO L481 AbstractCegarLoop]: Abstraction has 422 states and 516 transitions. [2020-10-28 14:36:34,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:36:34,554 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 516 transitions. [2020-10-28 14:36:34,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 14:36:34,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:34,555 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:34,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-28 14:36:34,555 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:34,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:34,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1302880486, now seen corresponding path program 9 times [2020-10-28 14:36:34,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:34,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065517774] [2020-10-28 14:36:34,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:34,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:34,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:34,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:34,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 14:36:34,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:34,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 316 [2020-10-28 14:36:34,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:34,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:34,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:36:34,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:34,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 14:36:34,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:35,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:35,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:35,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:35,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:35,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:35,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:35,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:36:35,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:35,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:35,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:35,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:35,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:35,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:35,378 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:36:35,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065517774] [2020-10-28 14:36:35,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:35,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:36:35,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833841826] [2020-10-28 14:36:35,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:36:35,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:35,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:36:35,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:36:35,380 INFO L87 Difference]: Start difference. First operand 422 states and 516 transitions. Second operand 13 states. [2020-10-28 14:36:38,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:38,061 INFO L93 Difference]: Finished difference Result 636 states and 770 transitions. [2020-10-28 14:36:38,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 14:36:38,062 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2020-10-28 14:36:38,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:38,066 INFO L225 Difference]: With dead ends: 636 [2020-10-28 14:36:38,066 INFO L226 Difference]: Without dead ends: 581 [2020-10-28 14:36:38,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:36:38,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2020-10-28 14:36:38,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 508. [2020-10-28 14:36:38,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2020-10-28 14:36:38,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 623 transitions. [2020-10-28 14:36:38,130 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 623 transitions. Word has length 53 [2020-10-28 14:36:38,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:38,131 INFO L481 AbstractCegarLoop]: Abstraction has 508 states and 623 transitions. [2020-10-28 14:36:38,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:36:38,131 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 623 transitions. [2020-10-28 14:36:38,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 14:36:38,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:38,132 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:38,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-28 14:36:38,132 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:38,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:38,132 INFO L82 PathProgramCache]: Analyzing trace with hash -658114475, now seen corresponding path program 1 times [2020-10-28 14:36:38,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:38,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454086228] [2020-10-28 14:36:38,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:38,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:38,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:38,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:38,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:39,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:39,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:42,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:42,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:43,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:43,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 14:36:43,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 14:36:43,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4940 [2020-10-28 14:36:43,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:43,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:43,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:36:43,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:43,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 14:36:43,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:43,546 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2020-10-28 14:36:43,860 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-10-28 14:36:44,065 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-10-28 14:36:44,260 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-10-28 14:36:44,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:44,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:44,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:44,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:44,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:44,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:44,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:36:44,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:44,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:44,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:44,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:44,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:44,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:36:44,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454086228] [2020-10-28 14:36:44,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:44,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:36:44,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404715579] [2020-10-28 14:36:44,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:36:44,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:44,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:36:44,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:36:44,611 INFO L87 Difference]: Start difference. First operand 508 states and 623 transitions. Second operand 15 states. [2020-10-28 14:36:45,632 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2020-10-28 14:36:45,826 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2020-10-28 14:36:46,020 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 37 [2020-10-28 14:36:46,420 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2020-10-28 14:36:46,613 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2020-10-28 14:36:47,022 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2020-10-28 14:36:48,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:48,014 INFO L93 Difference]: Finished difference Result 711 states and 871 transitions. [2020-10-28 14:36:48,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 14:36:48,015 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-10-28 14:36:48,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:48,019 INFO L225 Difference]: With dead ends: 711 [2020-10-28 14:36:48,020 INFO L226 Difference]: Without dead ends: 707 [2020-10-28 14:36:48,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:36:48,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2020-10-28 14:36:48,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 593. [2020-10-28 14:36:48,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 593 states. [2020-10-28 14:36:48,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 734 transitions. [2020-10-28 14:36:48,095 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 734 transitions. Word has length 53 [2020-10-28 14:36:48,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:48,095 INFO L481 AbstractCegarLoop]: Abstraction has 593 states and 734 transitions. [2020-10-28 14:36:48,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:36:48,096 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 734 transitions. [2020-10-28 14:36:48,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 14:36:48,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:48,097 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:48,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-28 14:36:48,097 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:48,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:48,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1947909079, now seen corresponding path program 1 times [2020-10-28 14:36:48,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:48,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181157209] [2020-10-28 14:36:48,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:48,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:48,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:48,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:48,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 14:36:48,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:48,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 548 [2020-10-28 14:36:48,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:48,670 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:48,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:36:48,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:48,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 14:36:48,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:49,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:49,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:49,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:49,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:49,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:49,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:49,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:36:49,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:49,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:49,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:49,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:49,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:49,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:49,573 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:36:49,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181157209] [2020-10-28 14:36:49,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:49,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:36:49,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896351662] [2020-10-28 14:36:49,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:36:49,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:49,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:36:49,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:36:49,575 INFO L87 Difference]: Start difference. First operand 593 states and 734 transitions. Second operand 15 states. [2020-10-28 14:36:50,722 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-10-28 14:36:51,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:51,315 INFO L93 Difference]: Finished difference Result 696 states and 847 transitions. [2020-10-28 14:36:51,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:36:51,316 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-10-28 14:36:51,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:51,319 INFO L225 Difference]: With dead ends: 696 [2020-10-28 14:36:51,320 INFO L226 Difference]: Without dead ends: 692 [2020-10-28 14:36:51,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:36:51,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2020-10-28 14:36:51,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 599. [2020-10-28 14:36:51,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 599 states. [2020-10-28 14:36:51,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 741 transitions. [2020-10-28 14:36:51,383 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 741 transitions. Word has length 53 [2020-10-28 14:36:51,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:51,383 INFO L481 AbstractCegarLoop]: Abstraction has 599 states and 741 transitions. [2020-10-28 14:36:51,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:36:51,383 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 741 transitions. [2020-10-28 14:36:51,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 14:36:51,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:51,385 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:51,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-28 14:36:51,385 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:51,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:51,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1018463598, now seen corresponding path program 4 times [2020-10-28 14:36:51,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:51,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472842489] [2020-10-28 14:36:51,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:51,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:51,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:52,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:52,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 14:36:52,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:52,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 651 [2020-10-28 14:36:52,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:52,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:52,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:36:52,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:52,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 14:36:52,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:52,351 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2020-10-28 14:36:52,512 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-10-28 14:36:52,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:52,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:52,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:52,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:52,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:52,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:52,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:36:52,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:52,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:52,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:52,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:52,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:52,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:52,940 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:36:52,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472842489] [2020-10-28 14:36:52,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:52,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:36:52,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777162229] [2020-10-28 14:36:52,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:36:52,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:52,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:36:52,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:36:52,942 INFO L87 Difference]: Start difference. First operand 599 states and 741 transitions. Second operand 14 states. [2020-10-28 14:36:54,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:54,831 INFO L93 Difference]: Finished difference Result 758 states and 926 transitions. [2020-10-28 14:36:54,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:36:54,833 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-10-28 14:36:54,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:54,837 INFO L225 Difference]: With dead ends: 758 [2020-10-28 14:36:54,837 INFO L226 Difference]: Without dead ends: 689 [2020-10-28 14:36:54,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:36:54,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2020-10-28 14:36:54,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 627. [2020-10-28 14:36:54,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 627 states. [2020-10-28 14:36:54,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 773 transitions. [2020-10-28 14:36:54,899 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 773 transitions. Word has length 53 [2020-10-28 14:36:54,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:54,899 INFO L481 AbstractCegarLoop]: Abstraction has 627 states and 773 transitions. [2020-10-28 14:36:54,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:36:54,899 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 773 transitions. [2020-10-28 14:36:54,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 14:36:54,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:54,900 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:54,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-28 14:36:54,901 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:54,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:54,901 INFO L82 PathProgramCache]: Analyzing trace with hash 58065344, now seen corresponding path program 5 times [2020-10-28 14:36:54,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:54,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735064390] [2020-10-28 14:36:54,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:54,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:54,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:54,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:55,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:55,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:55,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:55,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:55,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:56,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:59,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:59,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 14:36:59,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 14:36:59,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 14:36:59,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:59,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:59,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:36:59,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:59,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 14:36:59,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:00,142 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2020-10-28 14:37:00,533 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 56 [2020-10-28 14:37:00,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:37:00,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:00,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:00,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:00,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:37:00,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:00,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:37:00,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:00,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:00,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:00,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:00,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:00,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:00,904 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:37:00,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735064390] [2020-10-28 14:37:00,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:37:00,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:37:00,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140227454] [2020-10-28 14:37:00,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:37:00,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:37:00,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:37:00,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:37:00,907 INFO L87 Difference]: Start difference. First operand 627 states and 773 transitions. Second operand 13 states. [2020-10-28 14:37:01,757 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 70 [2020-10-28 14:37:02,296 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2020-10-28 14:37:03,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:37:03,144 INFO L93 Difference]: Finished difference Result 704 states and 853 transitions. [2020-10-28 14:37:03,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:37:03,145 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-10-28 14:37:03,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:37:03,148 INFO L225 Difference]: With dead ends: 704 [2020-10-28 14:37:03,148 INFO L226 Difference]: Without dead ends: 656 [2020-10-28 14:37:03,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:37:03,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2020-10-28 14:37:03,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 655. [2020-10-28 14:37:03,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 655 states. [2020-10-28 14:37:03,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 801 transitions. [2020-10-28 14:37:03,214 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 801 transitions. Word has length 55 [2020-10-28 14:37:03,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:37:03,214 INFO L481 AbstractCegarLoop]: Abstraction has 655 states and 801 transitions. [2020-10-28 14:37:03,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:37:03,214 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 801 transitions. [2020-10-28 14:37:03,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 14:37:03,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:37:03,216 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:37:03,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-28 14:37:03,216 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:37:03,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:37:03,216 INFO L82 PathProgramCache]: Analyzing trace with hash -893265991, now seen corresponding path program 10 times [2020-10-28 14:37:03,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:37:03,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101170923] [2020-10-28 14:37:03,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:37:03,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:03,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:03,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:03,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 14:37:03,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:03,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 611 [2020-10-28 14:37:03,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:03,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:03,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:37:03,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:37:03,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 14:37:03,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:04,182 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2020-10-28 14:37:04,358 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-10-28 14:37:04,513 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-10-28 14:37:04,674 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-10-28 14:37:05,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:37:05,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:05,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:05,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:05,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:37:05,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:05,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:37:05,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:05,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:05,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:05,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:05,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:05,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:05,129 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:37:05,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101170923] [2020-10-28 14:37:05,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:37:05,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:37:05,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915415365] [2020-10-28 14:37:05,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:37:05,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:37:05,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:37:05,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:37:05,130 INFO L87 Difference]: Start difference. First operand 655 states and 801 transitions. Second operand 16 states. [2020-10-28 14:37:08,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:37:08,326 INFO L93 Difference]: Finished difference Result 895 states and 1099 transitions. [2020-10-28 14:37:08,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:37:08,327 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 55 [2020-10-28 14:37:08,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:37:08,332 INFO L225 Difference]: With dead ends: 895 [2020-10-28 14:37:08,332 INFO L226 Difference]: Without dead ends: 891 [2020-10-28 14:37:08,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:37:08,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2020-10-28 14:37:08,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 667. [2020-10-28 14:37:08,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 667 states. [2020-10-28 14:37:08,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 819 transitions. [2020-10-28 14:37:08,425 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 819 transitions. Word has length 55 [2020-10-28 14:37:08,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:37:08,425 INFO L481 AbstractCegarLoop]: Abstraction has 667 states and 819 transitions. [2020-10-28 14:37:08,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:37:08,425 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 819 transitions. [2020-10-28 14:37:08,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 14:37:08,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:37:08,426 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:37:08,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-28 14:37:08,427 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:37:08,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:37:08,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1373158725, now seen corresponding path program 1 times [2020-10-28 14:37:08,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:37:08,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217091808] [2020-10-28 14:37:08,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:37:08,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:08,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:08,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:08,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:08,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 14:37:08,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:37:08,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 467 [2020-10-28 14:37:08,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:08,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:08,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:37:08,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:37:08,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 14:37:08,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:09,403 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 56 [2020-10-28 14:37:09,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:37:09,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:09,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:09,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:09,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:37:09,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:09,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:37:09,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:09,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:09,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:09,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:09,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:09,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:09,858 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 14:37:09,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217091808] [2020-10-28 14:37:09,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:37:09,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:37:09,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78045752] [2020-10-28 14:37:09,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:37:09,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:37:09,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:37:09,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:37:09,860 INFO L87 Difference]: Start difference. First operand 667 states and 819 transitions. Second operand 13 states. [2020-10-28 14:37:10,310 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2020-10-28 14:37:11,041 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-28 14:37:11,244 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 77