/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/dll-rb-cnstr_1-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:29:45,837 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:29:45,840 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:29:45,891 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:29:45,892 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:29:45,893 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:29:45,895 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:29:45,897 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:29:45,900 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:29:45,901 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:29:45,902 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:29:45,904 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:29:45,904 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:29:45,906 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:29:45,907 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:29:45,908 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:29:45,909 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:29:45,910 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:29:45,912 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:29:45,915 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:29:45,917 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:29:45,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:29:45,920 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:29:45,921 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:29:45,924 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:29:45,925 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:29:45,925 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:29:45,927 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:29:45,927 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:29:45,928 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:29:45,929 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:29:45,930 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:29:45,931 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:29:45,932 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:29:45,933 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:29:45,934 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:29:45,934 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:29:45,935 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:29:45,935 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:29:45,936 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:29:45,937 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:29:45,938 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 14:29:45,993 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:29:45,994 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:29:45,996 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:29:45,996 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:29:45,996 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:29:45,997 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:29:45,997 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:29:45,999 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:29:45,999 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:29:45,999 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:29:46,000 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:29:46,001 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:29:46,001 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:29:46,001 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:29:46,001 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:29:46,002 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:29:46,002 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:29:46,002 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:29:46,002 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:29:46,003 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:29:46,003 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:29:46,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:29:46,003 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:29:46,004 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:29:46,004 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:29:46,004 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:29:46,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:29:46,004 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:29:46,005 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:29:46,005 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:29:46,474 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:29:46,528 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:29:46,532 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:29:46,533 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:29:46,534 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:29:46,536 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-rb-cnstr_1-1.i [2020-10-28 14:29:46,621 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64abd505f/ca7e742a8ed44bf0aa45bdb2fa10e73d/FLAGb63ec1d64 [2020-10-28 14:29:47,411 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:29:47,412 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-rb-cnstr_1-1.i [2020-10-28 14:29:47,428 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64abd505f/ca7e742a8ed44bf0aa45bdb2fa10e73d/FLAGb63ec1d64 [2020-10-28 14:29:47,641 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64abd505f/ca7e742a8ed44bf0aa45bdb2fa10e73d [2020-10-28 14:29:47,647 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:29:47,657 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:29:47,659 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:29:47,660 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:29:47,664 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:29:47,665 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:29:47" (1/1) ... [2020-10-28 14:29:47,671 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58377c71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:47, skipping insertion in model container [2020-10-28 14:29:47,671 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:29:47" (1/1) ... [2020-10-28 14:29:47,681 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:29:47,753 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:29:48,159 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:29:48,173 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:29:48,275 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:29:48,349 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:29:48,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:48 WrapperNode [2020-10-28 14:29:48,351 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:29:48,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:29:48,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:29:48,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:29:48,366 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:48" (1/1) ... [2020-10-28 14:29:48,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:48" (1/1) ... [2020-10-28 14:29:48,398 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:48" (1/1) ... [2020-10-28 14:29:48,399 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:48" (1/1) ... [2020-10-28 14:29:48,440 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:48" (1/1) ... [2020-10-28 14:29:48,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:48" (1/1) ... [2020-10-28 14:29:48,464 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:48" (1/1) ... [2020-10-28 14:29:48,471 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:29:48,472 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:29:48,472 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:29:48,473 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:29:48,474 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:48" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:29:48,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:29:48,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:29:48,580 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:29:48,580 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:29:48,580 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-28 14:29:48,580 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-28 14:29:48,580 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-28 14:29:48,580 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-28 14:29:48,581 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-28 14:29:48,581 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-28 14:29:48,581 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-28 14:29:48,581 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-28 14:29:48,581 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-28 14:29:48,581 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-28 14:29:48,581 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-28 14:29:48,582 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-28 14:29:48,582 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-28 14:29:48,582 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-28 14:29:48,582 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-28 14:29:48,582 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-28 14:29:48,582 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-28 14:29:48,583 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-28 14:29:48,583 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-28 14:29:48,583 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-28 14:29:48,583 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-28 14:29:48,583 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-28 14:29:48,583 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-28 14:29:48,583 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-28 14:29:48,584 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-28 14:29:48,584 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-28 14:29:48,584 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-28 14:29:48,584 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-28 14:29:48,584 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-28 14:29:48,584 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-28 14:29:48,584 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-28 14:29:48,585 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-28 14:29:48,585 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-28 14:29:48,585 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-28 14:29:48,585 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-28 14:29:48,585 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-28 14:29:48,585 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-28 14:29:48,585 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-28 14:29:48,586 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-28 14:29:48,586 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-28 14:29:48,586 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-28 14:29:48,586 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-28 14:29:48,586 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-28 14:29:48,586 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-28 14:29:48,586 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-28 14:29:48,587 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-28 14:29:48,587 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-28 14:29:48,587 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-28 14:29:48,587 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-28 14:29:48,587 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-28 14:29:48,587 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 14:29:48,588 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-28 14:29:48,588 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-28 14:29:48,588 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-28 14:29:48,588 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-28 14:29:48,588 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-28 14:29:48,588 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-28 14:29:48,588 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-28 14:29:48,589 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-28 14:29:48,589 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:29:48,589 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-28 14:29:48,589 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-28 14:29:48,589 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-28 14:29:48,589 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:29:48,589 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-28 14:29:48,590 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-28 14:29:48,590 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-28 14:29:48,590 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-28 14:29:48,590 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-28 14:29:48,590 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-28 14:29:48,590 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-28 14:29:48,590 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-28 14:29:48,591 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-28 14:29:48,591 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-28 14:29:48,591 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-28 14:29:48,591 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-28 14:29:48,591 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-28 14:29:48,591 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-28 14:29:48,591 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-28 14:29:48,592 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-28 14:29:48,592 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-28 14:29:48,592 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-28 14:29:48,592 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-28 14:29:48,592 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-28 14:29:48,592 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-28 14:29:48,592 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-28 14:29:48,593 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-28 14:29:48,593 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-28 14:29:48,593 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-28 14:29:48,593 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-28 14:29:48,593 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-28 14:29:48,593 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-28 14:29:48,593 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-28 14:29:48,594 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-28 14:29:48,594 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-28 14:29:48,594 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-28 14:29:48,594 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-28 14:29:48,594 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-28 14:29:48,594 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-28 14:29:48,594 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-28 14:29:48,595 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-28 14:29:48,595 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-28 14:29:48,595 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-28 14:29:48,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:29:48,595 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:29:48,595 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 14:29:48,595 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 14:29:48,595 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:29:48,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:29:48,596 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:29:48,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 14:29:48,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-28 14:29:48,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:29:48,596 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-28 14:29:48,596 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:29:48,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:29:48,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:29:48,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:29:48,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:29:49,345 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:29:49,346 INFO L298 CfgBuilder]: Removed 17 assume(true) statements. [2020-10-28 14:29:49,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:29:49 BoogieIcfgContainer [2020-10-28 14:29:49,350 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:29:49,355 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:29:49,356 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:29:49,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:29:49,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:29:47" (1/3) ... [2020-10-28 14:29:49,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40dfaa87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:29:49, skipping insertion in model container [2020-10-28 14:29:49,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:48" (2/3) ... [2020-10-28 14:29:49,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40dfaa87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:29:49, skipping insertion in model container [2020-10-28 14:29:49,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:29:49" (3/3) ... [2020-10-28 14:29:49,370 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-rb-cnstr_1-1.i [2020-10-28 14:29:49,385 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:29:49,396 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:29:49,414 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:29:49,454 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:29:49,454 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:29:49,455 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:29:49,455 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:29:49,461 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:29:49,462 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:29:49,462 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:29:49,462 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:29:49,489 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2020-10-28 14:29:49,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 14:29:49,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:49,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:29:49,498 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:49,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:49,507 INFO L82 PathProgramCache]: Analyzing trace with hash 444257067, now seen corresponding path program 1 times [2020-10-28 14:29:49,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:49,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893004001] [2020-10-28 14:29:49,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:49,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:49,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:49,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:50,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:50,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 14:29:50,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:29:50,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 358 [2020-10-28 14:29:50,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:50,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:50,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:50,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 14:29:50,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:50,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:29:50,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:50,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:50,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:50,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:50,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:50,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:50,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 14:29:50,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:50,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:50,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:50,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:50,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:50,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:50,188 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 14:29:50,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893004001] [2020-10-28 14:29:50,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:29:50,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:29:50,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105483404] [2020-10-28 14:29:50,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 14:29:50,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:50,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 14:29:50,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:29:50,221 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 3 states. [2020-10-28 14:29:50,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:50,411 INFO L93 Difference]: Finished difference Result 99 states and 172 transitions. [2020-10-28 14:29:50,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:29:50,413 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-28 14:29:50,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:50,422 INFO L225 Difference]: With dead ends: 99 [2020-10-28 14:29:50,422 INFO L226 Difference]: Without dead ends: 41 [2020-10-28 14:29:50,426 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 14:29:50,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-28 14:29:50,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-28 14:29:50,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 14:29:50,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2020-10-28 14:29:50,471 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 12 [2020-10-28 14:29:50,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:50,471 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2020-10-28 14:29:50,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 14:29:50,472 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2020-10-28 14:29:50,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-28 14:29:50,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:50,472 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:29:50,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:29:50,473 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:50,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:50,474 INFO L82 PathProgramCache]: Analyzing trace with hash 571755276, now seen corresponding path program 1 times [2020-10-28 14:29:50,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:50,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481992887] [2020-10-28 14:29:50,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:50,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:50,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:50,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 14:29:50,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:50,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-28 14:29:50,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:50,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:50,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:29:50,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:50,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 14:29:50,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:50,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:50,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:50,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:50,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:50,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:50,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:50,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:29:50,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:50,736 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:50,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:50,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:50,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:50,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:50,743 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 14:29:50,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481992887] [2020-10-28 14:29:50,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:29:50,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:29:50,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690394463] [2020-10-28 14:29:50,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:29:50,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:50,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:29:50,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:29:50,747 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand 5 states. [2020-10-28 14:29:50,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:50,908 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2020-10-28 14:29:50,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:29:50,909 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-28 14:29:50,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:50,911 INFO L225 Difference]: With dead ends: 47 [2020-10-28 14:29:50,911 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 14:29:50,912 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 14:29:50,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 14:29:50,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2020-10-28 14:29:50,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 14:29:50,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-10-28 14:29:50,920 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 13 [2020-10-28 14:29:50,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:50,921 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-10-28 14:29:50,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:29:50,921 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-10-28 14:29:50,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-28 14:29:50,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:50,922 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:29:50,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:29:50,922 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:50,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:50,923 INFO L82 PathProgramCache]: Analyzing trace with hash 541512391, now seen corresponding path program 1 times [2020-10-28 14:29:50,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:50,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867940365] [2020-10-28 14:29:50,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:50,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:50,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:51,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:51,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 14:29:51,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:51,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-28 14:29:51,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:51,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:51,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:29:51,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:29:51,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 14:29:51,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:51,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:51,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:51,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:51,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:51,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:51,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:51,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:29:51,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:51,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:51,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:51,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:51,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:51,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:51,130 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 14:29:51,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867940365] [2020-10-28 14:29:51,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:29:51,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:29:51,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376535761] [2020-10-28 14:29:51,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:29:51,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:51,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:29:51,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:29:51,132 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 5 states. [2020-10-28 14:29:51,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:51,289 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2020-10-28 14:29:51,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:29:51,290 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-28 14:29:51,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:51,291 INFO L225 Difference]: With dead ends: 42 [2020-10-28 14:29:51,291 INFO L226 Difference]: Without dead ends: 38 [2020-10-28 14:29:51,292 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 14:29:51,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-28 14:29:51,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-28 14:29:51,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 14:29:51,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-10-28 14:29:51,300 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 14 [2020-10-28 14:29:51,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:51,300 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-10-28 14:29:51,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:29:51,300 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-10-28 14:29:51,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 14:29:51,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:51,302 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:29:51,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:29:51,302 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:51,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:51,303 INFO L82 PathProgramCache]: Analyzing trace with hash -38373523, now seen corresponding path program 1 times [2020-10-28 14:29:51,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:51,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951530865] [2020-10-28 14:29:51,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:51,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:51,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:51,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 14:29:51,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:51,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-28 14:29:51,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:51,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:51,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:29:51,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:51,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:29:51,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:51,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:51,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:51,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:51,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:51,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:51,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:51,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:29:51,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:51,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:51,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:51,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:51,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:51,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:29:51,628 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 14:29:51,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [951530865] [2020-10-28 14:29:51,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:29:51,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:29:51,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483695020] [2020-10-28 14:29:51,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:29:51,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:51,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:29:51,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:29:51,631 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 6 states. [2020-10-28 14:29:51,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:51,893 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2020-10-28 14:29:51,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:29:51,894 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-28 14:29:51,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:51,895 INFO L225 Difference]: With dead ends: 63 [2020-10-28 14:29:51,895 INFO L226 Difference]: Without dead ends: 59 [2020-10-28 14:29:51,897 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 14:29:51,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-28 14:29:51,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 45. [2020-10-28 14:29:51,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 14:29:51,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2020-10-28 14:29:51,914 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 16 [2020-10-28 14:29:51,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:51,915 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2020-10-28 14:29:51,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:29:51,915 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2020-10-28 14:29:51,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 14:29:51,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:51,916 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:29:51,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:29:51,916 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:51,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:51,918 INFO L82 PathProgramCache]: Analyzing trace with hash -575459649, now seen corresponding path program 1 times [2020-10-28 14:29:51,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:51,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036931405] [2020-10-28 14:29:51,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:51,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:51,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:52,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:52,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 14:29:52,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:52,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-28 14:29:52,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:52,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:52,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:29:52,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:29:52,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:29:52,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:52,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:52,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:52,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:52,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:52,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:52,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:52,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:29:52,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:52,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:52,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:52,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:52,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:52,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:52,201 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 14:29:52,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036931405] [2020-10-28 14:29:52,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:29:52,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:29:52,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168788625] [2020-10-28 14:29:52,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:29:52,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:52,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:29:52,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:29:52,203 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 5 states. [2020-10-28 14:29:52,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:52,413 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-10-28 14:29:52,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:29:52,414 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-28 14:29:52,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:52,415 INFO L225 Difference]: With dead ends: 48 [2020-10-28 14:29:52,415 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 14:29:52,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 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 14:29:52,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 14:29:52,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-28 14:29:52,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 14:29:52,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-28 14:29:52,430 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 17 [2020-10-28 14:29:52,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:52,431 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-28 14:29:52,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:29:52,431 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-28 14:29:52,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 14:29:52,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:52,432 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 14:29:52,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:29:52,432 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:52,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:52,433 INFO L82 PathProgramCache]: Analyzing trace with hash -605625927, now seen corresponding path program 1 times [2020-10-28 14:29:52,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:52,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591452014] [2020-10-28 14:29:52,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:52,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:52,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:52,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:52,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:52,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 14:29:52,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:29:52,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 312 [2020-10-28 14:29:52,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:52,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:52,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:29:52,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:52,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:29:52,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:52,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:52,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:52,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:52,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:52,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:52,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:52,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:29:52,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:52,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:52,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:52,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:52,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:52,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:52,912 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 14:29:52,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591452014] [2020-10-28 14:29:52,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:29:52,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:29:52,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436577380] [2020-10-28 14:29:52,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:29:52,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:52,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:29:52,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:29:52,918 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 6 states. [2020-10-28 14:29:53,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:53,172 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2020-10-28 14:29:53,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:29:53,172 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-28 14:29:53,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:53,173 INFO L225 Difference]: With dead ends: 71 [2020-10-28 14:29:53,174 INFO L226 Difference]: Without dead ends: 58 [2020-10-28 14:29:53,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:29:53,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-28 14:29:53,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2020-10-28 14:29:53,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-28 14:29:53,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-10-28 14:29:53,182 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 20 [2020-10-28 14:29:53,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:53,182 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-10-28 14:29:53,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:29:53,182 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-10-28 14:29:53,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 14:29:53,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:53,183 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] [2020-10-28 14:29:53,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:29:53,183 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:53,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:53,184 INFO L82 PathProgramCache]: Analyzing trace with hash 727972317, now seen corresponding path program 1 times [2020-10-28 14:29:53,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:53,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405880101] [2020-10-28 14:29:53,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:53,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:53,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:53,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:53,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 14:29:53,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:53,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-28 14:29:53,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:53,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:53,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:29:53,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:53,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 14:29:53,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:53,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:53,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:53,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:53,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:53,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:53,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:53,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:29:53,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:53,341 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:53,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:53,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:53,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:53,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:53,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:29:53,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405880101] [2020-10-28 14:29:53,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:29:53,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 14:29:53,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600058415] [2020-10-28 14:29:53,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:29:53,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:53,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:29:53,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:29:53,350 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 6 states. [2020-10-28 14:29:53,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:53,643 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-10-28 14:29:53,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:29:53,644 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-28 14:29:53,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:53,645 INFO L225 Difference]: With dead ends: 62 [2020-10-28 14:29:53,645 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 14:29:53,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:29:53,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 14:29:53,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-28 14:29:53,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 14:29:53,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2020-10-28 14:29:53,660 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 23 [2020-10-28 14:29:53,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:53,662 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2020-10-28 14:29:53,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:29:53,662 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2020-10-28 14:29:53,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 14:29:53,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:53,663 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 14:29:53,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:29:53,664 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:53,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:53,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1402037848, now seen corresponding path program 1 times [2020-10-28 14:29:53,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:53,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047194635] [2020-10-28 14:29:53,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:53,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:53,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:53,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:53,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:29:53,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:53,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 266 [2020-10-28 14:29:53,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:53,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:53,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:29:53,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:53,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 14:29:53,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:29:54,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:54,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:54,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:54,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:54,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:54,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:54,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:29:54,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:54,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:54,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:54,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:54,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:54,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:54,240 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 14:29:54,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047194635] [2020-10-28 14:29:54,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:29:54,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:29:54,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646705104] [2020-10-28 14:29:54,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:29:54,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:54,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:29:54,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:29:54,244 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 8 states. [2020-10-28 14:29:54,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:54,630 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2020-10-28 14:29:54,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:29:54,631 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-28 14:29:54,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:54,632 INFO L225 Difference]: With dead ends: 76 [2020-10-28 14:29:54,633 INFO L226 Difference]: Without dead ends: 72 [2020-10-28 14:29:54,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:29:54,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-28 14:29:54,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 55. [2020-10-28 14:29:54,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-28 14:29:54,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-10-28 14:29:54,645 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 27 [2020-10-28 14:29:54,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:54,645 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-10-28 14:29:54,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:29:54,645 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-10-28 14:29:54,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 14:29:54,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:54,646 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 14:29:54,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:29:54,647 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:54,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:54,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1203985706, now seen corresponding path program 1 times [2020-10-28 14:29:54,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:54,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044974613] [2020-10-28 14:29:54,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:54,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:54,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:54,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:54,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:29:54,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:54,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 266 [2020-10-28 14:29:54,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:54,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:54,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:29:54,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:54,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 14:29:54,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:55,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:55,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:55,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:55,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:55,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:55,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:55,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:29:55,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:55,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:55,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:55,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:55,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:55,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:29:55,167 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 14:29:55,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044974613] [2020-10-28 14:29:55,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:29:55,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:29:55,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631028899] [2020-10-28 14:29:55,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:29:55,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:55,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:29:55,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:29:55,176 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 8 states. [2020-10-28 14:29:55,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:55,565 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2020-10-28 14:29:55,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:29:55,565 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-28 14:29:55,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:55,566 INFO L225 Difference]: With dead ends: 61 [2020-10-28 14:29:55,566 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 14:29:55,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:29:55,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 14:29:55,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 38. [2020-10-28 14:29:55,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 14:29:55,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-28 14:29:55,574 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 27 [2020-10-28 14:29:55,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:55,574 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-28 14:29:55,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:29:55,575 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-28 14:29:55,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 14:29:55,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:55,576 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] [2020-10-28 14:29:55,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:29:55,576 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:55,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:55,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1358786164, now seen corresponding path program 1 times [2020-10-28 14:29:55,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:55,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404213643] [2020-10-28 14:29:55,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:55,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:55,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:55,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:55,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:56,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:56,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 14:29:56,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:29:56,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 744 [2020-10-28 14:29:56,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:56,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:56,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:29:56,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:56,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 14:29:56,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:56,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:56,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:56,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:56,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:56,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:56,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:56,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:29:56,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:56,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:56,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:56,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:56,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:56,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:56,459 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 14:29:56,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404213643] [2020-10-28 14:29:56,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:29:56,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:29:56,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447269504] [2020-10-28 14:29:56,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:29:56,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:56,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:29:56,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:29:56,462 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 8 states. [2020-10-28 14:29:56,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:56,857 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2020-10-28 14:29:56,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:29:56,858 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-28 14:29:56,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:56,859 INFO L225 Difference]: With dead ends: 81 [2020-10-28 14:29:56,860 INFO L226 Difference]: Without dead ends: 77 [2020-10-28 14:29:56,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:29:56,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-28 14:29:56,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 58. [2020-10-28 14:29:56,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 14:29:56,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2020-10-28 14:29:56,868 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 31 [2020-10-28 14:29:56,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:56,868 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2020-10-28 14:29:56,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:29:56,869 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2020-10-28 14:29:56,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 14:29:56,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:56,870 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] [2020-10-28 14:29:56,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:29:56,870 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:56,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:56,871 INFO L82 PathProgramCache]: Analyzing trace with hash -446652170, now seen corresponding path program 1 times [2020-10-28 14:29:56,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:56,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699670543] [2020-10-28 14:29:56,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:56,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:56,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:56,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:57,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:57,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:57,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 14:29:57,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:29:57,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 994 [2020-10-28 14:29:57,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:57,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:57,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:29:57,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:57,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 14:29:57,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:57,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:58,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:58,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:58,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:58,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:58,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:58,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:29:58,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:58,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:58,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:58,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:58,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:58,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:58,018 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 14:29:58,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699670543] [2020-10-28 14:29:58,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:29:58,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:29:58,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172018194] [2020-10-28 14:29:58,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:29:58,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:58,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:29:58,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:29:58,021 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand 8 states. [2020-10-28 14:29:58,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:58,379 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2020-10-28 14:29:58,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:29:58,380 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-28 14:29:58,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:58,381 INFO L225 Difference]: With dead ends: 74 [2020-10-28 14:29:58,381 INFO L226 Difference]: Without dead ends: 70 [2020-10-28 14:29:58,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:29:58,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-28 14:29:58,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 41. [2020-10-28 14:29:58,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 14:29:58,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-10-28 14:29:58,397 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 31 [2020-10-28 14:29:58,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:58,397 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-10-28 14:29:58,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:29:58,397 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-10-28 14:29:58,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:29:58,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:58,403 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 14:29:58,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:29:58,404 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:58,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:58,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1448205022, now seen corresponding path program 1 times [2020-10-28 14:29:58,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:58,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103910504] [2020-10-28 14:29:58,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:58,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:58,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:58,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:58,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:59,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:59,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:29:59,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:29:59,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 749 [2020-10-28 14:29:59,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:59,202 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:59,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:29:59,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:59,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:29:59,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:29:59,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:59,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:59,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:59,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:59,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:59,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:59,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:29:59,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:59,539 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:59,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:59,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:59,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:59,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:59,551 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 14:29:59,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103910504] [2020-10-28 14:29:59,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:29:59,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:29:59,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242850319] [2020-10-28 14:29:59,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:29:59,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:59,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:29:59,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:29:59,555 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 8 states. [2020-10-28 14:30:00,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:00,068 INFO L93 Difference]: Finished difference Result 96 states and 110 transitions. [2020-10-28 14:30:00,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:30:00,069 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-10-28 14:30:00,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:00,070 INFO L225 Difference]: With dead ends: 96 [2020-10-28 14:30:00,070 INFO L226 Difference]: Without dead ends: 82 [2020-10-28 14:30:00,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:30:00,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-28 14:30:00,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 60. [2020-10-28 14:30:00,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 14:30:00,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2020-10-28 14:30:00,094 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 34 [2020-10-28 14:30:00,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:00,095 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2020-10-28 14:30:00,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:30:00,095 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2020-10-28 14:30:00,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:30:00,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:00,096 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] [2020-10-28 14:30:00,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:30:00,097 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:00,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:00,097 INFO L82 PathProgramCache]: Analyzing trace with hash -695799998, now seen corresponding path program 1 times [2020-10-28 14:30:00,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:00,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629043459] [2020-10-28 14:30:00,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:00,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:00,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:00,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:00,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:30:00,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:00,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-28 14:30:00,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:00,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:00,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:30:00,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:00,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 14:30:00,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:00,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:00,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:00,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:00,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:00,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:00,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:00,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:00,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:00,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:00,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:00,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:00,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:00,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:00,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:00,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629043459] [2020-10-28 14:30:00,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:00,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:30:00,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928691906] [2020-10-28 14:30:00,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:30:00,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:00,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:30:00,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:30:00,685 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 9 states. [2020-10-28 14:30:01,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:01,257 INFO L93 Difference]: Finished difference Result 106 states and 121 transitions. [2020-10-28 14:30:01,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:30:01,257 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-28 14:30:01,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:01,260 INFO L225 Difference]: With dead ends: 106 [2020-10-28 14:30:01,260 INFO L226 Difference]: Without dead ends: 93 [2020-10-28 14:30:01,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:30:01,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-28 14:30:01,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 80. [2020-10-28 14:30:01,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-28 14:30:01,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2020-10-28 14:30:01,280 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 34 [2020-10-28 14:30:01,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:01,280 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2020-10-28 14:30:01,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:30:01,281 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2020-10-28 14:30:01,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:30:01,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:01,287 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 14:30:01,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:30:01,287 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:01,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:01,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1510244636, now seen corresponding path program 1 times [2020-10-28 14:30:01,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:01,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489032352] [2020-10-28 14:30:01,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:01,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:01,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:01,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:01,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:01,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:30:01,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:30:01,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 689 [2020-10-28 14:30:01,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:01,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:01,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:30:01,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:01,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:30:01,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:02,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:02,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:02,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:02,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:02,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:02,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:02,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:02,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:02,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:02,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:02,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:02,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:02,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:02,236 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 14:30:02,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489032352] [2020-10-28 14:30:02,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:02,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:30:02,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428836660] [2020-10-28 14:30:02,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:30:02,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:02,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:30:02,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:30:02,239 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 8 states. [2020-10-28 14:30:02,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:02,700 INFO L93 Difference]: Finished difference Result 144 states and 162 transitions. [2020-10-28 14:30:02,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:30:02,701 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-10-28 14:30:02,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:02,702 INFO L225 Difference]: With dead ends: 144 [2020-10-28 14:30:02,703 INFO L226 Difference]: Without dead ends: 130 [2020-10-28 14:30:02,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:30:02,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-28 14:30:02,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 90. [2020-10-28 14:30:02,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-28 14:30:02,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2020-10-28 14:30:02,714 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 34 [2020-10-28 14:30:02,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:02,714 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2020-10-28 14:30:02,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:30:02,715 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2020-10-28 14:30:02,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:30:02,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:02,716 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] [2020-10-28 14:30:02,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:30:02,716 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:02,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:02,717 INFO L82 PathProgramCache]: Analyzing trace with hash -633760384, now seen corresponding path program 1 times [2020-10-28 14:30:02,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:02,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518591724] [2020-10-28 14:30:02,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:02,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:02,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:03,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:03,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:30:03,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:03,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 287 [2020-10-28 14:30:03,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:03,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:03,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:30:03,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:03,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:30:03,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:03,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:03,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:03,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:03,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:03,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:03,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:03,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:03,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:03,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:03,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:03,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:03,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:03,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:03,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:03,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518591724] [2020-10-28 14:30:03,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:03,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:30:03,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783422056] [2020-10-28 14:30:03,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:30:03,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:03,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:30:03,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:30:03,213 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand 9 states. [2020-10-28 14:30:04,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:04,041 INFO L93 Difference]: Finished difference Result 129 states and 146 transitions. [2020-10-28 14:30:04,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:30:04,049 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-28 14:30:04,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:04,050 INFO L225 Difference]: With dead ends: 129 [2020-10-28 14:30:04,050 INFO L226 Difference]: Without dead ends: 125 [2020-10-28 14:30:04,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:30:04,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-28 14:30:04,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 99. [2020-10-28 14:30:04,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-28 14:30:04,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2020-10-28 14:30:04,061 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 34 [2020-10-28 14:30:04,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:04,061 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2020-10-28 14:30:04,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:30:04,061 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2020-10-28 14:30:04,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:30:04,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:04,062 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 14:30:04,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:30:04,062 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:04,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:04,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1293216844, now seen corresponding path program 2 times [2020-10-28 14:30:04,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:04,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801623047] [2020-10-28 14:30:04,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:04,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:04,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:04,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:04,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 14:30:04,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:04,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 183 [2020-10-28 14:30:04,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:04,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:04,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:30:04,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:04,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 14:30:04,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:04,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:04,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:04,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:04,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:04,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:04,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:04,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:30:04,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:04,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:04,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:04,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:04,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:04,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:30:04,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:04,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801623047] [2020-10-28 14:30:04,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:04,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:30:04,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868890347] [2020-10-28 14:30:04,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:30:04,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:04,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:30:04,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:30:04,504 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand 9 states. [2020-10-28 14:30:05,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:05,032 INFO L93 Difference]: Finished difference Result 116 states and 128 transitions. [2020-10-28 14:30:05,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:30:05,033 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-10-28 14:30:05,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:05,034 INFO L225 Difference]: With dead ends: 116 [2020-10-28 14:30:05,034 INFO L226 Difference]: Without dead ends: 90 [2020-10-28 14:30:05,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:30:05,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-28 14:30:05,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-28 14:30:05,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-28 14:30:05,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2020-10-28 14:30:05,043 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 37 [2020-10-28 14:30:05,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:05,044 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2020-10-28 14:30:05,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:30:05,044 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2020-10-28 14:30:05,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:30:05,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:05,045 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] [2020-10-28 14:30:05,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:30:05,045 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:05,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:05,045 INFO L82 PathProgramCache]: Analyzing trace with hash -2057975726, now seen corresponding path program 1 times [2020-10-28 14:30:05,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:05,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159873820] [2020-10-28 14:30:05,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:05,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:05,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:05,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:05,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 14:30:05,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:05,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 412 [2020-10-28 14:30:05,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:05,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:05,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:30:05,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:05,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:30:05,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:30:05,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:05,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:05,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:05,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:05,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:05,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:05,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:05,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:05,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:05,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:05,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:05,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:05,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:05,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:05,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159873820] [2020-10-28 14:30:05,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:05,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:30:05,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263516527] [2020-10-28 14:30:05,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:30:05,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:05,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:30:05,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:30:05,693 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand 10 states. [2020-10-28 14:30:06,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:06,419 INFO L93 Difference]: Finished difference Result 115 states and 129 transitions. [2020-10-28 14:30:06,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:30:06,419 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-10-28 14:30:06,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:06,420 INFO L225 Difference]: With dead ends: 115 [2020-10-28 14:30:06,420 INFO L226 Difference]: Without dead ends: 111 [2020-10-28 14:30:06,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:30:06,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-28 14:30:06,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-10-28 14:30:06,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-28 14:30:06,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2020-10-28 14:30:06,430 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 37 [2020-10-28 14:30:06,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:06,431 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2020-10-28 14:30:06,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:30:06,431 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2020-10-28 14:30:06,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:30:06,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:06,432 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 14:30:06,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:30:06,432 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:06,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:06,433 INFO L82 PathProgramCache]: Analyzing trace with hash 92986550, now seen corresponding path program 2 times [2020-10-28 14:30:06,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:06,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172643915] [2020-10-28 14:30:06,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:06,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:06,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:06,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:07,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:07,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 14:30:07,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:30:07,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1056 [2020-10-28 14:30:07,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:07,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:07,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:30:07,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:07,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 14:30:07,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:07,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:07,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:07,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:07,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:07,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:07,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:07,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:07,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:07,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:07,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:07,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:07,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:07,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:07,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:07,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172643915] [2020-10-28 14:30:07,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:07,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:30:07,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407503218] [2020-10-28 14:30:07,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:30:07,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:07,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:30:07,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:30:07,856 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand 10 states. [2020-10-28 14:30:08,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:08,553 INFO L93 Difference]: Finished difference Result 124 states and 140 transitions. [2020-10-28 14:30:08,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:30:08,554 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-10-28 14:30:08,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:08,555 INFO L225 Difference]: With dead ends: 124 [2020-10-28 14:30:08,555 INFO L226 Difference]: Without dead ends: 111 [2020-10-28 14:30:08,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:30:08,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-28 14:30:08,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 97. [2020-10-28 14:30:08,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-28 14:30:08,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 107 transitions. [2020-10-28 14:30:08,565 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 107 transitions. Word has length 37 [2020-10-28 14:30:08,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:08,566 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 107 transitions. [2020-10-28 14:30:08,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:30:08,566 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 107 transitions. [2020-10-28 14:30:08,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 14:30:08,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:08,567 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-28 14:30:08,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:30:08,567 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:08,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:08,567 INFO L82 PathProgramCache]: Analyzing trace with hash -319241792, now seen corresponding path program 3 times [2020-10-28 14:30:08,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:08,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380547283] [2020-10-28 14:30:08,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:08,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:08,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:08,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:09,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:09,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 14:30:09,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:30:09,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1098 [2020-10-28 14:30:09,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:09,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:09,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:30:09,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:09,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:30:09,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:09,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:09,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:09,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:09,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:09,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:09,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:09,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:09,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:09,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:09,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:09,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:09,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:09,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:09,888 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:09,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380547283] [2020-10-28 14:30:09,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:09,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:30:09,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997433958] [2020-10-28 14:30:09,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:30:09,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:09,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:30:09,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:30:09,892 INFO L87 Difference]: Start difference. First operand 97 states and 107 transitions. Second operand 10 states. [2020-10-28 14:30:10,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:10,814 INFO L93 Difference]: Finished difference Result 116 states and 129 transitions. [2020-10-28 14:30:10,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:30:10,816 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-28 14:30:10,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:10,817 INFO L225 Difference]: With dead ends: 116 [2020-10-28 14:30:10,817 INFO L226 Difference]: Without dead ends: 82 [2020-10-28 14:30:10,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:30:10,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-28 14:30:10,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-28 14:30:10,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-28 14:30:10,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2020-10-28 14:30:10,825 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 40 [2020-10-28 14:30:10,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:10,826 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2020-10-28 14:30:10,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:30:10,826 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2020-10-28 14:30:10,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 14:30:10,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:10,827 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:10,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 14:30:10,827 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:10,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:10,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1316952253, now seen corresponding path program 3 times [2020-10-28 14:30:10,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:10,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404911067] [2020-10-28 14:30:10,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:10,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:10,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:11,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:11,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:11,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 14:30:11,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:30:11,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 827 [2020-10-28 14:30:11,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:11,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:11,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:30:11,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:11,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 14:30:11,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:11,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:11,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:11,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:11,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:11,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:11,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:11,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:11,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:11,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:11,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:11,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:11,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:11,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:11,970 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:11,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404911067] [2020-10-28 14:30:11,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:11,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:30:11,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218084083] [2020-10-28 14:30:11,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:30:11,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:11,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:30:11,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:30:11,972 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand 10 states. [2020-10-28 14:30:12,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:12,685 INFO L93 Difference]: Finished difference Result 127 states and 143 transitions. [2020-10-28 14:30:12,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:30:12,689 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-10-28 14:30:12,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:12,690 INFO L225 Difference]: With dead ends: 127 [2020-10-28 14:30:12,691 INFO L226 Difference]: Without dead ends: 123 [2020-10-28 14:30:12,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:30:12,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-28 14:30:12,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 101. [2020-10-28 14:30:12,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-28 14:30:12,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2020-10-28 14:30:12,702 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 45 [2020-10-28 14:30:12,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:12,704 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2020-10-28 14:30:12,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:30:12,704 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2020-10-28 14:30:12,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 14:30:12,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:12,705 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] [2020-10-28 14:30:12,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 14:30:12,705 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:12,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:12,705 INFO L82 PathProgramCache]: Analyzing trace with hash -771970409, now seen corresponding path program 1 times [2020-10-28 14:30:12,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:12,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781968848] [2020-10-28 14:30:12,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:12,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:12,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:12,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:13,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:14,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:14,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 14:30:14,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:30:14,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1911 [2020-10-28 14:30:14,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:14,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:14,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:30:14,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 14:30:14,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 14:30:14,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:14,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:14,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:14,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:14,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:14,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:14,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:14,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:14,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:14,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:14,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:14,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:14,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:14,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:14,760 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 14:30:14,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781968848] [2020-10-28 14:30:14,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:30:14,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:30:14,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268942741] [2020-10-28 14:30:14,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:30:14,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:14,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:30:14,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:30:14,762 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand 6 states. [2020-10-28 14:30:15,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:15,008 INFO L93 Difference]: Finished difference Result 118 states and 131 transitions. [2020-10-28 14:30:15,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:30:15,008 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-28 14:30:15,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:15,009 INFO L225 Difference]: With dead ends: 118 [2020-10-28 14:30:15,010 INFO L226 Difference]: Without dead ends: 104 [2020-10-28 14:30:15,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:30:15,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-28 14:30:15,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2020-10-28 14:30:15,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-28 14:30:15,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2020-10-28 14:30:15,020 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 45 [2020-10-28 14:30:15,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:15,021 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2020-10-28 14:30:15,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:30:15,021 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2020-10-28 14:30:15,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 14:30:15,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:15,023 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:15,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 14:30:15,023 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:15,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:15,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1378991867, now seen corresponding path program 1 times [2020-10-28 14:30:15,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:15,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598112430] [2020-10-28 14:30:15,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:15,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:15,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:15,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:16,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:16,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 14:30:16,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:30:16,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1343 [2020-10-28 14:30:16,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:16,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:16,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:30:16,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:16,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 14:30:16,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:16,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:16,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:16,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:16,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:16,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:16,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:16,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:16,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:16,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:16,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:16,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:16,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:16,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:16,650 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:16,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598112430] [2020-10-28 14:30:16,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:16,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:30:16,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786819076] [2020-10-28 14:30:16,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:30:16,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:16,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:30:16,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:30:16,653 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand 10 states. [2020-10-28 14:30:17,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:17,385 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2020-10-28 14:30:17,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:30:17,386 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-10-28 14:30:17,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:17,387 INFO L225 Difference]: With dead ends: 101 [2020-10-28 14:30:17,388 INFO L226 Difference]: Without dead ends: 97 [2020-10-28 14:30:17,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:30:17,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-28 14:30:17,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 55. [2020-10-28 14:30:17,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-28 14:30:17,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2020-10-28 14:30:17,394 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 45 [2020-10-28 14:30:17,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:17,395 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2020-10-28 14:30:17,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:30:17,395 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2020-10-28 14:30:17,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 14:30:17,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:17,395 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:17,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 14:30:17,396 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:17,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:17,396 INFO L82 PathProgramCache]: Analyzing trace with hash 714678261, now seen corresponding path program 1 times [2020-10-28 14:30:17,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:17,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926059998] [2020-10-28 14:30:17,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:17,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:17,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:17,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:18,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:18,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 14:30:18,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:30:18,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 916 [2020-10-28 14:30:18,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:18,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:18,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:30:18,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:18,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 14:30:18,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:18,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:18,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:18,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:18,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:18,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:18,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:18,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:30:18,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:18,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:18,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:18,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:18,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:18,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:30:18,722 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:18,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926059998] [2020-10-28 14:30:18,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:18,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:30:18,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097388595] [2020-10-28 14:30:18,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:30:18,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:18,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:30:18,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:30:18,736 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 11 states. [2020-10-28 14:30:19,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:19,877 INFO L93 Difference]: Finished difference Result 121 states and 135 transitions. [2020-10-28 14:30:19,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:30:19,878 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-10-28 14:30:19,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:19,879 INFO L225 Difference]: With dead ends: 121 [2020-10-28 14:30:19,879 INFO L226 Difference]: Without dead ends: 117 [2020-10-28 14:30:19,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:30:19,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-28 14:30:19,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-10-28 14:30:19,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-28 14:30:19,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2020-10-28 14:30:19,894 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 48 [2020-10-28 14:30:19,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:19,895 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2020-10-28 14:30:19,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:30:19,895 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2020-10-28 14:30:19,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 14:30:19,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:19,896 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:19,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 14:30:19,896 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:19,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:19,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1429326759, now seen corresponding path program 4 times [2020-10-28 14:30:19,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:19,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237215661] [2020-10-28 14:30:19,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:19,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:19,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:20,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:20,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 14:30:20,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:20,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 390 [2020-10-28 14:30:20,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:20,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:20,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:30:20,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:20,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 14:30:20,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:20,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:20,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:20,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:20,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:20,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:20,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:20,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:20,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:20,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:20,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:20,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:20,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:20,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:20,697 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:20,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237215661] [2020-10-28 14:30:20,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:20,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:30:20,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721686863] [2020-10-28 14:30:20,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:30:20,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:20,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:30:20,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:30:20,699 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand 11 states. [2020-10-28 14:30:21,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:21,610 INFO L93 Difference]: Finished difference Result 119 states and 134 transitions. [2020-10-28 14:30:21,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:30:21,612 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-10-28 14:30:21,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:21,613 INFO L225 Difference]: With dead ends: 119 [2020-10-28 14:30:21,613 INFO L226 Difference]: Without dead ends: 106 [2020-10-28 14:30:21,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:30:21,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-28 14:30:21,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2020-10-28 14:30:21,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-28 14:30:21,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 103 transitions. [2020-10-28 14:30:21,622 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 103 transitions. Word has length 48 [2020-10-28 14:30:21,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:21,623 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 103 transitions. [2020-10-28 14:30:21,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:30:21,623 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 103 transitions. [2020-10-28 14:30:21,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 14:30:21,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:21,624 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:21,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 14:30:21,624 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:21,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:21,624 INFO L82 PathProgramCache]: Analyzing trace with hash 2100881655, now seen corresponding path program 1 times [2020-10-28 14:30:21,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:21,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701396812] [2020-10-28 14:30:21,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:21,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:21,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:22,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:22,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 14:30:22,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:22,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 519 [2020-10-28 14:30:22,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:22,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:22,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:30:22,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:22,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 14:30:22,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:22,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:22,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:22,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:22,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:22,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:22,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:22,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:22,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:22,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:22,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:22,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:22,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:22,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:22,500 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:22,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701396812] [2020-10-28 14:30:22,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:22,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:30:22,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184736193] [2020-10-28 14:30:22,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:30:22,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:22,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:30:22,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:30:22,502 INFO L87 Difference]: Start difference. First operand 94 states and 103 transitions. Second operand 11 states. [2020-10-28 14:30:23,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:23,553 INFO L93 Difference]: Finished difference Result 141 states and 158 transitions. [2020-10-28 14:30:23,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:30:23,554 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-10-28 14:30:23,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:23,555 INFO L225 Difference]: With dead ends: 141 [2020-10-28 14:30:23,555 INFO L226 Difference]: Without dead ends: 123 [2020-10-28 14:30:23,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:30:23,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-28 14:30:23,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 107. [2020-10-28 14:30:23,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-28 14:30:23,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 117 transitions. [2020-10-28 14:30:23,567 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 117 transitions. Word has length 48 [2020-10-28 14:30:23,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:23,567 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 117 transitions. [2020-10-28 14:30:23,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:30:23,567 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 117 transitions. [2020-10-28 14:30:23,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 14:30:23,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:23,568 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:23,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 14:30:23,569 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:23,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:23,569 INFO L82 PathProgramCache]: Analyzing trace with hash -43123365, now seen corresponding path program 2 times [2020-10-28 14:30:23,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:23,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971418704] [2020-10-28 14:30:23,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:23,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:23,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:24,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:24,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 14:30:24,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:24,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 561 [2020-10-28 14:30:24,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:24,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:24,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:30:24,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:24,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 14:30:24,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:24,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:24,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:24,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:24,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:24,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:24,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:24,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:30:24,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:24,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:24,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:24,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:24,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:24,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:24,415 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:24,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971418704] [2020-10-28 14:30:24,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:24,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:30:24,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864916254] [2020-10-28 14:30:24,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:30:24,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:24,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:30:24,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:30:24,417 INFO L87 Difference]: Start difference. First operand 107 states and 117 transitions. Second operand 11 states. [2020-10-28 14:30:25,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:25,674 INFO L93 Difference]: Finished difference Result 163 states and 182 transitions. [2020-10-28 14:30:25,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:30:25,674 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-10-28 14:30:25,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:25,676 INFO L225 Difference]: With dead ends: 163 [2020-10-28 14:30:25,676 INFO L226 Difference]: Without dead ends: 159 [2020-10-28 14:30:25,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:30:25,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-28 14:30:25,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 126. [2020-10-28 14:30:25,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-28 14:30:25,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 137 transitions. [2020-10-28 14:30:25,687 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 137 transitions. Word has length 48 [2020-10-28 14:30:25,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:25,688 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 137 transitions. [2020-10-28 14:30:25,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:30:25,688 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 137 transitions. [2020-10-28 14:30:25,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 14:30:25,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:25,689 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:25,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 14:30:25,689 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:25,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:25,689 INFO L82 PathProgramCache]: Analyzing trace with hash -657129037, now seen corresponding path program 2 times [2020-10-28 14:30:25,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:25,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513495074] [2020-10-28 14:30:25,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:25,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:25,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:26,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:26,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 14:30:26,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:26,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 494 [2020-10-28 14:30:26,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:26,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:26,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:30:26,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:26,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 14:30:26,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:26,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:26,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:26,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:26,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:26,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:26,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:26,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:26,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:26,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:26,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:26,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:26,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:26,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:26,629 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:26,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513495074] [2020-10-28 14:30:26,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:26,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:30:26,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161267380] [2020-10-28 14:30:26,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:30:26,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:26,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:30:26,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:30:26,633 INFO L87 Difference]: Start difference. First operand 126 states and 137 transitions. Second operand 12 states. [2020-10-28 14:30:28,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:28,309 INFO L93 Difference]: Finished difference Result 176 states and 194 transitions. [2020-10-28 14:30:28,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:30:28,310 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-10-28 14:30:28,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:28,311 INFO L225 Difference]: With dead ends: 176 [2020-10-28 14:30:28,312 INFO L226 Difference]: Without dead ends: 172 [2020-10-28 14:30:28,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:30:28,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-28 14:30:28,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 152. [2020-10-28 14:30:28,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-28 14:30:28,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 166 transitions. [2020-10-28 14:30:28,325 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 166 transitions. Word has length 48 [2020-10-28 14:30:28,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:28,326 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 166 transitions. [2020-10-28 14:30:28,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:30:28,326 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 166 transitions. [2020-10-28 14:30:28,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 14:30:28,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:28,327 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:28,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 14:30:28,327 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:28,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:28,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1493833239, now seen corresponding path program 3 times [2020-10-28 14:30:28,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:28,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583356196] [2020-10-28 14:30:28,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:28,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:28,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:28,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:28,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:30,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:30,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 14:30:30,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:30:30,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2491 [2020-10-28 14:30:30,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:30,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:30,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:30:30,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:30,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 14:30:30,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:31,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:31,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:31,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:31,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:31,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:31,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:31,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:31,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:31,104 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:31,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:31,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:31,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:31,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:31,128 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:31,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583356196] [2020-10-28 14:30:31,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:31,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:30:31,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159223090] [2020-10-28 14:30:31,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:30:31,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:31,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:30:31,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:30:31,130 INFO L87 Difference]: Start difference. First operand 152 states and 166 transitions. Second operand 12 states. [2020-10-28 14:30:32,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:32,390 INFO L93 Difference]: Finished difference Result 214 states and 237 transitions. [2020-10-28 14:30:32,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:30:32,394 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-10-28 14:30:32,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:32,396 INFO L225 Difference]: With dead ends: 214 [2020-10-28 14:30:32,396 INFO L226 Difference]: Without dead ends: 210 [2020-10-28 14:30:32,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:30:32,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-28 14:30:32,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 153. [2020-10-28 14:30:32,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-28 14:30:32,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 168 transitions. [2020-10-28 14:30:32,417 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 168 transitions. Word has length 48 [2020-10-28 14:30:32,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:32,417 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 168 transitions. [2020-10-28 14:30:32,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:30:32,417 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 168 transitions. [2020-10-28 14:30:32,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 14:30:32,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:32,418 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:32,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 14:30:32,418 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:32,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:32,419 INFO L82 PathProgramCache]: Analyzing trace with hash 729074357, now seen corresponding path program 2 times [2020-10-28 14:30:32,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:32,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965831221] [2020-10-28 14:30:32,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:32,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:32,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:33,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:33,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 14:30:33,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:33,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 668 [2020-10-28 14:30:33,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:33,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:33,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:30:33,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:33,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 14:30:33,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:33,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:33,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:33,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:33,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:33,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:33,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:33,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:33,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:33,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:33,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:33,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:33,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:33,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:33,537 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:33,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965831221] [2020-10-28 14:30:33,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:33,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:30:33,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446298063] [2020-10-28 14:30:33,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:30:33,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:33,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:30:33,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:30:33,539 INFO L87 Difference]: Start difference. First operand 153 states and 168 transitions. Second operand 12 states. [2020-10-28 14:30:34,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:34,703 INFO L93 Difference]: Finished difference Result 202 states and 225 transitions. [2020-10-28 14:30:34,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:30:34,704 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-10-28 14:30:34,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:34,705 INFO L225 Difference]: With dead ends: 202 [2020-10-28 14:30:34,705 INFO L226 Difference]: Without dead ends: 198 [2020-10-28 14:30:34,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:30:34,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-28 14:30:34,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 174. [2020-10-28 14:30:34,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-28 14:30:34,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 191 transitions. [2020-10-28 14:30:34,723 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 191 transitions. Word has length 48 [2020-10-28 14:30:34,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:34,723 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 191 transitions. [2020-10-28 14:30:34,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:30:34,723 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 191 transitions. [2020-10-28 14:30:34,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 14:30:34,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:34,724 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:34,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 14:30:34,725 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:34,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:34,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1414930663, now seen corresponding path program 4 times [2020-10-28 14:30:34,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:34,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941041003] [2020-10-28 14:30:34,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:34,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:35,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:35,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:38,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:38,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 14:30:38,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:30:38,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3249 [2020-10-28 14:30:38,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:38,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:38,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:30:38,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:38,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 14:30:38,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:38,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:38,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:38,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:38,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:38,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:38,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:38,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:30:38,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:38,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:38,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:38,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:38,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:38,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:38,322 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:38,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941041003] [2020-10-28 14:30:38,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:38,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:30:38,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089892037] [2020-10-28 14:30:38,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:30:38,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:38,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:30:38,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:30:38,326 INFO L87 Difference]: Start difference. First operand 174 states and 191 transitions. Second operand 12 states. [2020-10-28 14:30:39,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:39,748 INFO L93 Difference]: Finished difference Result 218 states and 243 transitions. [2020-10-28 14:30:39,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:30:39,748 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-10-28 14:30:39,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:39,750 INFO L225 Difference]: With dead ends: 218 [2020-10-28 14:30:39,750 INFO L226 Difference]: Without dead ends: 214 [2020-10-28 14:30:39,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:30:39,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-28 14:30:39,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 141. [2020-10-28 14:30:39,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-28 14:30:39,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 155 transitions. [2020-10-28 14:30:39,764 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 155 transitions. Word has length 48 [2020-10-28 14:30:39,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:39,764 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 155 transitions. [2020-10-28 14:30:39,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:30:39,764 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 155 transitions. [2020-10-28 14:30:39,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 14:30:39,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:39,766 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:39,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 14:30:39,766 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:39,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:39,767 INFO L82 PathProgramCache]: Analyzing trace with hash -995351747, now seen corresponding path program 5 times [2020-10-28 14:30:39,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:39,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685360627] [2020-10-28 14:30:39,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:39,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:39,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:40,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:40,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 14:30:40,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:40,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 372 [2020-10-28 14:30:40,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:40,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:40,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:30:40,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:40,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 14:30:40,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:40,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:40,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:40,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:40,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:40,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:40,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:40,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:40,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:40,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:40,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:40,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:40,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:40,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:40,428 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:40,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685360627] [2020-10-28 14:30:40,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:40,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:30:40,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545254983] [2020-10-28 14:30:40,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:30:40,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:40,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:30:40,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:30:40,430 INFO L87 Difference]: Start difference. First operand 141 states and 155 transitions. Second operand 11 states. [2020-10-28 14:30:41,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:41,285 INFO L93 Difference]: Finished difference Result 156 states and 172 transitions. [2020-10-28 14:30:41,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:30:41,286 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2020-10-28 14:30:41,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:41,287 INFO L225 Difference]: With dead ends: 156 [2020-10-28 14:30:41,287 INFO L226 Difference]: Without dead ends: 127 [2020-10-28 14:30:41,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:30:41,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-28 14:30:41,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-10-28 14:30:41,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-28 14:30:41,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 140 transitions. [2020-10-28 14:30:41,299 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 140 transitions. Word has length 51 [2020-10-28 14:30:41,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:41,299 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 140 transitions. [2020-10-28 14:30:41,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:30:41,299 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 140 transitions. [2020-10-28 14:30:41,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 14:30:41,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:41,300 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:41,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 14:30:41,301 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:41,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:41,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1423412887, now seen corresponding path program 3 times [2020-10-28 14:30:41,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:41,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141312725] [2020-10-28 14:30:41,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:41,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:41,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:41,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:41,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 14:30:41,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:41,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 555 [2020-10-28 14:30:41,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:41,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:41,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:30:41,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:41,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 14:30:41,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:42,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:42,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:42,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:42,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:42,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:42,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:42,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:30:42,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:42,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:42,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:42,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:42,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:42,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:42,126 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:42,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141312725] [2020-10-28 14:30:42,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:42,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:30:42,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929252414] [2020-10-28 14:30:42,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:30:42,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:42,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:30:42,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:30:42,128 INFO L87 Difference]: Start difference. First operand 127 states and 140 transitions. Second operand 12 states. [2020-10-28 14:30:43,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:43,210 INFO L93 Difference]: Finished difference Result 174 states and 193 transitions. [2020-10-28 14:30:43,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:30:43,211 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-28 14:30:43,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:43,212 INFO L225 Difference]: With dead ends: 174 [2020-10-28 14:30:43,212 INFO L226 Difference]: Without dead ends: 170 [2020-10-28 14:30:43,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:30:43,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-28 14:30:43,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 151. [2020-10-28 14:30:43,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-28 14:30:43,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 166 transitions. [2020-10-28 14:30:43,224 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 166 transitions. Word has length 51 [2020-10-28 14:30:43,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:43,225 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 166 transitions. [2020-10-28 14:30:43,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:30:43,225 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 166 transitions. [2020-10-28 14:30:43,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 14:30:43,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:43,226 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 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] [2020-10-28 14:30:43,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 14:30:43,226 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:43,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:43,227 INFO L82 PathProgramCache]: Analyzing trace with hash -720592133, now seen corresponding path program 4 times [2020-10-28 14:30:43,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:43,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18337429] [2020-10-28 14:30:43,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:43,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:43,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:43,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:44,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:44,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 14:30:44,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:30:44,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1428 [2020-10-28 14:30:44,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:44,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:44,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:30:44,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:44,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 14:30:44,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:45,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:45,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:45,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:45,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:45,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:45,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:45,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:30:45,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:45,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:45,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:45,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:45,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:45,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:45,054 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 14:30:45,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18337429] [2020-10-28 14:30:45,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:45,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:30:45,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738487165] [2020-10-28 14:30:45,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:30:45,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:45,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:30:45,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:30:45,056 INFO L87 Difference]: Start difference. First operand 151 states and 166 transitions. Second operand 12 states. [2020-10-28 14:30:46,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:46,271 INFO L93 Difference]: Finished difference Result 183 states and 204 transitions. [2020-10-28 14:30:46,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:30:46,272 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-28 14:30:46,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:46,273 INFO L225 Difference]: With dead ends: 183 [2020-10-28 14:30:46,273 INFO L226 Difference]: Without dead ends: 170 [2020-10-28 14:30:46,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:30:46,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-28 14:30:46,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 154. [2020-10-28 14:30:46,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-28 14:30:46,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 169 transitions. [2020-10-28 14:30:46,286 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 169 transitions. Word has length 51 [2020-10-28 14:30:46,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:46,286 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 169 transitions. [2020-10-28 14:30:46,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:30:46,286 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 169 transitions. [2020-10-28 14:30:46,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 14:30:46,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:46,287 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:46,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 14:30:46,288 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:46,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:46,288 INFO L82 PathProgramCache]: Analyzing trace with hash 251259995, now seen corresponding path program 4 times [2020-10-28 14:30:46,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:46,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264545077] [2020-10-28 14:30:46,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:46,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:46,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:46,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:46,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:48,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:48,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 14:30:48,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:30:48,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1716 [2020-10-28 14:30:48,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:48,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:48,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:30:48,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:48,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 14:30:48,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:48,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:48,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:48,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:48,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:48,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:48,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:48,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:48,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:48,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:48,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:48,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:48,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:48,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:48,443 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:48,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264545077] [2020-10-28 14:30:48,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:48,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:30:48,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238526964] [2020-10-28 14:30:48,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:30:48,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:48,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:30:48,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:30:48,445 INFO L87 Difference]: Start difference. First operand 154 states and 169 transitions. Second operand 13 states. [2020-10-28 14:30:49,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:49,990 INFO L93 Difference]: Finished difference Result 232 states and 256 transitions. [2020-10-28 14:30:49,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:30:49,991 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-10-28 14:30:49,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:49,993 INFO L225 Difference]: With dead ends: 232 [2020-10-28 14:30:49,993 INFO L226 Difference]: Without dead ends: 228 [2020-10-28 14:30:49,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:30:49,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-28 14:30:50,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 200. [2020-10-28 14:30:50,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-28 14:30:50,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 220 transitions. [2020-10-28 14:30:50,009 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 220 transitions. Word has length 51 [2020-10-28 14:30:50,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:50,009 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 220 transitions. [2020-10-28 14:30:50,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:30:50,009 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 220 transitions. [2020-10-28 14:30:50,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 14:30:50,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:50,010 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 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] [2020-10-28 14:30:50,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 14:30:50,011 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:50,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:50,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1892745025, now seen corresponding path program 5 times [2020-10-28 14:30:50,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:50,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163896385] [2020-10-28 14:30:50,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:50,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:50,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:50,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:51,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:51,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 14:30:51,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:30:51,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1284 [2020-10-28 14:30:51,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:51,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:51,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:30:51,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:51,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 14:30:51,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:51,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:51,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:51,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:51,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:51,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:51,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:51,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:30:51,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:51,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:51,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:51,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:51,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:51,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:51,790 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 14:30:51,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163896385] [2020-10-28 14:30:51,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:51,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:30:51,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348110672] [2020-10-28 14:30:51,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:30:51,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:51,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:30:51,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:30:51,791 INFO L87 Difference]: Start difference. First operand 200 states and 220 transitions. Second operand 13 states. [2020-10-28 14:30:53,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:53,073 INFO L93 Difference]: Finished difference Result 248 states and 275 transitions. [2020-10-28 14:30:53,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:30:53,074 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-10-28 14:30:53,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:53,075 INFO L225 Difference]: With dead ends: 248 [2020-10-28 14:30:53,075 INFO L226 Difference]: Without dead ends: 235 [2020-10-28 14:30:53,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:30:53,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-28 14:30:53,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 181. [2020-10-28 14:30:53,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-28 14:30:53,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 199 transitions. [2020-10-28 14:30:53,089 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 199 transitions. Word has length 51 [2020-10-28 14:30:53,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:53,090 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 199 transitions. [2020-10-28 14:30:53,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:30:53,090 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 199 transitions. [2020-10-28 14:30:53,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 14:30:53,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:53,091 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:53,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 14:30:53,091 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:53,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:53,091 INFO L82 PathProgramCache]: Analyzing trace with hash 526019609, now seen corresponding path program 3 times [2020-10-28 14:30:53,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:53,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078747979] [2020-10-28 14:30:53,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:53,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:53,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:53,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:55,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:55,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 14:30:55,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:30:55,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1911 [2020-10-28 14:30:55,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:55,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:55,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:30:55,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:55,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 14:30:55,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:55,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:55,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:55,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:55,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:55,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:55,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:55,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:30:55,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:55,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:55,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:55,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:55,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:55,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:55,625 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:55,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078747979] [2020-10-28 14:30:55,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:55,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:30:55,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609718708] [2020-10-28 14:30:55,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:30:55,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:55,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:30:55,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:30:55,627 INFO L87 Difference]: Start difference. First operand 181 states and 199 transitions. Second operand 12 states. [2020-10-28 14:30:56,020 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2020-10-28 14:30:56,668 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-10-28 14:30:57,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:57,531 INFO L93 Difference]: Finished difference Result 225 states and 251 transitions. [2020-10-28 14:30:57,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:30:57,531 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-28 14:30:57,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:57,532 INFO L225 Difference]: With dead ends: 225 [2020-10-28 14:30:57,532 INFO L226 Difference]: Without dead ends: 207 [2020-10-28 14:30:57,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:30:57,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-28 14:30:57,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 179. [2020-10-28 14:30:57,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-28 14:30:57,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 196 transitions. [2020-10-28 14:30:57,548 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 196 transitions. Word has length 51 [2020-10-28 14:30:57,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:57,549 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 196 transitions. [2020-10-28 14:30:57,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:30:57,549 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 196 transitions. [2020-10-28 14:30:57,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 14:30:57,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:57,550 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:57,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 14:30:57,550 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:57,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:57,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1617985411, now seen corresponding path program 5 times [2020-10-28 14:30:57,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:57,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249822949] [2020-10-28 14:30:57,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:57,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:57,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:57,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:59,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:59,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 14:30:59,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:30:59,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1899 [2020-10-28 14:30:59,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:59,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:59,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:30:59,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:59,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 14:30:59,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:59,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:59,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:59,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:59,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:59,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:59,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:59,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:30:59,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:59,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:59,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:59,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:59,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:59,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:59,845 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 14:30:59,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249822949] [2020-10-28 14:30:59,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:59,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:30:59,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170620358] [2020-10-28 14:30:59,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:30:59,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:59,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:30:59,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:30:59,851 INFO L87 Difference]: Start difference. First operand 179 states and 196 transitions. Second operand 13 states. [2020-10-28 14:31:01,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:01,805 INFO L93 Difference]: Finished difference Result 253 states and 282 transitions. [2020-10-28 14:31:01,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:31:01,806 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-10-28 14:31:01,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:01,808 INFO L225 Difference]: With dead ends: 253 [2020-10-28 14:31:01,808 INFO L226 Difference]: Without dead ends: 249 [2020-10-28 14:31:01,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:31:01,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-28 14:31:01,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 208. [2020-10-28 14:31:01,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-28 14:31:01,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 227 transitions. [2020-10-28 14:31:01,826 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 227 transitions. Word has length 51 [2020-10-28 14:31:01,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:01,826 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 227 transitions. [2020-10-28 14:31:01,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:31:01,826 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 227 transitions. [2020-10-28 14:31:01,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 14:31:01,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:01,828 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 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] [2020-10-28 14:31:01,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 14:31:01,828 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:01,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:01,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1141335717, now seen corresponding path program 6 times [2020-10-28 14:31:01,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:01,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655417658] [2020-10-28 14:31:01,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:01,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:01,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:02,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:03,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:03,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 14:31:03,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:31:03,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1409 [2020-10-28 14:31:03,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:03,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:03,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:31:03,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:03,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 14:31:03,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:03,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:03,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:03,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:03,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:03,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:03,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:03,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:31:03,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:03,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:03,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:03,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:03,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:03,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:03,604 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:03,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655417658] [2020-10-28 14:31:03,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:03,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:31:03,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84756163] [2020-10-28 14:31:03,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:31:03,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:03,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:31:03,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:31:03,606 INFO L87 Difference]: Start difference. First operand 208 states and 227 transitions. Second operand 12 states. [2020-10-28 14:31:05,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:05,051 INFO L93 Difference]: Finished difference Result 255 states and 278 transitions. [2020-10-28 14:31:05,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:31:05,052 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2020-10-28 14:31:05,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:05,054 INFO L225 Difference]: With dead ends: 255 [2020-10-28 14:31:05,054 INFO L226 Difference]: Without dead ends: 218 [2020-10-28 14:31:05,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:31:05,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-28 14:31:05,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2020-10-28 14:31:05,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-10-28 14:31:05,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 237 transitions. [2020-10-28 14:31:05,071 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 237 transitions. Word has length 54 [2020-10-28 14:31:05,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:05,072 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 237 transitions. [2020-10-28 14:31:05,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:31:05,072 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 237 transitions. [2020-10-28 14:31:05,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 14:31:05,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:05,073 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 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] [2020-10-28 14:31:05,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 14:31:05,073 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:05,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:05,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1630942487, now seen corresponding path program 7 times [2020-10-28 14:31:05,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:05,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464693080] [2020-10-28 14:31:05,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:05,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:05,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:05,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:06,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:06,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 14:31:06,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:31:06,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1116 [2020-10-28 14:31:06,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:06,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:06,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:31:06,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:06,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 14:31:06,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:06,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:06,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:06,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:06,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:06,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:06,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:06,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:06,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:06,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:06,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:06,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:06,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:06,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:06,744 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:06,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464693080] [2020-10-28 14:31:06,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:06,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:31:06,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97742444] [2020-10-28 14:31:06,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:31:06,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:06,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:31:06,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:31:06,746 INFO L87 Difference]: Start difference. First operand 218 states and 237 transitions. Second operand 13 states. [2020-10-28 14:31:08,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:08,239 INFO L93 Difference]: Finished difference Result 234 states and 255 transitions. [2020-10-28 14:31:08,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:31:08,240 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 54 [2020-10-28 14:31:08,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:08,242 INFO L225 Difference]: With dead ends: 234 [2020-10-28 14:31:08,242 INFO L226 Difference]: Without dead ends: 178 [2020-10-28 14:31:08,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:31:08,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-28 14:31:08,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 168. [2020-10-28 14:31:08,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-28 14:31:08,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 183 transitions. [2020-10-28 14:31:08,255 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 183 transitions. Word has length 54 [2020-10-28 14:31:08,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:08,255 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 183 transitions. [2020-10-28 14:31:08,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:31:08,255 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 183 transitions. [2020-10-28 14:31:08,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 14:31:08,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:08,256 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:08,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 14:31:08,257 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:08,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:08,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1364025291, now seen corresponding path program 4 times [2020-10-28 14:31:08,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:08,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717001639] [2020-10-28 14:31:08,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:08,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:08,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:08,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:09,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:09,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 14:31:09,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:31:09,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1604 [2020-10-28 14:31:09,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:09,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:09,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:31:09,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:09,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 14:31:09,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:10,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:10,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:10,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:10,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:10,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:10,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:10,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:10,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:10,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:10,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:10,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:10,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:10,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:10,440 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 14:31:10,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717001639] [2020-10-28 14:31:10,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:10,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:31:10,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329776030] [2020-10-28 14:31:10,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:31:10,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:10,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:31:10,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:31:10,442 INFO L87 Difference]: Start difference. First operand 168 states and 183 transitions. Second operand 14 states. [2020-10-28 14:31:12,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:12,302 INFO L93 Difference]: Finished difference Result 218 states and 240 transitions. [2020-10-28 14:31:12,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:31:12,302 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-28 14:31:12,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:12,304 INFO L225 Difference]: With dead ends: 218 [2020-10-28 14:31:12,305 INFO L226 Difference]: Without dead ends: 214 [2020-10-28 14:31:12,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:31:12,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-28 14:31:12,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 183. [2020-10-28 14:31:12,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-28 14:31:12,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 200 transitions. [2020-10-28 14:31:12,319 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 200 transitions. Word has length 54 [2020-10-28 14:31:12,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:12,320 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 200 transitions. [2020-10-28 14:31:12,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:31:12,320 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 200 transitions. [2020-10-28 14:31:12,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 14:31:12,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:12,321 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:12,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 14:31:12,321 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:12,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:12,321 INFO L82 PathProgramCache]: Analyzing trace with hash 786936985, now seen corresponding path program 6 times [2020-10-28 14:31:12,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:12,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171410136] [2020-10-28 14:31:12,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:12,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:12,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:12,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:13,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:16,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:16,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 14:31:16,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:31:16,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4273 [2020-10-28 14:31:16,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:16,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:16,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:31:16,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:16,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 14:31:16,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:17,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:17,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:17,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:17,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:17,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:17,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:17,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:31:17,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:17,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:17,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:17,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:17,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:17,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:17,282 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:17,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171410136] [2020-10-28 14:31:17,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:17,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:31:17,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232916342] [2020-10-28 14:31:17,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:31:17,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:17,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:31:17,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:31:17,284 INFO L87 Difference]: Start difference. First operand 183 states and 200 transitions. Second operand 14 states. [2020-10-28 14:31:19,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:19,241 INFO L93 Difference]: Finished difference Result 217 states and 241 transitions. [2020-10-28 14:31:19,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:31:19,242 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-28 14:31:19,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:19,244 INFO L225 Difference]: With dead ends: 217 [2020-10-28 14:31:19,244 INFO L226 Difference]: Without dead ends: 204 [2020-10-28 14:31:19,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:31:19,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-28 14:31:19,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 191. [2020-10-28 14:31:19,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-28 14:31:19,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 209 transitions. [2020-10-28 14:31:19,259 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 209 transitions. Word has length 54 [2020-10-28 14:31:19,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:19,259 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 209 transitions. [2020-10-28 14:31:19,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:31:19,259 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 209 transitions. [2020-10-28 14:31:19,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 14:31:19,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:19,260 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:19,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 14:31:19,260 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:19,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:19,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1480571645, now seen corresponding path program 7 times [2020-10-28 14:31:19,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:19,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352388777] [2020-10-28 14:31:19,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:19,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:19,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:19,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:19,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:23,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:23,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 14:31:23,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:31:23,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4046 [2020-10-28 14:31:23,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:23,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:23,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:31:23,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:23,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 14:31:23,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:23,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:23,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:23,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:23,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:23,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:23,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:23,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:31:23,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:23,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:23,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:23,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:23,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:23,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:23,746 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:23,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352388777] [2020-10-28 14:31:23,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:23,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:31:23,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638160146] [2020-10-28 14:31:23,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:31:23,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:23,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:31:23,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:31:23,748 INFO L87 Difference]: Start difference. First operand 191 states and 209 transitions. Second operand 14 states. [2020-10-28 14:31:25,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:25,671 INFO L93 Difference]: Finished difference Result 210 states and 232 transitions. [2020-10-28 14:31:25,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:31:25,671 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2020-10-28 14:31:25,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:25,673 INFO L225 Difference]: With dead ends: 210 [2020-10-28 14:31:25,673 INFO L226 Difference]: Without dead ends: 164 [2020-10-28 14:31:25,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:31:25,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-28 14:31:25,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 151. [2020-10-28 14:31:25,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-28 14:31:25,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 164 transitions. [2020-10-28 14:31:25,685 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 164 transitions. Word has length 57 [2020-10-28 14:31:25,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:25,685 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 164 transitions. [2020-10-28 14:31:25,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:31:25,685 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 164 transitions. [2020-10-28 14:31:25,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 14:31:25,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:25,686 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:25,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 14:31:25,686 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:25,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:25,686 INFO L82 PathProgramCache]: Analyzing trace with hash 672649650, now seen corresponding path program 5 times [2020-10-28 14:31:25,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:25,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577355951] [2020-10-28 14:31:25,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:25,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:25,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:26,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:26,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 14:31:26,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:26,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 682 [2020-10-28 14:31:26,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:26,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:26,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:31:26,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:26,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 14:31:26,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:26,731 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-10-28 14:31:26,857 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-10-28 14:31:27,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:27,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:27,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:27,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:27,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:27,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:27,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:27,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:27,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:27,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:27,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:27,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:27,246 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:27,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577355951] [2020-10-28 14:31:27,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:27,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:31:27,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519043687] [2020-10-28 14:31:27,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:31:27,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:27,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:31:27,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:31:27,248 INFO L87 Difference]: Start difference. First operand 151 states and 164 transitions. Second operand 13 states. [2020-10-28 14:31:29,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:29,076 INFO L93 Difference]: Finished difference Result 228 states and 249 transitions. [2020-10-28 14:31:29,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:31:29,077 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 59 [2020-10-28 14:31:29,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:29,079 INFO L225 Difference]: With dead ends: 228 [2020-10-28 14:31:29,079 INFO L226 Difference]: Without dead ends: 224 [2020-10-28 14:31:29,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:31:29,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-28 14:31:29,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 187. [2020-10-28 14:31:29,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-28 14:31:29,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 203 transitions. [2020-10-28 14:31:29,095 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 203 transitions. Word has length 59 [2020-10-28 14:31:29,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:29,095 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 203 transitions. [2020-10-28 14:31:29,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:31:29,095 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 203 transitions. [2020-10-28 14:31:29,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 14:31:29,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:29,096 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:29,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 14:31:29,096 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:29,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:29,097 INFO L82 PathProgramCache]: Analyzing trace with hash 2058853044, now seen corresponding path program 6 times [2020-10-28 14:31:29,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:29,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92069721] [2020-10-28 14:31:29,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:29,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:29,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:30,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:30,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 14:31:30,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:30,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1329 [2020-10-28 14:31:30,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:30,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:30,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:31:30,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:30,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 14:31:30,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:31,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:31,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:31,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:31,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:31,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:31,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:31,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:31,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:31,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:31,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:31,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:31,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:31,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:31,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92069721] [2020-10-28 14:31:31,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:31,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:31:31,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274931944] [2020-10-28 14:31:31,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:31:31,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:31,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:31:31,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:31:31,168 INFO L87 Difference]: Start difference. First operand 187 states and 203 transitions. Second operand 13 states. [2020-10-28 14:31:32,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:32,593 INFO L93 Difference]: Finished difference Result 222 states and 243 transitions. [2020-10-28 14:31:32,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:31:32,594 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 59 [2020-10-28 14:31:32,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:32,595 INFO L225 Difference]: With dead ends: 222 [2020-10-28 14:31:32,595 INFO L226 Difference]: Without dead ends: 218 [2020-10-28 14:31:32,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:31:32,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-28 14:31:32,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 155. [2020-10-28 14:31:32,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-28 14:31:32,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 168 transitions. [2020-10-28 14:31:32,610 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 168 transitions. Word has length 59 [2020-10-28 14:31:32,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:32,610 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 168 transitions. [2020-10-28 14:31:32,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:31:32,611 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 168 transitions. [2020-10-28 14:31:32,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 14:31:32,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:32,611 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 14:31:32,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 14:31:32,612 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:32,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:32,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1691473284, now seen corresponding path program 7 times [2020-10-28 14:31:32,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:32,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670816517] [2020-10-28 14:31:32,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:32,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:32,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:33,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:33,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 14:31:33,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:33,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 798 [2020-10-28 14:31:33,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:33,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:33,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:31:33,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:33,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 14:31:33,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:33,777 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2020-10-28 14:31:33,909 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2020-10-28 14:31:34,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:34,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:34,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:34,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:34,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:34,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:34,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:31:34,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:34,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:34,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:34,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:34,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:34,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:34,333 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:34,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670816517] [2020-10-28 14:31:34,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:34,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:31:34,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707989141] [2020-10-28 14:31:34,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:31:34,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:34,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:31:34,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:31:34,336 INFO L87 Difference]: Start difference. First operand 155 states and 168 transitions. Second operand 13 states. [2020-10-28 14:31:34,910 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-28 14:31:35,844 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-28 14:31:36,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:36,651 INFO L93 Difference]: Finished difference Result 248 states and 271 transitions. [2020-10-28 14:31:36,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:31:36,652 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 62 [2020-10-28 14:31:36,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:36,654 INFO L225 Difference]: With dead ends: 248 [2020-10-28 14:31:36,654 INFO L226 Difference]: Without dead ends: 216 [2020-10-28 14:31:36,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:31:36,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-28 14:31:36,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 162. [2020-10-28 14:31:36,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-28 14:31:36,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 176 transitions. [2020-10-28 14:31:36,668 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 176 transitions. Word has length 62 [2020-10-28 14:31:36,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:36,668 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 176 transitions. [2020-10-28 14:31:36,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:31:36,669 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 176 transitions. [2020-10-28 14:31:36,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 14:31:36,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:36,669 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 14:31:36,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 14:31:36,670 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:36,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:36,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1431341120, now seen corresponding path program 8 times [2020-10-28 14:31:36,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:36,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038426643] [2020-10-28 14:31:36,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:36,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:36,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:37,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:37,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 14:31:37,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:37,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 731 [2020-10-28 14:31:37,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:37,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:37,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:31:37,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:37,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 14:31:37,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:37,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:38,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:38,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:38,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:38,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:38,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:31:38,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:38,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:38,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:38,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:38,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:38,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:38,037 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:38,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038426643] [2020-10-28 14:31:38,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:38,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:31:38,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453425372] [2020-10-28 14:31:38,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:31:38,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:38,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:31:38,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:31:38,039 INFO L87 Difference]: Start difference. First operand 162 states and 176 transitions. Second operand 14 states. [2020-10-28 14:31:40,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:40,227 INFO L93 Difference]: Finished difference Result 230 states and 251 transitions. [2020-10-28 14:31:40,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:31:40,228 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-10-28 14:31:40,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:40,230 INFO L225 Difference]: With dead ends: 230 [2020-10-28 14:31:40,230 INFO L226 Difference]: Without dead ends: 226 [2020-10-28 14:31:40,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:31:40,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-28 14:31:40,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 187. [2020-10-28 14:31:40,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-28 14:31:40,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 204 transitions. [2020-10-28 14:31:40,250 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 204 transitions. Word has length 62 [2020-10-28 14:31:40,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:40,251 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 204 transitions. [2020-10-28 14:31:40,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:31:40,251 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 204 transitions. [2020-10-28 14:31:40,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 14:31:40,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:40,252 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 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] [2020-10-28 14:31:40,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 14:31:40,252 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:40,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:40,252 INFO L82 PathProgramCache]: Analyzing trace with hash -712663900, now seen corresponding path program 8 times [2020-10-28 14:31:40,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:40,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302009189] [2020-10-28 14:31:40,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:40,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:40,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:40,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:41,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:42,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:42,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 14:31:42,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:31:42,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2497 [2020-10-28 14:31:42,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:42,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:42,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:31:42,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:42,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 14:31:42,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:43,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:43,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:43,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:43,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:43,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:43,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:43,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:31:43,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:43,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:43,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:43,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:43,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:43,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:43,328 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:43,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302009189] [2020-10-28 14:31:43,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:43,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:31:43,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554863152] [2020-10-28 14:31:43,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:31:43,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:43,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:31:43,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:31:43,329 INFO L87 Difference]: Start difference. First operand 187 states and 204 transitions. Second operand 14 states. [2020-10-28 14:31:45,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:45,060 INFO L93 Difference]: Finished difference Result 291 states and 319 transitions. [2020-10-28 14:31:45,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:31:45,061 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-10-28 14:31:45,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:45,063 INFO L225 Difference]: With dead ends: 291 [2020-10-28 14:31:45,063 INFO L226 Difference]: Without dead ends: 287 [2020-10-28 14:31:45,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:31:45,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-10-28 14:31:45,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 254. [2020-10-28 14:31:45,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-28 14:31:45,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 276 transitions. [2020-10-28 14:31:45,084 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 276 transitions. Word has length 62 [2020-10-28 14:31:45,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:45,084 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 276 transitions. [2020-10-28 14:31:45,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:31:45,084 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 276 transitions. [2020-10-28 14:31:45,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 14:31:45,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:45,085 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 14:31:45,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 14:31:45,086 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:45,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:45,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1706100734, now seen corresponding path program 9 times [2020-10-28 14:31:45,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:45,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463937341] [2020-10-28 14:31:45,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:45,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:45,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:46,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:46,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 14:31:46,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:46,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1001 [2020-10-28 14:31:46,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:46,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:46,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:31:46,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:46,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 14:31:46,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:46,610 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2020-10-28 14:31:46,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:46,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:46,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:46,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:46,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:46,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:46,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:46,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:46,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:46,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:46,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:46,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:46,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:46,859 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:46,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463937341] [2020-10-28 14:31:46,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:46,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:31:46,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665780433] [2020-10-28 14:31:46,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:31:46,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:46,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:31:46,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:31:46,860 INFO L87 Difference]: Start difference. First operand 254 states and 276 transitions. Second operand 14 states. [2020-10-28 14:31:48,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:48,750 INFO L93 Difference]: Finished difference Result 310 states and 340 transitions. [2020-10-28 14:31:48,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:31:48,750 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-10-28 14:31:48,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:48,752 INFO L225 Difference]: With dead ends: 310 [2020-10-28 14:31:48,753 INFO L226 Difference]: Without dead ends: 306 [2020-10-28 14:31:48,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:31:48,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-28 14:31:48,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 278. [2020-10-28 14:31:48,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-10-28 14:31:48,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 302 transitions. [2020-10-28 14:31:48,770 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 302 transitions. Word has length 62 [2020-10-28 14:31:48,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:48,770 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 302 transitions. [2020-10-28 14:31:48,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:31:48,771 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 302 transitions. [2020-10-28 14:31:48,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 14:31:48,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:48,772 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 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] [2020-10-28 14:31:48,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-28 14:31:48,772 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:48,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:48,772 INFO L82 PathProgramCache]: Analyzing trace with hash -437904286, now seen corresponding path program 9 times [2020-10-28 14:31:48,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:48,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913095447] [2020-10-28 14:31:48,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:48,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:48,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:49,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:50,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:52,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:52,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 14:31:52,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:31:52,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3298 [2020-10-28 14:31:52,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:52,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:52,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:31:52,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:52,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 14:31:52,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:52,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:52,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:52,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:52,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:52,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:52,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:52,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:52,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:52,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:52,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:52,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:52,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:52,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:52,748 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:52,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913095447] [2020-10-28 14:31:52,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:52,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:31:52,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249840417] [2020-10-28 14:31:52,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:31:52,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:52,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:31:52,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:31:52,750 INFO L87 Difference]: Start difference. First operand 278 states and 302 transitions. Second operand 14 states. [2020-10-28 14:31:54,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:54,573 INFO L93 Difference]: Finished difference Result 314 states and 343 transitions. [2020-10-28 14:31:54,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:31:54,574 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-10-28 14:31:54,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:54,576 INFO L225 Difference]: With dead ends: 314 [2020-10-28 14:31:54,576 INFO L226 Difference]: Without dead ends: 310 [2020-10-28 14:31:54,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:31:54,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-10-28 14:31:54,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 195. [2020-10-28 14:31:54,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-28 14:31:54,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 213 transitions. [2020-10-28 14:31:54,590 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 213 transitions. Word has length 62 [2020-10-28 14:31:54,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:54,591 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 213 transitions. [2020-10-28 14:31:54,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:31:54,591 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 213 transitions. [2020-10-28 14:31:54,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 14:31:54,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:54,592 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 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] [2020-10-28 14:31:54,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-28 14:31:54,592 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:54,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:54,592 INFO L82 PathProgramCache]: Analyzing trace with hash 969457326, now seen corresponding path program 10 times [2020-10-28 14:31:54,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:54,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008651679] [2020-10-28 14:31:54,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:54,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:54,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:55,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:55,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:59,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:59,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 14:31:59,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:31:59,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4417 [2020-10-28 14:31:59,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:59,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:59,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:31:59,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:59,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 14:31:59,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:59,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:59,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:59,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:59,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:59,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:59,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:59,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:59,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:59,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:59,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:59,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:59,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:59,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:59,510 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:59,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2008651679] [2020-10-28 14:31:59,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:59,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:31:59,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842389870] [2020-10-28 14:31:59,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:31:59,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:59,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:31:59,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:31:59,511 INFO L87 Difference]: Start difference. First operand 195 states and 213 transitions. Second operand 15 states. [2020-10-28 14:32:01,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:01,550 INFO L93 Difference]: Finished difference Result 322 states and 352 transitions. [2020-10-28 14:32:01,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:32:01,550 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 65 [2020-10-28 14:32:01,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:01,553 INFO L225 Difference]: With dead ends: 322 [2020-10-28 14:32:01,553 INFO L226 Difference]: Without dead ends: 318 [2020-10-28 14:32:01,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:32:01,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-10-28 14:32:01,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 294. [2020-10-28 14:32:01,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-10-28 14:32:01,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 320 transitions. [2020-10-28 14:32:01,578 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 320 transitions. Word has length 65 [2020-10-28 14:32:01,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:01,579 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 320 transitions. [2020-10-28 14:32:01,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:32:01,579 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 320 transitions. [2020-10-28 14:32:01,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 14:32:01,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:01,580 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 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] [2020-10-28 14:32:01,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-28 14:32:01,580 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:01,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:01,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1174547694, now seen corresponding path program 10 times [2020-10-28 14:32:01,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:01,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974633451] [2020-10-28 14:32:01,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:01,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:01,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:02,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:03,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:03,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 14:32:03,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:32:03,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1815 [2020-10-28 14:32:03,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:03,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:03,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:32:03,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:03,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 14:32:03,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:04,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:04,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:04,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:04,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:04,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:04,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:04,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:32:04,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:04,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:04,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:04,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:04,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:04,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:04,220 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:04,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974633451] [2020-10-28 14:32:04,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:04,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:32:04,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757763449] [2020-10-28 14:32:04,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:32:04,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:04,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:32:04,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:32:04,222 INFO L87 Difference]: Start difference. First operand 294 states and 320 transitions. Second operand 15 states. [2020-10-28 14:32:06,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:06,447 INFO L93 Difference]: Finished difference Result 331 states and 363 transitions. [2020-10-28 14:32:06,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:32:06,448 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 65 [2020-10-28 14:32:06,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:06,451 INFO L225 Difference]: With dead ends: 331 [2020-10-28 14:32:06,451 INFO L226 Difference]: Without dead ends: 318 [2020-10-28 14:32:06,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:32:06,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-10-28 14:32:06,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 302. [2020-10-28 14:32:06,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-10-28 14:32:06,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 328 transitions. [2020-10-28 14:32:06,476 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 328 transitions. Word has length 65 [2020-10-28 14:32:06,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:06,476 INFO L481 AbstractCegarLoop]: Abstraction has 302 states and 328 transitions. [2020-10-28 14:32:06,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:32:06,476 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 328 transitions. [2020-10-28 14:32:06,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 14:32:06,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:06,477 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 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] [2020-10-28 14:32:06,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-28 14:32:06,478 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:06,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:06,478 INFO L82 PathProgramCache]: Analyzing trace with hash 125451824, now seen corresponding path program 11 times [2020-10-28 14:32:06,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:06,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325316807] [2020-10-28 14:32:06,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:06,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:06,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:07,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:09,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:09,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 14:32:09,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:32:09,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3059 [2020-10-28 14:32:09,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:09,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:09,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:32:09,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:09,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 14:32:09,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:09,936 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-10-28 14:32:10,059 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-28 14:32:10,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:10,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:10,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:10,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:10,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:10,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:10,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:10,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:10,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:10,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:10,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:10,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:10,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:10,474 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:10,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325316807] [2020-10-28 14:32:10,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:10,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:32:10,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790493665] [2020-10-28 14:32:10,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:32:10,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:10,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:32:10,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:32:10,476 INFO L87 Difference]: Start difference. First operand 302 states and 328 transitions. Second operand 14 states. [2020-10-28 14:32:12,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:12,229 INFO L93 Difference]: Finished difference Result 346 states and 380 transitions. [2020-10-28 14:32:12,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:32:12,230 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 65 [2020-10-28 14:32:12,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:12,233 INFO L225 Difference]: With dead ends: 346 [2020-10-28 14:32:12,234 INFO L226 Difference]: Without dead ends: 328 [2020-10-28 14:32:12,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:32:12,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-28 14:32:12,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 297. [2020-10-28 14:32:12,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-10-28 14:32:12,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 322 transitions. [2020-10-28 14:32:12,261 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 322 transitions. Word has length 65 [2020-10-28 14:32:12,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:12,261 INFO L481 AbstractCegarLoop]: Abstraction has 297 states and 322 transitions. [2020-10-28 14:32:12,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:32:12,261 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 322 transitions. [2020-10-28 14:32:12,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 14:32:12,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:12,262 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 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] [2020-10-28 14:32:12,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-28 14:32:12,263 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:12,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:12,263 INFO L82 PathProgramCache]: Analyzing trace with hash -2018553196, now seen corresponding path program 11 times [2020-10-28 14:32:12,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:12,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039110125] [2020-10-28 14:32:12,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:12,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:12,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:13,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:15,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:15,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 14:32:15,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:32:15,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3140 [2020-10-28 14:32:15,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:15,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:15,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:32:15,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:15,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 14:32:15,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:15,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:15,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:15,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:15,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:15,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:15,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:15,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:15,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:15,921 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:15,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:15,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:15,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:15,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:15,952 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:15,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039110125] [2020-10-28 14:32:15,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:15,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:32:15,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511758092] [2020-10-28 14:32:15,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:32:15,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:15,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:32:15,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:32:15,954 INFO L87 Difference]: Start difference. First operand 297 states and 322 transitions. Second operand 15 states. [2020-10-28 14:32:18,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:18,594 INFO L93 Difference]: Finished difference Result 404 states and 444 transitions. [2020-10-28 14:32:18,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:32:18,595 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 65 [2020-10-28 14:32:18,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:18,597 INFO L225 Difference]: With dead ends: 404 [2020-10-28 14:32:18,597 INFO L226 Difference]: Without dead ends: 400 [2020-10-28 14:32:18,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:32:18,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2020-10-28 14:32:18,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 345. [2020-10-28 14:32:18,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-28 14:32:18,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 373 transitions. [2020-10-28 14:32:18,625 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 373 transitions. Word has length 65 [2020-10-28 14:32:18,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:18,625 INFO L481 AbstractCegarLoop]: Abstraction has 345 states and 373 transitions. [2020-10-28 14:32:18,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:32:18,626 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 373 transitions. [2020-10-28 14:32:18,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 14:32:18,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:18,627 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 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] [2020-10-28 14:32:18,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-28 14:32:18,627 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:18,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:18,628 INFO L82 PathProgramCache]: Analyzing trace with hash -541903628, now seen corresponding path program 12 times [2020-10-28 14:32:18,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:18,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67419563] [2020-10-28 14:32:18,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:18,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:18,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:19,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:21,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:21,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 14:32:21,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:32:21,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2432 [2020-10-28 14:32:21,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:21,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:21,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:32:21,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:21,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 14:32:21,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:21,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:21,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:21,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:21,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:21,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:21,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:21,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:32:21,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:21,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:21,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:21,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:21,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:21,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:21,975 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:21,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67419563] [2020-10-28 14:32:21,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:21,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:32:21,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616699071] [2020-10-28 14:32:21,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:32:21,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:21,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:32:21,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:32:21,977 INFO L87 Difference]: Start difference. First operand 345 states and 373 transitions. Second operand 15 states. [2020-10-28 14:32:24,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:24,042 INFO L93 Difference]: Finished difference Result 456 states and 499 transitions. [2020-10-28 14:32:24,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:32:24,043 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 65 [2020-10-28 14:32:24,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:24,046 INFO L225 Difference]: With dead ends: 456 [2020-10-28 14:32:24,046 INFO L226 Difference]: Without dead ends: 438 [2020-10-28 14:32:24,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:32:24,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2020-10-28 14:32:24,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 372. [2020-10-28 14:32:24,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2020-10-28 14:32:24,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 403 transitions. [2020-10-28 14:32:24,072 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 403 transitions. Word has length 65 [2020-10-28 14:32:24,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:24,073 INFO L481 AbstractCegarLoop]: Abstraction has 372 states and 403 transitions. [2020-10-28 14:32:24,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:32:24,073 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 403 transitions. [2020-10-28 14:32:24,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 14:32:24,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:24,074 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 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] [2020-10-28 14:32:24,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-28 14:32:24,074 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:24,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:24,075 INFO L82 PathProgramCache]: Analyzing trace with hash -2064592720, now seen corresponding path program 13 times [2020-10-28 14:32:24,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:24,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740748590] [2020-10-28 14:32:24,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:24,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:24,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:24,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:26,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:26,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 14:32:26,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:32:26,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2439 [2020-10-28 14:32:26,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:26,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:26,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:32:26,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:26,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 14:32:26,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:26,937 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-28 14:32:27,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:27,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:27,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:27,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:27,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:27,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:27,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:27,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:27,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:27,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:27,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:27,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:27,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:27,365 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:27,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740748590] [2020-10-28 14:32:27,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:27,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:32:27,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223882925] [2020-10-28 14:32:27,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:32:27,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:27,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:32:27,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:32:27,367 INFO L87 Difference]: Start difference. First operand 372 states and 403 transitions. Second operand 16 states. [2020-10-28 14:32:30,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:30,264 INFO L93 Difference]: Finished difference Result 471 states and 513 transitions. [2020-10-28 14:32:30,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:32:30,265 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2020-10-28 14:32:30,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:30,268 INFO L225 Difference]: With dead ends: 471 [2020-10-28 14:32:30,268 INFO L226 Difference]: Without dead ends: 467 [2020-10-28 14:32:30,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:32:30,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2020-10-28 14:32:30,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 431. [2020-10-28 14:32:30,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 431 states. [2020-10-28 14:32:30,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 468 transitions. [2020-10-28 14:32:30,298 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 468 transitions. Word has length 65 [2020-10-28 14:32:30,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:30,298 INFO L481 AbstractCegarLoop]: Abstraction has 431 states and 468 transitions. [2020-10-28 14:32:30,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:32:30,299 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 468 transitions. [2020-10-28 14:32:30,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 14:32:30,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:30,300 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 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] [2020-10-28 14:32:30,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-28 14:32:30,300 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:30,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:30,301 INFO L82 PathProgramCache]: Analyzing trace with hash 86369556, now seen corresponding path program 12 times [2020-10-28 14:32:30,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:30,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467543317] [2020-10-28 14:32:30,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:30,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:30,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:30,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:32,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:32,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:34,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:34,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 14:32:34,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:32:34,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4158 [2020-10-28 14:32:34,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:34,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:34,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:32:34,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:34,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 14:32:34,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:35,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:35,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:35,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:35,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:35,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:35,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:35,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:35,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:35,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:35,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:35,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:35,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:35,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:35,181 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:35,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467543317] [2020-10-28 14:32:35,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:35,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:32:35,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304305356] [2020-10-28 14:32:35,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:32:35,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:35,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:32:35,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:32:35,183 INFO L87 Difference]: Start difference. First operand 431 states and 468 transitions. Second operand 16 states. [2020-10-28 14:32:38,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:38,309 INFO L93 Difference]: Finished difference Result 589 states and 644 transitions. [2020-10-28 14:32:38,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:32:38,309 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2020-10-28 14:32:38,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:38,314 INFO L225 Difference]: With dead ends: 589 [2020-10-28 14:32:38,314 INFO L226 Difference]: Without dead ends: 585 [2020-10-28 14:32:38,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:32:38,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2020-10-28 14:32:38,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 462. [2020-10-28 14:32:38,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462 states. [2020-10-28 14:32:38,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 505 transitions. [2020-10-28 14:32:38,354 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 505 transitions. Word has length 65 [2020-10-28 14:32:38,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:38,354 INFO L481 AbstractCegarLoop]: Abstraction has 462 states and 505 transitions. [2020-10-28 14:32:38,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:32:38,354 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 505 transitions. [2020-10-28 14:32:38,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 14:32:38,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:38,355 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:38,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-28 14:32:38,356 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:38,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:38,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1386369074, now seen corresponding path program 5 times [2020-10-28 14:32:38,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:38,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941960712] [2020-10-28 14:32:38,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:38,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:38,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:39,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:41,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:41,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 14:32:41,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:32:41,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3193 [2020-10-28 14:32:41,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:41,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:41,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:32:41,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:41,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 14:32:41,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:42,042 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-28 14:32:42,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:42,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:42,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:42,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:42,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:42,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:42,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:42,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:42,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:42,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:42,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:42,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:42,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:42,462 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:42,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941960712] [2020-10-28 14:32:42,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:42,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:32:42,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347486727] [2020-10-28 14:32:42,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:32:42,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:42,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:32:42,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:32:42,463 INFO L87 Difference]: Start difference. First operand 462 states and 505 transitions. Second operand 16 states. [2020-10-28 14:32:45,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:45,389 INFO L93 Difference]: Finished difference Result 532 states and 584 transitions. [2020-10-28 14:32:45,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:32:45,390 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2020-10-28 14:32:45,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:45,393 INFO L225 Difference]: With dead ends: 532 [2020-10-28 14:32:45,393 INFO L226 Difference]: Without dead ends: 528 [2020-10-28 14:32:45,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:32:45,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2020-10-28 14:32:45,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 483. [2020-10-28 14:32:45,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 483 states. [2020-10-28 14:32:45,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 528 transitions. [2020-10-28 14:32:45,429 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 528 transitions. Word has length 65 [2020-10-28 14:32:45,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:45,429 INFO L481 AbstractCegarLoop]: Abstraction has 483 states and 528 transitions. [2020-10-28 14:32:45,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:32:45,430 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 528 transitions. [2020-10-28 14:32:45,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 14:32:45,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:45,431 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 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 14:32:45,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-28 14:32:45,431 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:45,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:45,432 INFO L82 PathProgramCache]: Analyzing trace with hash -757635946, now seen corresponding path program 8 times [2020-10-28 14:32:45,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:45,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405593593] [2020-10-28 14:32:45,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:45,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:45,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:46,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:47,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:48,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:50,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:50,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 14:32:50,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:32:50,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 14:32:50,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:50,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:50,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:32:50,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:50,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 14:32:50,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:51,013 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-28 14:32:51,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:51,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:51,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:51,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:51,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:51,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:51,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:32:51,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:51,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:51,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:51,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:51,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:51,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:51,292 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:51,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405593593] [2020-10-28 14:32:51,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:51,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:32:51,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340944078] [2020-10-28 14:32:51,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:32:51,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:51,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:32:51,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:32:51,294 INFO L87 Difference]: Start difference. First operand 483 states and 528 transitions. Second operand 16 states. [2020-10-28 14:32:54,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:54,357 INFO L93 Difference]: Finished difference Result 539 states and 592 transitions. [2020-10-28 14:32:54,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:32:54,358 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2020-10-28 14:32:54,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:54,361 INFO L225 Difference]: With dead ends: 539 [2020-10-28 14:32:54,361 INFO L226 Difference]: Without dead ends: 535 [2020-10-28 14:32:54,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:32:54,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2020-10-28 14:32:54,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 369. [2020-10-28 14:32:54,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-10-28 14:32:54,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 401 transitions. [2020-10-28 14:32:54,385 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 401 transitions. Word has length 65 [2020-10-28 14:32:54,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:54,385 INFO L481 AbstractCegarLoop]: Abstraction has 369 states and 401 transitions. [2020-10-28 14:32:54,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:32:54,385 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 401 transitions. [2020-10-28 14:32:54,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 14:32:54,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:54,386 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 3, 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] [2020-10-28 14:32:54,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-28 14:32:54,386 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:54,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:54,386 INFO L82 PathProgramCache]: Analyzing trace with hash -79438364, now seen corresponding path program 13 times [2020-10-28 14:32:54,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:54,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954546081] [2020-10-28 14:32:54,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:54,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:54,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:54,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:57,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:57,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 14:32:57,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:32:57,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2593 [2020-10-28 14:32:57,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:57,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:57,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:32:57,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:57,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 14:32:57,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:57,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:57,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:57,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:57,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:57,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:57,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:57,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:57,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:57,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:57,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:57,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:57,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:57,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:57,536 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 5 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:57,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954546081] [2020-10-28 14:32:57,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:57,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:32:57,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757341157] [2020-10-28 14:32:57,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:32:57,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:57,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:32:57,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:32:57,538 INFO L87 Difference]: Start difference. First operand 369 states and 401 transitions. Second operand 15 states. [2020-10-28 14:32:59,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:59,867 INFO L93 Difference]: Finished difference Result 384 states and 418 transitions. [2020-10-28 14:32:59,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:32:59,868 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 68 [2020-10-28 14:32:59,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:59,871 INFO L225 Difference]: With dead ends: 384 [2020-10-28 14:32:59,871 INFO L226 Difference]: Without dead ends: 314 [2020-10-28 14:32:59,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:32:59,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-28 14:32:59,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 314. [2020-10-28 14:32:59,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2020-10-28 14:32:59,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 341 transitions. [2020-10-28 14:32:59,892 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 341 transitions. Word has length 68 [2020-10-28 14:32:59,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:59,893 INFO L481 AbstractCegarLoop]: Abstraction has 314 states and 341 transitions. [2020-10-28 14:32:59,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:32:59,893 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 341 transitions. [2020-10-28 14:32:59,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 14:32:59,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:59,893 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 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] [2020-10-28 14:32:59,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-28 14:32:59,894 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:59,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:59,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1035207358, now seen corresponding path program 14 times [2020-10-28 14:32:59,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:59,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856354736] [2020-10-28 14:32:59,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:59,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:59,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:00,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:03,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:03,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 14:33:03,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:33:03,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3382 [2020-10-28 14:33:03,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:03,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:03,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:33:03,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:03,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 14:33:03,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:04,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:04,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:04,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:04,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:04,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:04,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:04,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:33:04,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:04,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:04,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:04,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:04,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:04,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:04,062 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:04,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856354736] [2020-10-28 14:33:04,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:04,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:33:04,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831180383] [2020-10-28 14:33:04,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:33:04,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:04,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:33:04,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:33:04,064 INFO L87 Difference]: Start difference. First operand 314 states and 341 transitions. Second operand 16 states. [2020-10-28 14:33:07,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:07,019 INFO L93 Difference]: Finished difference Result 394 states and 429 transitions. [2020-10-28 14:33:07,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:33:07,020 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 68 [2020-10-28 14:33:07,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:07,023 INFO L225 Difference]: With dead ends: 394 [2020-10-28 14:33:07,023 INFO L226 Difference]: Without dead ends: 390 [2020-10-28 14:33:07,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:33:07,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-10-28 14:33:07,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 371. [2020-10-28 14:33:07,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2020-10-28 14:33:07,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 402 transitions. [2020-10-28 14:33:07,048 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 402 transitions. Word has length 68 [2020-10-28 14:33:07,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:07,048 INFO L481 AbstractCegarLoop]: Abstraction has 371 states and 402 transitions. [2020-10-28 14:33:07,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:33:07,049 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 402 transitions. [2020-10-28 14:33:07,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 14:33:07,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:07,050 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 3, 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] [2020-10-28 14:33:07,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-28 14:33:07,050 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:07,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:07,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1108797662, now seen corresponding path program 14 times [2020-10-28 14:33:07,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:07,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194777946] [2020-10-28 14:33:07,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:07,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:07,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:07,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:09,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:12,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:12,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 14:33:12,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:33:12,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 14:33:12,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:12,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:12,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:33:12,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:12,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 14:33:12,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:12,665 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2020-10-28 14:33:13,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:13,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:13,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:13,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:13,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:13,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:33:13,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:13,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:13,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:13,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:13,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:13,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:13,122 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:13,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194777946] [2020-10-28 14:33:13,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:13,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:33:13,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637973829] [2020-10-28 14:33:13,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:33:13,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:13,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:33:13,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:33:13,123 INFO L87 Difference]: Start difference. First operand 371 states and 402 transitions. Second operand 16 states. [2020-10-28 14:33:16,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:16,121 INFO L93 Difference]: Finished difference Result 403 states and 440 transitions. [2020-10-28 14:33:16,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:33:16,122 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 68 [2020-10-28 14:33:16,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:16,125 INFO L225 Difference]: With dead ends: 403 [2020-10-28 14:33:16,126 INFO L226 Difference]: Without dead ends: 390 [2020-10-28 14:33:16,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:33:16,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-10-28 14:33:16,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 374. [2020-10-28 14:33:16,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2020-10-28 14:33:16,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 405 transitions. [2020-10-28 14:33:16,153 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 405 transitions. Word has length 68 [2020-10-28 14:33:16,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:16,153 INFO L481 AbstractCegarLoop]: Abstraction has 374 states and 405 transitions. [2020-10-28 14:33:16,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:33:16,153 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 405 transitions. [2020-10-28 14:33:16,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 14:33:16,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:16,154 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 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] [2020-10-28 14:33:16,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-28 14:33:16,154 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:16,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:16,155 INFO L82 PathProgramCache]: Analyzing trace with hash -2028576706, now seen corresponding path program 15 times [2020-10-28 14:33:16,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:16,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660235415] [2020-10-28 14:33:16,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:16,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:16,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:16,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:17,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:20,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:21,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:21,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 14:33:21,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:33:21,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 14:33:21,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:21,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:21,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:33:21,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:21,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 14:33:21,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:21,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:21,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:21,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:21,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:21,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:21,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:21,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:33:21,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:21,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:21,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:21,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:21,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:21,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:22,010 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:22,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660235415] [2020-10-28 14:33:22,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:22,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:33:22,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205367195] [2020-10-28 14:33:22,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:33:22,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:22,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:33:22,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:33:22,011 INFO L87 Difference]: Start difference. First operand 374 states and 405 transitions. Second operand 17 states. [2020-10-28 14:33:25,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:25,539 INFO L93 Difference]: Finished difference Result 550 states and 601 transitions. [2020-10-28 14:33:25,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 14:33:25,540 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 68 [2020-10-28 14:33:25,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:25,542 INFO L225 Difference]: With dead ends: 550 [2020-10-28 14:33:25,542 INFO L226 Difference]: Without dead ends: 546 [2020-10-28 14:33:25,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:33:25,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-10-28 14:33:25,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 517. [2020-10-28 14:33:25,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 517 states. [2020-10-28 14:33:25,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 564 transitions. [2020-10-28 14:33:25,573 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 564 transitions. Word has length 68 [2020-10-28 14:33:25,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:25,573 INFO L481 AbstractCegarLoop]: Abstraction has 517 states and 564 transitions. [2020-10-28 14:33:25,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:33:25,574 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 564 transitions. [2020-10-28 14:33:25,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 14:33:25,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:25,575 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 3, 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] [2020-10-28 14:33:25,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-28 14:33:25,575 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:25,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:25,575 INFO L82 PathProgramCache]: Analyzing trace with hash 122385570, now seen corresponding path program 15 times [2020-10-28 14:33:25,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:25,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403298961] [2020-10-28 14:33:25,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:25,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:25,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:26,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:27,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking...